git.sesse.net Git - ffmpeg/blob - libavcodec/error_resilience.c

   1 /*
   2  * Error resilience / concealment
   3  *
   4  * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
   5  *
   6  * This file is part of Libav.
   7  *
   8  * Libav is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public
  10  * License as published by the Free Software Foundation; either
  11  * version 2.1 of the License, or (at your option) any later version.
  12  *
  13  * Libav is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * Lesser General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public
  19  * License along with Libav; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  21  */
  22
  23 /**
  24  * @file
  25  * Error resilience / concealment.
  26  */
  27
  28 #include <limits.h>
  29
  30 #include "avcodec.h"
  31 #include "dsputil.h"
  32 #include "mpegvideo.h"
  33 #include "h264.h"
  34 #include "rectangle.h"
  35 #include "thread.h"
  36
  37 /*
  38  * H264 redefines mb_intra so it is not mistakely used (its uninitialized in h264)
  39  * but error concealment must support both h264 and h263 thus we must undo this
  40  */
  41 #undef mb_intra
  42
  43 static void decode_mb(MpegEncContext *s, int ref){
  44     s->dest[0] = s->current_picture.f.data[0] + (s->mb_y *  16 * s->linesize)                         + s->mb_x *  16;
  45     s->dest[1] = s->current_picture.f.data[1] + (s->mb_y * (16 >> s->chroma_y_shift) * s->uvlinesize) + s->mb_x * (16 >> s->chroma_x_shift);
  46     s->dest[2] = s->current_picture.f.data[2] + (s->mb_y * (16 >> s->chroma_y_shift) * s->uvlinesize) + s->mb_x * (16 >> s->chroma_x_shift);
  47
  48     if(CONFIG_H264_DECODER && s->codec_id == CODEC_ID_H264){
  49         H264Context *h= (void*)s;
  50         h->mb_xy= s->mb_x + s->mb_y*s->mb_stride;
  51         memset(h->non_zero_count_cache, 0, sizeof(h->non_zero_count_cache));
  52         assert(ref>=0);
  53         /* FIXME: It is posible albeit uncommon that slice references
  54          * differ between slices. We take the easy approach and ignore
  55          * it for now. If this turns out to have any relevance in
  56          * practice then correct remapping should be added. */
  57         if (ref >= h->ref_count[0])
  58             ref=0;
  59         fill_rectangle(&s->current_picture.f.ref_index[0][4*h->mb_xy], 2, 2, 2, ref, 1);
  60         fill_rectangle(&h->ref_cache[0][scan8[0]], 4, 4, 8, ref, 1);
  61         fill_rectangle(h->mv_cache[0][ scan8[0] ], 4, 4, 8, pack16to32(s->mv[0][0][0],s->mv[0][0][1]), 4);
  62         assert(!FRAME_MBAFF);
  63         ff_h264_hl_decode_mb(h);
  64     }else{
  65         assert(ref==0);
  66     MPV_decode_mb(s, s->block);
  67     }
  68 }
  69
  70 /**
  71  * @param stride the number of MVs to get to the next row
  72  * @param mv_step the number of MVs per row or column in a macroblock
  73  */
  74 static void set_mv_strides(MpegEncContext *s, int *mv_step, int *stride){
  75     if(s->codec_id == CODEC_ID_H264){
  76         H264Context *h= (void*)s;
  77         assert(s->quarter_sample);
  78         *mv_step= 4;
  79         *stride= h->b_stride;
  80     }else{
  81         *mv_step= 2;
  82         *stride= s->b8_stride;
  83     }
  84 }
  85
  86 /**
  87  * Replace the current MB with a flat dc-only version.
  88  */
  89 static void put_dc(MpegEncContext *s, uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr, int mb_x, int mb_y)
  90 {
  91     int dc, dcu, dcv, y, i;
  92     for(i=0; i<4; i++){
  93         dc= s->dc_val[0][mb_x*2 + (i&1) + (mb_y*2 + (i>>1))*s->b8_stride];
  94         if(dc<0) dc=0;
  95         else if(dc>2040) dc=2040;
  96         for(y=0; y<8; y++){
  97             int x;
  98             for(x=0; x<8; x++){
  99                 dest_y[x + (i&1)*8 + (y + (i>>1)*8)*s->linesize]= dc/8;
 100             }
 101         }
 102     }
 103     dcu = s->dc_val[1][mb_x + mb_y*s->mb_stride];
 104     dcv = s->dc_val[2][mb_x + mb_y*s->mb_stride];
 105     if     (dcu<0   ) dcu=0;
 106     else if(dcu>2040) dcu=2040;
 107     if     (dcv<0   ) dcv=0;
 108     else if(dcv>2040) dcv=2040;
 109     for(y=0; y<8; y++){
 110         int x;
 111         for(x=0; x<8; x++){
 112             dest_cb[x + y * s->uvlinesize] = dcu / 8;
 113             dest_cr[x + y * s->uvlinesize] = dcv / 8;
 114         }
 115     }
 116 }
 117
 118 static void filter181(int16_t *data, int width, int height, int stride){
 119     int x,y;
 120
 121     /* horizontal filter */
 122     for(y=1; y<height-1; y++){
 123         int prev_dc= data[0 + y*stride];
 124
 125         for(x=1; x<width-1; x++){
 126             int dc;
 127
 128             dc= - prev_dc
 129                 + data[x     + y*stride]*8
 130                 - data[x + 1 + y*stride];
 131             dc= (dc*10923 + 32768)>>16;
 132             prev_dc= data[x + y*stride];
 133             data[x + y*stride]= dc;
 134         }
 135     }
 136
 137     /* vertical filter */
 138     for(x=1; x<width-1; x++){
 139         int prev_dc= data[x];
 140
 141         for(y=1; y<height-1; y++){
 142             int dc;
 143
 144             dc= - prev_dc
 145                 + data[x +  y   *stride]*8
 146                 - data[x + (y+1)*stride];
 147             dc= (dc*10923 + 32768)>>16;
 148             prev_dc= data[x + y*stride];
 149             data[x + y*stride]= dc;
 150         }
 151     }
 152 }
 153
 154 /**
 155  * guess the dc of blocks which do not have an undamaged dc
 156  * @param w     width in 8 pixel blocks
 157  * @param h     height in 8 pixel blocks
 158  */
 159 static void guess_dc(MpegEncContext *s, int16_t *dc, int w, int h, int stride, int is_luma){
 160     int b_x, b_y;
 161
 162     for(b_y=0; b_y<h; b_y++){
 163         for(b_x=0; b_x<w; b_x++){
 164             int color[4]={1024,1024,1024,1024};
 165             int distance[4]={9999,9999,9999,9999};
 166             int mb_index, error, j;
 167             int64_t guess, weight_sum;
 168
 169             mb_index= (b_x>>is_luma) + (b_y>>is_luma)*s->mb_stride;
 170
 171             error= s->error_status_table[mb_index];
 172
 173             if(IS_INTER(s->current_picture.f.mb_type[mb_index])) continue; //inter
 174             if(!(error&ER_DC_ERROR)) continue;           //dc-ok
 175
 176             /* right block */
 177             for(j=b_x+1; j<w; j++){
 178                 int mb_index_j= (j>>is_luma) + (b_y>>is_luma)*s->mb_stride;
 179                 int error_j= s->error_status_table[mb_index_j];
 180                 int intra_j = IS_INTRA(s->current_picture.f.mb_type[mb_index_j]);
 181                 if(intra_j==0 || !(error_j&ER_DC_ERROR)){
 182                     color[0]= dc[j + b_y*stride];
 183                     distance[0]= j-b_x;
 184                     break;
 185                 }
 186             }
 187
 188             /* left block */
 189             for(j=b_x-1; j>=0; j--){
 190                 int mb_index_j= (j>>is_luma) + (b_y>>is_luma)*s->mb_stride;
 191                 int error_j= s->error_status_table[mb_index_j];
 192                 int intra_j = IS_INTRA(s->current_picture.f.mb_type[mb_index_j]);
 193                 if(intra_j==0 || !(error_j&ER_DC_ERROR)){
 194                     color[1]= dc[j + b_y*stride];
 195                     distance[1]= b_x-j;
 196                     break;
 197                 }
 198             }
 199
 200             /* bottom block */
 201             for(j=b_y+1; j<h; j++){
 202                 int mb_index_j= (b_x>>is_luma) + (j>>is_luma)*s->mb_stride;
 203                 int error_j= s->error_status_table[mb_index_j];
 204                 int intra_j = IS_INTRA(s->current_picture.f.mb_type[mb_index_j]);
 205                 if(intra_j==0 || !(error_j&ER_DC_ERROR)){
 206                     color[2]= dc[b_x + j*stride];
 207                     distance[2]= j-b_y;
 208                     break;
 209                 }
 210             }
 211
 212             /* top block */
 213             for(j=b_y-1; j>=0; j--){
 214                 int mb_index_j= (b_x>>is_luma) + (j>>is_luma)*s->mb_stride;
 215                 int error_j= s->error_status_table[mb_index_j];
 216                 int intra_j = IS_INTRA(s->current_picture.f.mb_type[mb_index_j]);
 217                 if(intra_j==0 || !(error_j&ER_DC_ERROR)){
 218                     color[3]= dc[b_x + j*stride];
 219                     distance[3]= b_y-j;
 220                     break;
 221                 }
 222             }
 223
 224             weight_sum=0;
 225             guess=0;
 226             for(j=0; j<4; j++){
 227                 int64_t weight= 256*256*256*16/distance[j];
 228                 guess+= weight*(int64_t)color[j];
 229                 weight_sum+= weight;
 230             }
 231             guess= (guess + weight_sum/2) / weight_sum;
 232
 233             dc[b_x + b_y*stride]= guess;
 234         }
 235     }
 236 }
 237
 238 /**
 239  * simple horizontal deblocking filter used for error resilience
 240  * @param w     width in 8 pixel blocks
 241  * @param h     height in 8 pixel blocks
 242  */
 243 static void h_block_filter(MpegEncContext *s, uint8_t *dst, int w, int h, int stride, int is_luma){
 244     int b_x, b_y, mvx_stride, mvy_stride;
 245     uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
 246     set_mv_strides(s, &mvx_stride, &mvy_stride);
 247     mvx_stride >>= is_luma;
 248     mvy_stride *= mvx_stride;
 249
 250     for(b_y=0; b_y<h; b_y++){
 251         for(b_x=0; b_x<w-1; b_x++){
 252             int y;
 253             int left_status = s->error_status_table[( b_x   >>is_luma) + (b_y>>is_luma)*s->mb_stride];
 254             int right_status= s->error_status_table[((b_x+1)>>is_luma) + (b_y>>is_luma)*s->mb_stride];
 255             int left_intra  = IS_INTRA(s->current_picture.f.mb_type[( b_x      >> is_luma) + (b_y >> is_luma) * s->mb_stride]);
 256             int right_intra = IS_INTRA(s->current_picture.f.mb_type[((b_x + 1) >> is_luma) + (b_y >> is_luma) * s->mb_stride]);
 257             int left_damage =  left_status&ER_MB_ERROR;
 258             int right_damage= right_status&ER_MB_ERROR;
 259             int offset= b_x*8 + b_y*stride*8;
 260             int16_t *left_mv=  s->current_picture.f.motion_val[0][mvy_stride*b_y + mvx_stride* b_x   ];
 261             int16_t *right_mv= s->current_picture.f.motion_val[0][mvy_stride*b_y + mvx_stride*(b_x+1)];
 262
 263             if(!(left_damage||right_damage)) continue; // both undamaged
 264
 265             if(   (!left_intra) && (!right_intra)
 266                && FFABS(left_mv[0]-right_mv[0]) + FFABS(left_mv[1]+right_mv[1]) < 2) continue;
 267
 268             for(y=0; y<8; y++){
 269                 int a,b,c,d;
 270
 271                 a= dst[offset + 7 + y*stride] - dst[offset + 6 + y*stride];
 272                 b= dst[offset + 8 + y*stride] - dst[offset + 7 + y*stride];
 273                 c= dst[offset + 9 + y*stride] - dst[offset + 8 + y*stride];
 274
 275                 d= FFABS(b) - ((FFABS(a) + FFABS(c) + 1)>>1);
 276                 d= FFMAX(d, 0);
 277                 if(b<0) d= -d;
 278
 279                 if(d==0) continue;
 280
 281                 if(!(left_damage && right_damage))
 282                     d= d*16/9;
 283
 284                 if(left_damage){
 285                     dst[offset + 7 + y*stride] = cm[dst[offset + 7 + y*stride] + ((d*7)>>4)];
 286                     dst[offset + 6 + y*stride] = cm[dst[offset + 6 + y*stride] + ((d*5)>>4)];
 287                     dst[offset + 5 + y*stride] = cm[dst[offset + 5 + y*stride] + ((d*3)>>4)];
 288                     dst[offset + 4 + y*stride] = cm[dst[offset + 4 + y*stride] + ((d*1)>>4)];
 289                 }
 290                 if(right_damage){
 291                     dst[offset + 8 + y*stride] = cm[dst[offset + 8 + y*stride] - ((d*7)>>4)];
 292                     dst[offset + 9 + y*stride] = cm[dst[offset + 9 + y*stride] - ((d*5)>>4)];
 293                     dst[offset + 10+ y*stride] = cm[dst[offset +10 + y*stride] - ((d*3)>>4)];
 294                     dst[offset + 11+ y*stride] = cm[dst[offset +11 + y*stride] - ((d*1)>>4)];
 295                 }
 296             }
 297         }
 298     }
 299 }
 300
 301 /**
 302  * simple vertical deblocking filter used for error resilience
 303  * @param w     width in 8 pixel blocks
 304  * @param h     height in 8 pixel blocks
 305  */
 306 static void v_block_filter(MpegEncContext *s, uint8_t *dst, int w, int h, int stride, int is_luma){
 307     int b_x, b_y, mvx_stride, mvy_stride;
 308     uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
 309     set_mv_strides(s, &mvx_stride, &mvy_stride);
 310     mvx_stride >>= is_luma;
 311     mvy_stride *= mvx_stride;
 312
 313     for(b_y=0; b_y<h-1; b_y++){
 314         for(b_x=0; b_x<w; b_x++){
 315             int x;
 316             int top_status   = s->error_status_table[(b_x>>is_luma) + ( b_y   >>is_luma)*s->mb_stride];
 317             int bottom_status= s->error_status_table[(b_x>>is_luma) + ((b_y+1)>>is_luma)*s->mb_stride];
 318             int top_intra    = IS_INTRA(s->current_picture.f.mb_type[(b_x >> is_luma) + ( b_y      >> is_luma) * s->mb_stride]);
 319             int bottom_intra = IS_INTRA(s->current_picture.f.mb_type[(b_x >> is_luma) + ((b_y + 1) >> is_luma) * s->mb_stride]);
 320             int top_damage =      top_status&ER_MB_ERROR;
 321             int bottom_damage= bottom_status&ER_MB_ERROR;
 322             int offset= b_x*8 + b_y*stride*8;
 323             int16_t *top_mv    = s->current_picture.f.motion_val[0][mvy_stride *  b_y      + mvx_stride * b_x];
 324             int16_t *bottom_mv = s->current_picture.f.motion_val[0][mvy_stride * (b_y + 1) + mvx_stride * b_x];
 325
 326             if(!(top_damage||bottom_damage)) continue; // both undamaged
 327
 328             if(   (!top_intra) && (!bottom_intra)
 329                && FFABS(top_mv[0]-bottom_mv[0]) + FFABS(top_mv[1]+bottom_mv[1]) < 2) continue;
 330
 331             for(x=0; x<8; x++){
 332                 int a,b,c,d;
 333
 334                 a= dst[offset + x + 7*stride] - dst[offset + x + 6*stride];
 335                 b= dst[offset + x + 8*stride] - dst[offset + x + 7*stride];
 336                 c= dst[offset + x + 9*stride] - dst[offset + x + 8*stride];
 337
 338                 d= FFABS(b) - ((FFABS(a) + FFABS(c)+1)>>1);
 339                 d= FFMAX(d, 0);
 340                 if(b<0) d= -d;
 341
 342                 if(d==0) continue;
 343
 344                 if(!(top_damage && bottom_damage))
 345                     d= d*16/9;
 346
 347                 if(top_damage){
 348                     dst[offset + x +  7*stride] = cm[dst[offset + x +  7*stride] + ((d*7)>>4)];
 349                     dst[offset + x +  6*stride] = cm[dst[offset + x +  6*stride] + ((d*5)>>4)];
 350                     dst[offset + x +  5*stride] = cm[dst[offset + x +  5*stride] + ((d*3)>>4)];
 351                     dst[offset + x +  4*stride] = cm[dst[offset + x +  4*stride] + ((d*1)>>4)];
 352                 }
 353                 if(bottom_damage){
 354                     dst[offset + x +  8*stride] = cm[dst[offset + x +  8*stride] - ((d*7)>>4)];
 355                     dst[offset + x +  9*stride] = cm[dst[offset + x +  9*stride] - ((d*5)>>4)];
 356                     dst[offset + x + 10*stride] = cm[dst[offset + x + 10*stride] - ((d*3)>>4)];
 357                     dst[offset + x + 11*stride] = cm[dst[offset + x + 11*stride] - ((d*1)>>4)];
 358                 }
 359             }
 360         }
 361     }
 362 }
 363
 364 static void guess_mv(MpegEncContext *s){
 365     uint8_t fixed[s->mb_stride * s->mb_height];
 366 #define MV_FROZEN    3
 367 #define MV_CHANGED   2
 368 #define MV_UNCHANGED 1
 369     const int mb_stride = s->mb_stride;
 370     const int mb_width = s->mb_width;
 371     const int mb_height= s->mb_height;
 372     int i, depth, num_avail;
 373     int mb_x, mb_y, mot_step, mot_stride;
 374
 375     set_mv_strides(s, &mot_step, &mot_stride);
 376
 377     num_avail=0;
 378     for(i=0; i<s->mb_num; i++){
 379         const int mb_xy= s->mb_index2xy[ i ];
 380         int f=0;
 381         int error= s->error_status_table[mb_xy];
 382
 383         if(IS_INTRA(s->current_picture.f.mb_type[mb_xy])) f=MV_FROZEN; //intra //FIXME check
 384         if(!(error&ER_MV_ERROR)) f=MV_FROZEN;           //inter with undamaged MV
 385
 386         fixed[mb_xy]= f;
 387         if(f==MV_FROZEN)
 388             num_avail++;
 389     }
 390
 391     if((!(s->avctx->error_concealment&FF_EC_GUESS_MVS)) || num_avail <= mb_width/2){
 392         for(mb_y=0; mb_y<s->mb_height; mb_y++){
 393             for(mb_x=0; mb_x<s->mb_width; mb_x++){
 394                 const int mb_xy= mb_x + mb_y*s->mb_stride;
 395
 396                 if(IS_INTRA(s->current_picture.f.mb_type[mb_xy]))  continue;
 397                 if(!(s->error_status_table[mb_xy]&ER_MV_ERROR)) continue;
 398
 399                 s->mv_dir = s->last_picture.f.data[0] ? MV_DIR_FORWARD : MV_DIR_BACKWARD;
 400                 s->mb_intra=0;
 401                 s->mv_type = MV_TYPE_16X16;
 402                 s->mb_skipped=0;
 403
 404                 s->dsp.clear_blocks(s->block[0]);
 405
 406                 s->mb_x= mb_x;
 407                 s->mb_y= mb_y;
 408                 s->mv[0][0][0]= 0;
 409                 s->mv[0][0][1]= 0;
 410                 decode_mb(s, 0);
 411             }
 412         }
 413         return;
 414     }
 415
 416     for(depth=0;; depth++){
 417         int changed, pass, none_left;
 418
 419         none_left=1;
 420         changed=1;
 421         for(pass=0; (changed || pass<2) && pass<10; pass++){
 422             int mb_x, mb_y;
 423 int score_sum=0;
 424
 425             changed=0;
 426             for(mb_y=0; mb_y<s->mb_height; mb_y++){
 427                 for(mb_x=0; mb_x<s->mb_width; mb_x++){
 428                     const int mb_xy= mb_x + mb_y*s->mb_stride;
 429                     int mv_predictor[8][2]={{0}};
 430                     int ref[8]={0};
 431                     int pred_count=0;
 432                     int j;
 433                     int best_score=256*256*256*64;
 434                     int best_pred=0;
 435                     const int mot_index= (mb_x + mb_y*mot_stride) * mot_step;
 436                     int prev_x, prev_y, prev_ref;
 437
 438                     if((mb_x^mb_y^pass)&1) continue;
 439
 440                     if(fixed[mb_xy]==MV_FROZEN) continue;
 441                     assert(!IS_INTRA(s->current_picture.f.mb_type[mb_xy]));
 442                     assert(s->last_picture_ptr && s->last_picture_ptr->f.data[0]);
 443
 444                     j=0;
 445                     if(mb_x>0           && fixed[mb_xy-1        ]==MV_FROZEN) j=1;
 446                     if(mb_x+1<mb_width  && fixed[mb_xy+1        ]==MV_FROZEN) j=1;
 447                     if(mb_y>0           && fixed[mb_xy-mb_stride]==MV_FROZEN) j=1;
 448                     if(mb_y+1<mb_height && fixed[mb_xy+mb_stride]==MV_FROZEN) j=1;
 449                     if(j==0) continue;
 450
 451                     j=0;
 452                     if(mb_x>0           && fixed[mb_xy-1        ]==MV_CHANGED) j=1;
 453                     if(mb_x+1<mb_width  && fixed[mb_xy+1        ]==MV_CHANGED) j=1;
 454                     if(mb_y>0           && fixed[mb_xy-mb_stride]==MV_CHANGED) j=1;
 455                     if(mb_y+1<mb_height && fixed[mb_xy+mb_stride]==MV_CHANGED) j=1;
 456                     if(j==0 && pass>1) continue;
 457
 458                     none_left=0;
 459
 460                     if(mb_x>0 && fixed[mb_xy-1]){
 461                         mv_predictor[pred_count][0]= s->current_picture.f.motion_val[0][mot_index - mot_step][0];
 462                         mv_predictor[pred_count][1]= s->current_picture.f.motion_val[0][mot_index - mot_step][1];
 463                         ref         [pred_count]   = s->current_picture.f.ref_index[0][4*(mb_xy-1)];
 464                         pred_count++;
 465                     }
 466                     if(mb_x+1<mb_width && fixed[mb_xy+1]){
 467                         mv_predictor[pred_count][0]= s->current_picture.f.motion_val[0][mot_index + mot_step][0];
 468                         mv_predictor[pred_count][1]= s->current_picture.f.motion_val[0][mot_index + mot_step][1];
 469                         ref         [pred_count]   = s->current_picture.f.ref_index[0][4*(mb_xy+1)];
 470                         pred_count++;
 471                     }
 472                     if(mb_y>0 && fixed[mb_xy-mb_stride]){
 473                         mv_predictor[pred_count][0]= s->current_picture.f.motion_val[0][mot_index - mot_stride*mot_step][0];
 474                         mv_predictor[pred_count][1]= s->current_picture.f.motion_val[0][mot_index - mot_stride*mot_step][1];
 475                         ref         [pred_count]   = s->current_picture.f.ref_index[0][4*(mb_xy-s->mb_stride)];
 476                         pred_count++;
 477                     }
 478                     if(mb_y+1<mb_height && fixed[mb_xy+mb_stride]){
 479                         mv_predictor[pred_count][0]= s->current_picture.f.motion_val[0][mot_index + mot_stride*mot_step][0];
 480                         mv_predictor[pred_count][1]= s->current_picture.f.motion_val[0][mot_index + mot_stride*mot_step][1];
 481                         ref         [pred_count]   = s->current_picture.f.ref_index[0][4*(mb_xy+s->mb_stride)];
 482                         pred_count++;
 483                     }
 484                     if(pred_count==0) continue;
 485
 486                     if(pred_count>1){
 487                         int sum_x=0, sum_y=0, sum_r=0;
 488                         int max_x, max_y, min_x, min_y, max_r, min_r;
 489
 490                         for(j=0; j<pred_count; j++){
 491                             sum_x+= mv_predictor[j][0];
 492                             sum_y+= mv_predictor[j][1];
 493                             sum_r+= ref[j];
 494                             if(j && ref[j] != ref[j-1])
 495                                 goto skip_mean_and_median;
 496                         }
 497
 498                         /* mean */
 499                         mv_predictor[pred_count][0] = sum_x/j;
 500                         mv_predictor[pred_count][1] = sum_y/j;
 501                         ref         [pred_count]    = sum_r/j;
 502
 503                         /* median */
 504                         if(pred_count>=3){
 505                             min_y= min_x= min_r= 99999;
 506                             max_y= max_x= max_r=-99999;
 507                         }else{
 508                             min_x=min_y=max_x=max_y=min_r=max_r=0;
 509                         }
 510                         for(j=0; j<pred_count; j++){
 511                             max_x= FFMAX(max_x, mv_predictor[j][0]);
 512                             max_y= FFMAX(max_y, mv_predictor[j][1]);
 513                             max_r= FFMAX(max_r, ref[j]);
 514                             min_x= FFMIN(min_x, mv_predictor[j][0]);
 515                             min_y= FFMIN(min_y, mv_predictor[j][1]);
 516                             min_r= FFMIN(min_r, ref[j]);
 517                         }
 518                         mv_predictor[pred_count+1][0] = sum_x - max_x - min_x;
 519                         mv_predictor[pred_count+1][1] = sum_y - max_y - min_y;
 520                         ref         [pred_count+1]    = sum_r - max_r - min_r;
 521
 522                         if(pred_count==4){
 523                             mv_predictor[pred_count+1][0] /= 2;
 524                             mv_predictor[pred_count+1][1] /= 2;
 525                             ref         [pred_count+1]    /= 2;
 526                         }
 527                         pred_count+=2;
 528                     }
 529 skip_mean_and_median:
 530
 531                     /* zero MV */
 532                     pred_count++;
 533
 534                     if (!fixed[mb_xy]) {
 535                         if (s->avctx->codec_id == CODEC_ID_H264) {
 536                             // FIXME
 537                         } else {
 538                             ff_thread_await_progress((AVFrame *) s->last_picture_ptr,
 539                                                      mb_y, 0);
 540                         }
 541                         if (!s->last_picture.f.motion_val[0] ||
 542                             !s->last_picture.f.ref_index[0])
 543                             goto skip_last_mv;
 544                         prev_x = s->last_picture.f.motion_val[0][mot_index][0];
 545                         prev_y = s->last_picture.f.motion_val[0][mot_index][1];
 546                         prev_ref = s->last_picture.f.ref_index[0][4*mb_xy];
 547                     } else {
 548                         prev_x = s->current_picture.f.motion_val[0][mot_index][0];
 549                         prev_y = s->current_picture.f.motion_val[0][mot_index][1];
 550                         prev_ref = s->current_picture.f.ref_index[0][4*mb_xy];
 551                     }
 552
 553                     /* last MV */
 554                     mv_predictor[pred_count][0]= prev_x;
 555                     mv_predictor[pred_count][1]= prev_y;
 556                     ref         [pred_count]   = prev_ref;
 557                     pred_count++;
 558                 skip_last_mv:
 559
 560                     s->mv_dir = MV_DIR_FORWARD;
 561                     s->mb_intra=0;
 562                     s->mv_type = MV_TYPE_16X16;
 563                     s->mb_skipped=0;
 564
 565                     s->dsp.clear_blocks(s->block[0]);
 566
 567                     s->mb_x= mb_x;
 568                     s->mb_y= mb_y;
 569
 570                     for(j=0; j<pred_count; j++){
 571                         int score=0;
 572                         uint8_t *src = s->current_picture.f.data[0] + mb_x*16 + mb_y*16*s->linesize;
 573
 574                         s->current_picture.f.motion_val[0][mot_index][0] = s->mv[0][0][0] = mv_predictor[j][0];
 575                         s->current_picture.f.motion_val[0][mot_index][1] = s->mv[0][0][1] = mv_predictor[j][1];
 576
 577                         if(ref[j]<0) //predictor intra or otherwise not available
 578                             continue;
 579
 580                         decode_mb(s, ref[j]);
 581
 582                         if(mb_x>0 && fixed[mb_xy-1]){
 583                             int k;
 584                             for(k=0; k<16; k++)
 585                                 score += FFABS(src[k*s->linesize-1 ]-src[k*s->linesize   ]);
 586                         }
 587                         if(mb_x+1<mb_width && fixed[mb_xy+1]){
 588                             int k;
 589                             for(k=0; k<16; k++)
 590                                 score += FFABS(src[k*s->linesize+15]-src[k*s->linesize+16]);
 591                         }
 592                         if(mb_y>0 && fixed[mb_xy-mb_stride]){
 593                             int k;
 594                             for(k=0; k<16; k++)
 595                                 score += FFABS(src[k-s->linesize   ]-src[k               ]);
 596                         }
 597                         if(mb_y+1<mb_height && fixed[mb_xy+mb_stride]){
 598                             int k;
 599                             for(k=0; k<16; k++)
 600                                 score += FFABS(src[k+s->linesize*15]-src[k+s->linesize*16]);
 601                         }
 602
 603                         if(score <= best_score){ // <= will favor the last MV
 604                             best_score= score;
 605                             best_pred= j;
 606                         }
 607                     }
 608 score_sum+= best_score;
 609                     s->mv[0][0][0]= mv_predictor[best_pred][0];
 610                     s->mv[0][0][1]= mv_predictor[best_pred][1];
 611
 612                     for(i=0; i<mot_step; i++)
 613                         for(j=0; j<mot_step; j++){
 614                             s->current_picture.f.motion_val[0][mot_index + i + j * mot_stride][0] = s->mv[0][0][0];
 615                             s->current_picture.f.motion_val[0][mot_index + i + j * mot_stride][1] = s->mv[0][0][1];
 616                         }
 617
 618                     decode_mb(s, ref[best_pred]);
 619
 620
 621                     if(s->mv[0][0][0] != prev_x || s->mv[0][0][1] != prev_y){
 622                         fixed[mb_xy]=MV_CHANGED;
 623                         changed++;
 624                     }else
 625                         fixed[mb_xy]=MV_UNCHANGED;
 626                 }
 627             }
 628
 629 //            printf(".%d/%d", changed, score_sum); fflush(stdout);
 630         }
 631
 632         if(none_left)
 633             return;
 634
 635         for(i=0; i<s->mb_num; i++){
 636             int mb_xy= s->mb_index2xy[i];
 637             if(fixed[mb_xy])
 638                 fixed[mb_xy]=MV_FROZEN;
 639         }
 640 //        printf(":"); fflush(stdout);
 641     }
 642 }
 643
 644 static int is_intra_more_likely(MpegEncContext *s){
 645     int is_intra_likely, i, j, undamaged_count, skip_amount, mb_x, mb_y;
 646
 647     if (!s->last_picture_ptr || !s->last_picture_ptr->f.data[0]) return 1; //no previous frame available -> use spatial prediction
 648
 649     undamaged_count=0;
 650     for(i=0; i<s->mb_num; i++){
 651         const int mb_xy= s->mb_index2xy[i];
 652         const int error= s->error_status_table[mb_xy];
 653         if(!((error&ER_DC_ERROR) && (error&ER_MV_ERROR)))
 654             undamaged_count++;
 655     }
 656
 657     if(s->codec_id == CODEC_ID_H264){
 658         H264Context *h= (void*)s;
 659         if (h->list_count <= 0 || h->ref_count[0] <= 0 || !h->ref_list[0][0].f.data[0])
 660             return 1;
 661     }
 662
 663     if(undamaged_count < 5) return 0; //almost all MBs damaged -> use temporal prediction
 664
 665     //prevent dsp.sad() check, that requires access to the image
 666     if(CONFIG_MPEG_XVMC_DECODER && s->avctx->xvmc_acceleration && s->pict_type == AV_PICTURE_TYPE_I)
 667         return 1;
 668
 669     skip_amount = FFMAX(undamaged_count / 50, 1); // check only up to 50 MBs
 670     is_intra_likely=0;
 671
 672     j=0;
 673     for(mb_y= 0; mb_y<s->mb_height-1; mb_y++){
 674         for(mb_x= 0; mb_x<s->mb_width; mb_x++){
 675             int error;
 676             const int mb_xy= mb_x + mb_y*s->mb_stride;
 677
 678             error= s->error_status_table[mb_xy];
 679             if((error&ER_DC_ERROR) && (error&ER_MV_ERROR))
 680                 continue; //skip damaged
 681
 682             j++;
 683             if((j%skip_amount) != 0) continue; //skip a few to speed things up
 684
 685             if(s->pict_type==AV_PICTURE_TYPE_I){
 686                 uint8_t *mb_ptr     = s->current_picture.f.data[0] + mb_x*16 + mb_y*16*s->linesize;
 687                 uint8_t *last_mb_ptr= s->last_picture.f.data   [0] + mb_x*16 + mb_y*16*s->linesize;
 688
 689                 if (s->avctx->codec_id == CODEC_ID_H264) {
 690                     // FIXME
 691                 } else {
 692                     ff_thread_await_progress((AVFrame *) s->last_picture_ptr,
 693                                              mb_y, 0);
 694                 }
 695                 is_intra_likely += s->dsp.sad[0](NULL, last_mb_ptr, mb_ptr                    , s->linesize, 16);
 696                 is_intra_likely -= s->dsp.sad[0](NULL, last_mb_ptr, last_mb_ptr+s->linesize*16, s->linesize, 16);
 697             }else{
 698                 if (IS_INTRA(s->current_picture.f.mb_type[mb_xy]))
 699                    is_intra_likely++;
 700                 else
 701                    is_intra_likely--;
 702             }
 703         }
 704     }
 705 //printf("is_intra_likely: %d type:%d\n", is_intra_likely, s->pict_type);
 706     return is_intra_likely > 0;
 707 }
 708
 709 void ff_er_frame_start(MpegEncContext *s){
 710     if(!s->err_recognition) return;
 711
 712     memset(s->error_status_table, ER_MB_ERROR|VP_START|ER_MB_END, s->mb_stride*s->mb_height*sizeof(uint8_t));
 713     s->error_count= 3*s->mb_num;
 714     s->error_occurred = 0;
 715 }
 716
 717 /**
 718  * Add a slice.
 719  * @param endx x component of the last macroblock, can be -1 for the last of the previous line
 720  * @param status the status at the end (ER_MV_END, ER_AC_ERROR, ...), it is assumed that no earlier end or
 721  *               error of the same type occurred
 722  */
 723 void ff_er_add_slice(MpegEncContext *s, int startx, int starty, int endx, int endy, int status){
 724     const int start_i= av_clip(startx + starty * s->mb_width    , 0, s->mb_num-1);
 725     const int end_i  = av_clip(endx   + endy   * s->mb_width    , 0, s->mb_num);
 726     const int start_xy= s->mb_index2xy[start_i];
 727     const int end_xy  = s->mb_index2xy[end_i];
 728     int mask= -1;
 729
 730     if(s->avctx->hwaccel)
 731         return;
 732
 733     if(start_i > end_i || start_xy > end_xy){
 734         av_log(s->avctx, AV_LOG_ERROR, "internal error, slice end before start\n");
 735         return;
 736     }
 737
 738     if(!s->err_recognition) return;
 739
 740     mask &= ~VP_START;
 741     if(status & (ER_AC_ERROR|ER_AC_END)){
 742         mask &= ~(ER_AC_ERROR|ER_AC_END);
 743         s->error_count -= end_i - start_i + 1;
 744     }
 745     if(status & (ER_DC_ERROR|ER_DC_END)){
 746         mask &= ~(ER_DC_ERROR|ER_DC_END);
 747         s->error_count -= end_i - start_i + 1;
 748     }
 749     if(status & (ER_MV_ERROR|ER_MV_END)){
 750         mask &= ~(ER_MV_ERROR|ER_MV_END);
 751         s->error_count -= end_i - start_i + 1;
 752     }
 753
 754     if(status & ER_MB_ERROR) {
 755         s->error_occurred = 1;
 756         s->error_count= INT_MAX;
 757     }
 758
 759     if(mask == ~0x7F){
 760         memset(&s->error_status_table[start_xy], 0, (end_xy - start_xy) * sizeof(uint8_t));
 761     }else{
 762         int i;
 763         for(i=start_xy; i<end_xy; i++){
 764             s->error_status_table[ i ] &= mask;
 765         }
 766     }
 767
 768     if(end_i == s->mb_num)
 769         s->error_count= INT_MAX;
 770     else{
 771         s->error_status_table[end_xy] &= mask;
 772         s->error_status_table[end_xy] |= status;
 773     }
 774
 775     s->error_status_table[start_xy] |= VP_START;
 776
 777     if(start_xy > 0 && s->avctx->thread_count <= 1 && s->avctx->skip_top*s->mb_width < start_i){
 778         int prev_status= s->error_status_table[ s->mb_index2xy[start_i - 1] ];
 779
 780         prev_status &= ~ VP_START;
 781         if(prev_status != (ER_MV_END|ER_DC_END|ER_AC_END)) s->error_count= INT_MAX;
 782     }
 783 }
 784
 785 void ff_er_frame_end(MpegEncContext *s){
 786     int i, mb_x, mb_y, error, error_type, dc_error, mv_error, ac_error;
 787     int distance;
 788     int threshold_part[4]= {100,100,100};
 789     int threshold= 50;
 790     int is_intra_likely;
 791     int size = s->b8_stride * 2 * s->mb_height;
 792     Picture *pic= s->current_picture_ptr;
 793
 794     if(!s->err_recognition || s->error_count==0 || s->avctx->lowres ||
 795        s->avctx->hwaccel ||
 796        s->avctx->codec->capabilities&CODEC_CAP_HWACCEL_VDPAU ||
 797        s->picture_structure != PICT_FRAME || // we do not support ER of field pictures yet, though it should not crash if enabled
 798        s->error_count==3*s->mb_width*(s->avctx->skip_top + s->avctx->skip_bottom)) return;
 799
 800     if (s->current_picture.f.motion_val[0] == NULL) {
 801         av_log(s->avctx, AV_LOG_ERROR, "Warning MVs not available\n");
 802
 803         for(i=0; i<2; i++){
 804             pic->f.ref_index[i] = av_mallocz(s->mb_stride * s->mb_height * 4 * sizeof(uint8_t));
 805             pic->motion_val_base[i]= av_mallocz((size+4) * 2 * sizeof(uint16_t));
 806             pic->f.motion_val[i] = pic->motion_val_base[i] + 4;
 807         }
 808         pic->f.motion_subsample_log2 = 3;
 809         s->current_picture= *s->current_picture_ptr;
 810     }
 811
 812     if(s->avctx->debug&FF_DEBUG_ER){
 813         for(mb_y=0; mb_y<s->mb_height; mb_y++){
 814             for(mb_x=0; mb_x<s->mb_width; mb_x++){
 815                 int status= s->error_status_table[mb_x + mb_y*s->mb_stride];
 816
 817                 av_log(s->avctx, AV_LOG_DEBUG, "%2X ", status);
 818             }
 819             av_log(s->avctx, AV_LOG_DEBUG, "\n");
 820         }
 821     }
 822
 823     /* handle overlapping slices */
 824     for(error_type=1; error_type<=3; error_type++){
 825         int end_ok=0;
 826
 827         for(i=s->mb_num-1; i>=0; i--){
 828             const int mb_xy= s->mb_index2xy[i];
 829             int error= s->error_status_table[mb_xy];
 830
 831             if(error&(1<<error_type))
 832                 end_ok=1;
 833             if(error&(8<<error_type))
 834                 end_ok=1;
 835
 836             if(!end_ok)
 837                 s->error_status_table[mb_xy]|= 1<<error_type;
 838
 839             if(error&VP_START)
 840                 end_ok=0;
 841         }
 842     }
 843
 844     /* handle slices with partitions of different length */
 845     if(s->partitioned_frame){
 846         int end_ok=0;
 847
 848         for(i=s->mb_num-1; i>=0; i--){
 849             const int mb_xy= s->mb_index2xy[i];
 850             int error= s->error_status_table[mb_xy];
 851
 852             if(error&ER_AC_END)
 853                 end_ok=0;
 854             if((error&ER_MV_END) || (error&ER_DC_END) || (error&ER_AC_ERROR))
 855                 end_ok=1;
 856
 857             if(!end_ok)
 858                 s->error_status_table[mb_xy]|= ER_AC_ERROR;
 859
 860             if(error&VP_START)
 861                 end_ok=0;
 862         }
 863     }
 864
 865     /* handle missing slices */
 866     if(s->err_recognition&AV_EF_EXPLODE){
 867         int end_ok=1;
 868
 869         for(i=s->mb_num-2; i>=s->mb_width+100; i--){ //FIXME +100 hack
 870             const int mb_xy= s->mb_index2xy[i];
 871             int error1= s->error_status_table[mb_xy  ];
 872             int error2= s->error_status_table[s->mb_index2xy[i+1]];
 873
 874             if(error1&VP_START)
 875                 end_ok=1;
 876
 877             if(   error2==(VP_START|ER_MB_ERROR|ER_MB_END)
 878                && error1!=(VP_START|ER_MB_ERROR|ER_MB_END)
 879                && ((error1&ER_AC_END) || (error1&ER_DC_END) || (error1&ER_MV_END))){ //end & uninit
 880                 end_ok=0;
 881             }
 882
 883             if(!end_ok)
 884                 s->error_status_table[mb_xy]|= ER_MB_ERROR;
 885         }
 886     }
 887
 888     /* backward mark errors */
 889     distance=9999999;
 890     for(error_type=1; error_type<=3; error_type++){
 891         for(i=s->mb_num-1; i>=0; i--){
 892             const int mb_xy= s->mb_index2xy[i];
 893             int error= s->error_status_table[mb_xy];
 894
 895             if(!s->mbskip_table[mb_xy]) //FIXME partition specific
 896                 distance++;
 897             if(error&(1<<error_type))
 898                 distance= 0;
 899
 900             if(s->partitioned_frame){
 901                 if(distance < threshold_part[error_type-1])
 902                     s->error_status_table[mb_xy]|= 1<<error_type;
 903             }else{
 904                 if(distance < threshold)
 905                     s->error_status_table[mb_xy]|= 1<<error_type;
 906             }
 907
 908             if(error&VP_START)
 909                 distance= 9999999;
 910         }
 911     }
 912
 913     /* forward mark errors */
 914     error=0;
 915     for(i=0; i<s->mb_num; i++){
 916         const int mb_xy= s->mb_index2xy[i];
 917         int old_error= s->error_status_table[mb_xy];
 918
 919         if(old_error&VP_START)
 920             error= old_error& ER_MB_ERROR;
 921         else{
 922             error|= old_error& ER_MB_ERROR;
 923             s->error_status_table[mb_xy]|= error;
 924         }
 925     }
 926
 927     /* handle not partitioned case */
 928     if(!s->partitioned_frame){
 929         for(i=0; i<s->mb_num; i++){
 930             const int mb_xy= s->mb_index2xy[i];
 931             error= s->error_status_table[mb_xy];
 932             if(error&ER_MB_ERROR)
 933                 error|= ER_MB_ERROR;
 934             s->error_status_table[mb_xy]= error;
 935         }
 936     }
 937
 938     dc_error= ac_error= mv_error=0;
 939     for(i=0; i<s->mb_num; i++){
 940         const int mb_xy= s->mb_index2xy[i];
 941         error= s->error_status_table[mb_xy];
 942         if(error&ER_DC_ERROR) dc_error ++;
 943         if(error&ER_AC_ERROR) ac_error ++;
 944         if(error&ER_MV_ERROR) mv_error ++;
 945     }
 946     av_log(s->avctx, AV_LOG_INFO, "concealing %d DC, %d AC, %d MV errors\n", dc_error, ac_error, mv_error);
 947
 948     is_intra_likely= is_intra_more_likely(s);
 949
 950     /* set unknown mb-type to most likely */
 951     for(i=0; i<s->mb_num; i++){
 952         const int mb_xy= s->mb_index2xy[i];
 953         error= s->error_status_table[mb_xy];
 954         if(!((error&ER_DC_ERROR) && (error&ER_MV_ERROR)))
 955             continue;
 956
 957         if(is_intra_likely)
 958             s->current_picture.f.mb_type[mb_xy] = MB_TYPE_INTRA4x4;
 959         else
 960             s->current_picture.f.mb_type[mb_xy] = MB_TYPE_16x16 | MB_TYPE_L0;
 961     }
 962
 963     // change inter to intra blocks if no reference frames are available
 964     if (!s->last_picture.f.data[0] && !s->next_picture.f.data[0])
 965         for(i=0; i<s->mb_num; i++){
 966             const int mb_xy= s->mb_index2xy[i];
 967             if (!IS_INTRA(s->current_picture.f.mb_type[mb_xy]))
 968                 s->current_picture.f.mb_type[mb_xy] = MB_TYPE_INTRA4x4;
 969         }
 970
 971     /* handle inter blocks with damaged AC */
 972     for(mb_y=0; mb_y<s->mb_height; mb_y++){
 973         for(mb_x=0; mb_x<s->mb_width; mb_x++){
 974             const int mb_xy= mb_x + mb_y * s->mb_stride;
 975             const int mb_type= s->current_picture.f.mb_type[mb_xy];
 976             int dir = !s->last_picture.f.data[0];
 977             error= s->error_status_table[mb_xy];
 978
 979             if(IS_INTRA(mb_type)) continue; //intra
 980             if(error&ER_MV_ERROR) continue;              //inter with damaged MV
 981             if(!(error&ER_AC_ERROR)) continue;           //undamaged inter
 982
 983             s->mv_dir = dir ? MV_DIR_BACKWARD : MV_DIR_FORWARD;
 984             s->mb_intra=0;
 985             s->mb_skipped=0;
 986             if(IS_8X8(mb_type)){
 987                 int mb_index= mb_x*2 + mb_y*2*s->b8_stride;
 988                 int j;
 989                 s->mv_type = MV_TYPE_8X8;
 990                 for(j=0; j<4; j++){
 991                     s->mv[0][j][0] = s->current_picture.f.motion_val[dir][mb_index + (j & 1) + (j >> 1) * s->b8_stride][0];
 992                     s->mv[0][j][1] = s->current_picture.f.motion_val[dir][mb_index + (j & 1) + (j >> 1) * s->b8_stride][1];
 993                 }
 994             }else{
 995                 s->mv_type = MV_TYPE_16X16;
 996                 s->mv[0][0][0] = s->current_picture.f.motion_val[dir][ mb_x*2 + mb_y*2*s->b8_stride ][0];
 997                 s->mv[0][0][1] = s->current_picture.f.motion_val[dir][ mb_x*2 + mb_y*2*s->b8_stride ][1];
 998             }
 999
1000             s->dsp.clear_blocks(s->block[0]);
1001
1002             s->mb_x= mb_x;
1003             s->mb_y= mb_y;
1004             decode_mb(s, 0/*FIXME h264 partitioned slices need this set*/);
1005         }
1006     }
1007
1008     /* guess MVs */
1009     if(s->pict_type==AV_PICTURE_TYPE_B){
1010         for(mb_y=0; mb_y<s->mb_height; mb_y++){
1011             for(mb_x=0; mb_x<s->mb_width; mb_x++){
1012                 int xy= mb_x*2 + mb_y*2*s->b8_stride;
1013                 const int mb_xy= mb_x + mb_y * s->mb_stride;
1014                 const int mb_type= s->current_picture.f.mb_type[mb_xy];
1015                 error= s->error_status_table[mb_xy];
1016
1017                 if(IS_INTRA(mb_type)) continue;
1018                 if(!(error&ER_MV_ERROR)) continue;           //inter with undamaged MV
1019                 if(!(error&ER_AC_ERROR)) continue;           //undamaged inter
1020
1021                 s->mv_dir = MV_DIR_FORWARD|MV_DIR_BACKWARD;
1022                 if(!s->last_picture.f.data[0]) s->mv_dir &= ~MV_DIR_FORWARD;
1023                 if(!s->next_picture.f.data[0]) s->mv_dir &= ~MV_DIR_BACKWARD;
1024                 s->mb_intra=0;
1025                 s->mv_type = MV_TYPE_16X16;
1026                 s->mb_skipped=0;
1027
1028                 if(s->pp_time){
1029                     int time_pp= s->pp_time;
1030                     int time_pb= s->pb_time;
1031
1032                     if (s->avctx->codec_id == CODEC_ID_H264) {
1033                         //FIXME
1034                     } else {
1035                         ff_thread_await_progress((AVFrame *) s->next_picture_ptr,
1036                                                  mb_y, 0);
1037                     }
1038                     s->mv[0][0][0] = s->next_picture.f.motion_val[0][xy][0] *            time_pb  / time_pp;
1039                     s->mv[0][0][1] = s->next_picture.f.motion_val[0][xy][1] *            time_pb  / time_pp;
1040                     s->mv[1][0][0] = s->next_picture.f.motion_val[0][xy][0] * (time_pb - time_pp) / time_pp;
1041                     s->mv[1][0][1] = s->next_picture.f.motion_val[0][xy][1] * (time_pb - time_pp) / time_pp;
1042                 }else{
1043                     s->mv[0][0][0]= 0;
1044                     s->mv[0][0][1]= 0;
1045                     s->mv[1][0][0]= 0;
1046                     s->mv[1][0][1]= 0;
1047                 }
1048
1049                 s->dsp.clear_blocks(s->block[0]);
1050                 s->mb_x= mb_x;
1051                 s->mb_y= mb_y;
1052                 decode_mb(s, 0);
1053             }
1054         }
1055     }else
1056         guess_mv(s);
1057
1058     /* the filters below are not XvMC compatible, skip them */
1059     if(CONFIG_MPEG_XVMC_DECODER && s->avctx->xvmc_acceleration)
1060         goto ec_clean;
1061     /* fill DC for inter blocks */
1062     for(mb_y=0; mb_y<s->mb_height; mb_y++){
1063         for(mb_x=0; mb_x<s->mb_width; mb_x++){
1064             int dc, dcu, dcv, y, n;
1065             int16_t *dc_ptr;
1066             uint8_t *dest_y, *dest_cb, *dest_cr;
1067             const int mb_xy= mb_x + mb_y * s->mb_stride;
1068             const int mb_type = s->current_picture.f.mb_type[mb_xy];
1069
1070             error= s->error_status_table[mb_xy];
1071
1072             if(IS_INTRA(mb_type) && s->partitioned_frame) continue;
1073 //            if(error&ER_MV_ERROR) continue; //inter data damaged FIXME is this good?
1074
1075             dest_y  = s->current_picture.f.data[0] + mb_x * 16 + mb_y * 16 * s->linesize;
1076             dest_cb = s->current_picture.f.data[1] + mb_x *  8 + mb_y *  8 * s->uvlinesize;
1077             dest_cr = s->current_picture.f.data[2] + mb_x *  8 + mb_y *  8 * s->uvlinesize;
1078
1079             dc_ptr= &s->dc_val[0][mb_x*2 + mb_y*2*s->b8_stride];
1080             for(n=0; n<4; n++){
1081                 dc=0;
1082                 for(y=0; y<8; y++){
1083                     int x;
1084                     for(x=0; x<8; x++){
1085                        dc+= dest_y[x + (n&1)*8 + (y + (n>>1)*8)*s->linesize];
1086                     }
1087                 }
1088                 dc_ptr[(n&1) + (n>>1)*s->b8_stride]= (dc+4)>>3;
1089             }
1090
1091             dcu=dcv=0;
1092             for(y=0; y<8; y++){
1093                 int x;
1094                 for(x=0; x<8; x++){
1095                     dcu += dest_cb[x + y * s->uvlinesize];
1096                     dcv += dest_cr[x + y * s->uvlinesize];
1097                 }
1098             }
1099             s->dc_val[1][mb_x + mb_y*s->mb_stride]= (dcu+4)>>3;
1100             s->dc_val[2][mb_x + mb_y*s->mb_stride]= (dcv+4)>>3;
1101         }
1102     }
1103
1104     /* guess DC for damaged blocks */
1105     guess_dc(s, s->dc_val[0], s->mb_width*2, s->mb_height*2, s->b8_stride, 1);
1106     guess_dc(s, s->dc_val[1], s->mb_width  , s->mb_height  , s->mb_stride, 0);
1107     guess_dc(s, s->dc_val[2], s->mb_width  , s->mb_height  , s->mb_stride, 0);
1108
1109     /* filter luma DC */
1110     filter181(s->dc_val[0], s->mb_width*2, s->mb_height*2, s->b8_stride);
1111
1112     /* render DC only intra */
1113     for(mb_y=0; mb_y<s->mb_height; mb_y++){
1114         for(mb_x=0; mb_x<s->mb_width; mb_x++){
1115             uint8_t *dest_y, *dest_cb, *dest_cr;
1116             const int mb_xy= mb_x + mb_y * s->mb_stride;
1117             const int mb_type = s->current_picture.f.mb_type[mb_xy];
1118
1119             error= s->error_status_table[mb_xy];
1120
1121             if(IS_INTER(mb_type)) continue;
1122             if(!(error&ER_AC_ERROR)) continue;              //undamaged
1123
1124             dest_y  = s->current_picture.f.data[0] + mb_x * 16 + mb_y * 16 * s->linesize;
1125             dest_cb = s->current_picture.f.data[1] + mb_x *  8 + mb_y *  8 * s->uvlinesize;
1126             dest_cr = s->current_picture.f.data[2] + mb_x *  8 + mb_y *  8 * s->uvlinesize;
1127
1128             put_dc(s, dest_y, dest_cb, dest_cr, mb_x, mb_y);
1129         }
1130     }
1131
1132     if(s->avctx->error_concealment&FF_EC_DEBLOCK){
1133         /* filter horizontal block boundaries */
1134         h_block_filter(s, s->current_picture.f.data[0], s->mb_width*2, s->mb_height*2, s->linesize  , 1);
1135         h_block_filter(s, s->current_picture.f.data[1], s->mb_width  , s->mb_height  , s->uvlinesize, 0);
1136         h_block_filter(s, s->current_picture.f.data[2], s->mb_width  , s->mb_height  , s->uvlinesize, 0);
1137
1138         /* filter vertical block boundaries */
1139         v_block_filter(s, s->current_picture.f.data[0], s->mb_width*2, s->mb_height*2, s->linesize  , 1);
1140         v_block_filter(s, s->current_picture.f.data[1], s->mb_width  , s->mb_height  , s->uvlinesize, 0);
1141         v_block_filter(s, s->current_picture.f.data[2], s->mb_width  , s->mb_height  , s->uvlinesize, 0);
1142     }
1143
1144 ec_clean:
1145     /* clean a few tables */
1146     for(i=0; i<s->mb_num; i++){
1147         const int mb_xy= s->mb_index2xy[i];
1148         int error= s->error_status_table[mb_xy];
1149
1150         if(s->pict_type!=AV_PICTURE_TYPE_B && (error&(ER_DC_ERROR|ER_MV_ERROR|ER_AC_ERROR))){
1151             s->mbskip_table[mb_xy]=0;
1152         }
1153         s->mbintra_table[mb_xy]=1;
1154     }
1155 }