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 FFmpeg.
   7  *
   8  * FFmpeg 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  * FFmpeg 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 FFmpeg; 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 possible 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     int16_t  (*col )[4] = av_malloc(stride*h*sizeof( int16_t)*4);
 162     uint16_t (*dist)[4] = av_malloc(stride*h*sizeof(uint16_t)*4);
 163
 164     for(b_y=0; b_y<h; b_y++){
 165         int color= 1024;
 166         int distance= -1;
 167         for(b_x=0; b_x<w; b_x++){
 168             int mb_index_j= (b_x>>is_luma) + (b_y>>is_luma)*s->mb_stride;
 169             int error_j= s->error_status_table[mb_index_j];
 170             int intra_j = IS_INTRA(s->current_picture.f.mb_type[mb_index_j]);
 171             if(intra_j==0 || !(error_j&ER_DC_ERROR)){
 172                 color= dc[b_x + b_y*stride];
 173                 distance= b_x;
 174             }
 175             col [b_x + b_y*stride][1]= color;
 176             dist[b_x + b_y*stride][1]= distance >= 0 ? b_x-distance : 9999;
 177         }
 178         color= 1024;
 179         distance= -1;
 180         for(b_x=w-1; b_x>=0; b_x--){
 181             int mb_index_j= (b_x>>is_luma) + (b_y>>is_luma)*s->mb_stride;
 182             int error_j= s->error_status_table[mb_index_j];
 183             int intra_j = IS_INTRA(s->current_picture.f.mb_type[mb_index_j]);
 184             if(intra_j==0 || !(error_j&ER_DC_ERROR)){
 185                 color= dc[b_x + b_y*stride];
 186                 distance= b_x;
 187             }
 188             col [b_x + b_y*stride][0]= color;
 189             dist[b_x + b_y*stride][0]= distance >= 0 ? distance-b_x : 9999;
 190         }
 191     }
 192     for(b_x=0; b_x<w; b_x++){
 193         int color= 1024;
 194         int distance= -1;
 195         for(b_y=0; b_y<h; b_y++){
 196             int mb_index_j= (b_x>>is_luma) + (b_y>>is_luma)*s->mb_stride;
 197             int error_j= s->error_status_table[mb_index_j];
 198             int intra_j = IS_INTRA(s->current_picture.f.mb_type[mb_index_j]);
 199             if(intra_j==0 || !(error_j&ER_DC_ERROR)){
 200                 color= dc[b_x + b_y*stride];
 201                 distance= b_y;
 202             }
 203             col [b_x + b_y*stride][3]= color;
 204             dist[b_x + b_y*stride][3]= distance >= 0 ? b_y-distance : 9999;
 205         }
 206         color= 1024;
 207         distance= -1;
 208         for(b_y=h-1; b_y>=0; b_y--){
 209             int mb_index_j= (b_x>>is_luma) + (b_y>>is_luma)*s->mb_stride;
 210             int error_j= s->error_status_table[mb_index_j];
 211             int intra_j = IS_INTRA(s->current_picture.f.mb_type[mb_index_j]);
 212             if(intra_j==0 || !(error_j&ER_DC_ERROR)){
 213                 color= dc[b_x + b_y*stride];
 214                 distance= b_y;
 215             }
 216             col [b_x + b_y*stride][2]= color;
 217             dist[b_x + b_y*stride][2]= distance >= 0 ? distance-b_y : 9999;
 218         }
 219     }
 220
 221     for(b_y=0; b_y<h; b_y++){
 222         for(b_x=0; b_x<w; b_x++){
 223             int mb_index, error, j;
 224             int64_t guess, weight_sum;
 225
 226             mb_index= (b_x>>is_luma) + (b_y>>is_luma)*s->mb_stride;
 227
 228             error= s->error_status_table[mb_index];
 229
 230             if(IS_INTER(s->current_picture.f.mb_type[mb_index])) continue; //inter
 231             if(!(error&ER_DC_ERROR)) continue;           //dc-ok
 232
 233
 234             weight_sum=0;
 235             guess=0;
 236             for(j=0; j<4; j++){
 237                 int64_t weight= 256*256*256*16/dist[b_x + b_y*stride][j];
 238                 guess+= weight*(int64_t)col[b_x + b_y*stride][j];
 239                 weight_sum+= weight;
 240             }
 241             guess= (guess + weight_sum/2) / weight_sum;
 242
 243             dc[b_x + b_y*stride]= guess;
 244         }
 245     }
 246     av_freep(&col);
 247     av_freep(&dist);
 248 }
 249
 250 /**
 251  * simple horizontal deblocking filter used for error resilience
 252  * @param w     width in 8 pixel blocks
 253  * @param h     height in 8 pixel blocks
 254  */
 255 static void h_block_filter(MpegEncContext *s, uint8_t *dst, int w, int h, int stride, int is_luma){
 256     int b_x, b_y, mvx_stride, mvy_stride;
 257     uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
 258     set_mv_strides(s, &mvx_stride, &mvy_stride);
 259     mvx_stride >>= is_luma;
 260     mvy_stride *= mvx_stride;
 261
 262     for(b_y=0; b_y<h; b_y++){
 263         for(b_x=0; b_x<w-1; b_x++){
 264             int y;
 265             int left_status = s->error_status_table[( b_x   >>is_luma) + (b_y>>is_luma)*s->mb_stride];
 266             int right_status= s->error_status_table[((b_x+1)>>is_luma) + (b_y>>is_luma)*s->mb_stride];
 267             int left_intra  = IS_INTRA(s->current_picture.f.mb_type[( b_x      >> is_luma) + (b_y >> is_luma) * s->mb_stride]);
 268             int right_intra = IS_INTRA(s->current_picture.f.mb_type[((b_x + 1) >> is_luma) + (b_y >> is_luma) * s->mb_stride]);
 269             int left_damage =  left_status&ER_MB_ERROR;
 270             int right_damage= right_status&ER_MB_ERROR;
 271             int offset= b_x*8 + b_y*stride*8;
 272             int16_t *left_mv=  s->current_picture.f.motion_val[0][mvy_stride*b_y + mvx_stride* b_x   ];
 273             int16_t *right_mv= s->current_picture.f.motion_val[0][mvy_stride*b_y + mvx_stride*(b_x+1)];
 274
 275             if(!(left_damage||right_damage)) continue; // both undamaged
 276
 277             if(   (!left_intra) && (!right_intra)
 278                && FFABS(left_mv[0]-right_mv[0]) + FFABS(left_mv[1]+right_mv[1]) < 2) continue;
 279
 280             for(y=0; y<8; y++){
 281                 int a,b,c,d;
 282
 283                 a= dst[offset + 7 + y*stride] - dst[offset + 6 + y*stride];
 284                 b= dst[offset + 8 + y*stride] - dst[offset + 7 + y*stride];
 285                 c= dst[offset + 9 + y*stride] - dst[offset + 8 + y*stride];
 286
 287                 d= FFABS(b) - ((FFABS(a) + FFABS(c) + 1)>>1);
 288                 d= FFMAX(d, 0);
 289                 if(b<0) d= -d;
 290
 291                 if(d==0) continue;
 292
 293                 if(!(left_damage && right_damage))
 294                     d= d*16/9;
 295
 296                 if(left_damage){
 297                     dst[offset + 7 + y*stride] = cm[dst[offset + 7 + y*stride] + ((d*7)>>4)];
 298                     dst[offset + 6 + y*stride] = cm[dst[offset + 6 + y*stride] + ((d*5)>>4)];
 299                     dst[offset + 5 + y*stride] = cm[dst[offset + 5 + y*stride] + ((d*3)>>4)];
 300                     dst[offset + 4 + y*stride] = cm[dst[offset + 4 + y*stride] + ((d*1)>>4)];
 301                 }
 302                 if(right_damage){
 303                     dst[offset + 8 + y*stride] = cm[dst[offset + 8 + y*stride] - ((d*7)>>4)];
 304                     dst[offset + 9 + y*stride] = cm[dst[offset + 9 + y*stride] - ((d*5)>>4)];
 305                     dst[offset + 10+ y*stride] = cm[dst[offset +10 + y*stride] - ((d*3)>>4)];
 306                     dst[offset + 11+ y*stride] = cm[dst[offset +11 + y*stride] - ((d*1)>>4)];
 307                 }
 308             }
 309         }
 310     }
 311 }
 312
 313 /**
 314  * simple vertical deblocking filter used for error resilience
 315  * @param w     width in 8 pixel blocks
 316  * @param h     height in 8 pixel blocks
 317  */
 318 static void v_block_filter(MpegEncContext *s, uint8_t *dst, int w, int h, int stride, int is_luma){
 319     int b_x, b_y, mvx_stride, mvy_stride;
 320     uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
 321     set_mv_strides(s, &mvx_stride, &mvy_stride);
 322     mvx_stride >>= is_luma;
 323     mvy_stride *= mvx_stride;
 324
 325     for(b_y=0; b_y<h-1; b_y++){
 326         for(b_x=0; b_x<w; b_x++){
 327             int x;
 328             int top_status   = s->error_status_table[(b_x>>is_luma) + ( b_y   >>is_luma)*s->mb_stride];
 329             int bottom_status= s->error_status_table[(b_x>>is_luma) + ((b_y+1)>>is_luma)*s->mb_stride];
 330             int top_intra    = IS_INTRA(s->current_picture.f.mb_type[(b_x >> is_luma) + ( b_y      >> is_luma) * s->mb_stride]);
 331             int bottom_intra = IS_INTRA(s->current_picture.f.mb_type[(b_x >> is_luma) + ((b_y + 1) >> is_luma) * s->mb_stride]);
 332             int top_damage =      top_status&ER_MB_ERROR;
 333             int bottom_damage= bottom_status&ER_MB_ERROR;
 334             int offset= b_x*8 + b_y*stride*8;
 335             int16_t *top_mv    = s->current_picture.f.motion_val[0][mvy_stride *  b_y      + mvx_stride * b_x];
 336             int16_t *bottom_mv = s->current_picture.f.motion_val[0][mvy_stride * (b_y + 1) + mvx_stride * b_x];
 337
 338             if(!(top_damage||bottom_damage)) continue; // both undamaged
 339
 340             if(   (!top_intra) && (!bottom_intra)
 341                && FFABS(top_mv[0]-bottom_mv[0]) + FFABS(top_mv[1]+bottom_mv[1]) < 2) continue;
 342
 343             for(x=0; x<8; x++){
 344                 int a,b,c,d;
 345
 346                 a= dst[offset + x + 7*stride] - dst[offset + x + 6*stride];
 347                 b= dst[offset + x + 8*stride] - dst[offset + x + 7*stride];
 348                 c= dst[offset + x + 9*stride] - dst[offset + x + 8*stride];
 349
 350                 d= FFABS(b) - ((FFABS(a) + FFABS(c)+1)>>1);
 351                 d= FFMAX(d, 0);
 352                 if(b<0) d= -d;
 353
 354                 if(d==0) continue;
 355
 356                 if(!(top_damage && bottom_damage))
 357                     d= d*16/9;
 358
 359                 if(top_damage){
 360                     dst[offset + x +  7*stride] = cm[dst[offset + x +  7*stride] + ((d*7)>>4)];
 361                     dst[offset + x +  6*stride] = cm[dst[offset + x +  6*stride] + ((d*5)>>4)];
 362                     dst[offset + x +  5*stride] = cm[dst[offset + x +  5*stride] + ((d*3)>>4)];
 363                     dst[offset + x +  4*stride] = cm[dst[offset + x +  4*stride] + ((d*1)>>4)];
 364                 }
 365                 if(bottom_damage){
 366                     dst[offset + x +  8*stride] = cm[dst[offset + x +  8*stride] - ((d*7)>>4)];
 367                     dst[offset + x +  9*stride] = cm[dst[offset + x +  9*stride] - ((d*5)>>4)];
 368                     dst[offset + x + 10*stride] = cm[dst[offset + x + 10*stride] - ((d*3)>>4)];
 369                     dst[offset + x + 11*stride] = cm[dst[offset + x + 11*stride] - ((d*1)>>4)];
 370                 }
 371             }
 372         }
 373     }
 374 }
 375
 376 static void guess_mv(MpegEncContext *s){
 377     uint8_t *fixed = av_malloc(s->mb_stride * s->mb_height);
 378 #define MV_FROZEN    3
 379 #define MV_CHANGED   2
 380 #define MV_UNCHANGED 1
 381     const int mb_stride = s->mb_stride;
 382     const int mb_width = s->mb_width;
 383     const int mb_height= s->mb_height;
 384     int i, depth, num_avail;
 385     int mb_x, mb_y, mot_step, mot_stride;
 386
 387     set_mv_strides(s, &mot_step, &mot_stride);
 388
 389     num_avail=0;
 390     for(i=0; i<s->mb_num; i++){
 391         const int mb_xy= s->mb_index2xy[ i ];
 392         int f=0;
 393         int error= s->error_status_table[mb_xy];
 394
 395         if(IS_INTRA(s->current_picture.f.mb_type[mb_xy])) f=MV_FROZEN; //intra //FIXME check
 396         if(!(error&ER_MV_ERROR)) f=MV_FROZEN;           //inter with undamaged MV
 397
 398         fixed[mb_xy]= f;
 399         if(f==MV_FROZEN)
 400             num_avail++;
 401         else if(s->last_picture.f.data[0] && s->last_picture.f.motion_val[0]){
 402             const int mb_y= mb_xy / s->mb_stride;
 403             const int mb_x= mb_xy % s->mb_stride;
 404             const int mot_index= (mb_x + mb_y*mot_stride) * mot_step;
 405             s->current_picture.f.motion_val[0][mot_index][0]= s->last_picture.f.motion_val[0][mot_index][0];
 406             s->current_picture.f.motion_val[0][mot_index][1]= s->last_picture.f.motion_val[0][mot_index][1];
 407             s->current_picture.f.ref_index[0][4*mb_xy]      = s->last_picture.f.ref_index[0][4*mb_xy];
 408         }
 409     }
 410
 411     if((!(s->avctx->error_concealment&FF_EC_GUESS_MVS)) || num_avail <= mb_width/2){
 412         for(mb_y=0; mb_y<s->mb_height; mb_y++){
 413             for(mb_x=0; mb_x<s->mb_width; mb_x++){
 414                 const int mb_xy= mb_x + mb_y*s->mb_stride;
 415
 416                 if(IS_INTRA(s->current_picture.f.mb_type[mb_xy]))  continue;
 417                 if(!(s->error_status_table[mb_xy]&ER_MV_ERROR)) continue;
 418
 419                 s->mv_dir = s->last_picture.f.data[0] ? MV_DIR_FORWARD : MV_DIR_BACKWARD;
 420                 s->mb_intra=0;
 421                 s->mv_type = MV_TYPE_16X16;
 422                 s->mb_skipped=0;
 423
 424                 s->dsp.clear_blocks(s->block[0]);
 425
 426                 s->mb_x= mb_x;
 427                 s->mb_y= mb_y;
 428                 s->mv[0][0][0]= 0;
 429                 s->mv[0][0][1]= 0;
 430                 decode_mb(s, 0);
 431             }
 432         }
 433         goto end;
 434     }
 435
 436     for(depth=0;; depth++){
 437         int changed, pass, none_left;
 438
 439         none_left=1;
 440         changed=1;
 441         for(pass=0; (changed || pass<2) && pass<10; pass++){
 442             int mb_x, mb_y;
 443 int score_sum=0;
 444
 445             changed=0;
 446             for(mb_y=0; mb_y<s->mb_height; mb_y++){
 447                 for(mb_x=0; mb_x<s->mb_width; mb_x++){
 448                     const int mb_xy= mb_x + mb_y*s->mb_stride;
 449                     int mv_predictor[8][2]={{0}};
 450                     int ref[8]={0};
 451                     int pred_count=0;
 452                     int j;
 453                     int best_score=256*256*256*64;
 454                     int best_pred=0;
 455                     const int mot_index= (mb_x + mb_y*mot_stride) * mot_step;
 456                     int prev_x, prev_y, prev_ref;
 457
 458                     if((mb_x^mb_y^pass)&1) continue;
 459
 460                     if(fixed[mb_xy]==MV_FROZEN) continue;
 461                     assert(!IS_INTRA(s->current_picture.f.mb_type[mb_xy]));
 462                     assert(s->last_picture_ptr && s->last_picture_ptr->f.data[0]);
 463
 464                     j=0;
 465                     if(mb_x>0           && fixed[mb_xy-1        ]==MV_FROZEN) j=1;
 466                     if(mb_x+1<mb_width  && fixed[mb_xy+1        ]==MV_FROZEN) j=1;
 467                     if(mb_y>0           && fixed[mb_xy-mb_stride]==MV_FROZEN) j=1;
 468                     if(mb_y+1<mb_height && fixed[mb_xy+mb_stride]==MV_FROZEN) j=1;
 469                     if(j==0) continue;
 470
 471                     j=0;
 472                     if(mb_x>0           && fixed[mb_xy-1        ]==MV_CHANGED) j=1;
 473                     if(mb_x+1<mb_width  && fixed[mb_xy+1        ]==MV_CHANGED) j=1;
 474                     if(mb_y>0           && fixed[mb_xy-mb_stride]==MV_CHANGED) j=1;
 475                     if(mb_y+1<mb_height && fixed[mb_xy+mb_stride]==MV_CHANGED) j=1;
 476                     if(j==0 && pass>1) continue;
 477
 478                     none_left=0;
 479
 480                     if(mb_x>0 && fixed[mb_xy-1]){
 481                         mv_predictor[pred_count][0]= s->current_picture.f.motion_val[0][mot_index - mot_step][0];
 482                         mv_predictor[pred_count][1]= s->current_picture.f.motion_val[0][mot_index - mot_step][1];
 483                         ref         [pred_count]   = s->current_picture.f.ref_index[0][4*(mb_xy-1)];
 484                         pred_count++;
 485                     }
 486                     if(mb_x+1<mb_width && fixed[mb_xy+1]){
 487                         mv_predictor[pred_count][0]= s->current_picture.f.motion_val[0][mot_index + mot_step][0];
 488                         mv_predictor[pred_count][1]= s->current_picture.f.motion_val[0][mot_index + mot_step][1];
 489                         ref         [pred_count]   = s->current_picture.f.ref_index[0][4*(mb_xy+1)];
 490                         pred_count++;
 491                     }
 492                     if(mb_y>0 && fixed[mb_xy-mb_stride]){
 493                         mv_predictor[pred_count][0]= s->current_picture.f.motion_val[0][mot_index - mot_stride*mot_step][0];
 494                         mv_predictor[pred_count][1]= s->current_picture.f.motion_val[0][mot_index - mot_stride*mot_step][1];
 495                         ref         [pred_count]   = s->current_picture.f.ref_index[0][4*(mb_xy-s->mb_stride)];
 496                         pred_count++;
 497                     }
 498                     if(mb_y+1<mb_height && fixed[mb_xy+mb_stride]){
 499                         mv_predictor[pred_count][0]= s->current_picture.f.motion_val[0][mot_index + mot_stride*mot_step][0];
 500                         mv_predictor[pred_count][1]= s->current_picture.f.motion_val[0][mot_index + mot_stride*mot_step][1];
 501                         ref         [pred_count]   = s->current_picture.f.ref_index[0][4*(mb_xy+s->mb_stride)];
 502                         pred_count++;
 503                     }
 504                     if(pred_count==0) continue;
 505
 506                     if(pred_count>1){
 507                         int sum_x=0, sum_y=0, sum_r=0;
 508                         int max_x, max_y, min_x, min_y, max_r, min_r;
 509
 510                         for(j=0; j<pred_count; j++){
 511                             sum_x+= mv_predictor[j][0];
 512                             sum_y+= mv_predictor[j][1];
 513                             sum_r+= ref[j];
 514                             if(j && ref[j] != ref[j-1])
 515                                 goto skip_mean_and_median;
 516                         }
 517
 518                         /* mean */
 519                         mv_predictor[pred_count][0] = sum_x/j;
 520                         mv_predictor[pred_count][1] = sum_y/j;
 521                         ref         [pred_count]    = sum_r/j;
 522
 523                         /* median */
 524                         if(pred_count>=3){
 525                             min_y= min_x= min_r= 99999;
 526                             max_y= max_x= max_r=-99999;
 527                         }else{
 528                             min_x=min_y=max_x=max_y=min_r=max_r=0;
 529                         }
 530                         for(j=0; j<pred_count; j++){
 531                             max_x= FFMAX(max_x, mv_predictor[j][0]);
 532                             max_y= FFMAX(max_y, mv_predictor[j][1]);
 533                             max_r= FFMAX(max_r, ref[j]);
 534                             min_x= FFMIN(min_x, mv_predictor[j][0]);
 535                             min_y= FFMIN(min_y, mv_predictor[j][1]);
 536                             min_r= FFMIN(min_r, ref[j]);
 537                         }
 538                         mv_predictor[pred_count+1][0] = sum_x - max_x - min_x;
 539                         mv_predictor[pred_count+1][1] = sum_y - max_y - min_y;
 540                         ref         [pred_count+1]    = sum_r - max_r - min_r;
 541
 542                         if(pred_count==4){
 543                             mv_predictor[pred_count+1][0] /= 2;
 544                             mv_predictor[pred_count+1][1] /= 2;
 545                             ref         [pred_count+1]    /= 2;
 546                         }
 547                         pred_count+=2;
 548                     }
 549 skip_mean_and_median:
 550
 551                     /* zero MV */
 552                     pred_count++;
 553
 554                     if (!fixed[mb_xy] && 0) {
 555                         if (s->avctx->codec_id == CODEC_ID_H264) {
 556                             // FIXME
 557                         } else {
 558                             ff_thread_await_progress((AVFrame *) s->last_picture_ptr,
 559                                                      mb_y, 0);
 560                         }
 561                         if (!s->last_picture.f.motion_val[0] ||
 562                             !s->last_picture.f.ref_index[0])
 563                             goto skip_last_mv;
 564                         prev_x = s->last_picture.f.motion_val[0][mot_index][0];
 565                         prev_y = s->last_picture.f.motion_val[0][mot_index][1];
 566                         prev_ref = s->last_picture.f.ref_index[0][4*mb_xy];
 567                     } else {
 568                         prev_x = s->current_picture.f.motion_val[0][mot_index][0];
 569                         prev_y = s->current_picture.f.motion_val[0][mot_index][1];
 570                         prev_ref = s->current_picture.f.ref_index[0][4*mb_xy];
 571                     }
 572
 573                     /* last MV */
 574                     mv_predictor[pred_count][0]= prev_x;
 575                     mv_predictor[pred_count][1]= prev_y;
 576                     ref         [pred_count]   = prev_ref;
 577                     pred_count++;
 578                 skip_last_mv:
 579
 580                     s->mv_dir = MV_DIR_FORWARD;
 581                     s->mb_intra=0;
 582                     s->mv_type = MV_TYPE_16X16;
 583                     s->mb_skipped=0;
 584
 585                     s->dsp.clear_blocks(s->block[0]);
 586
 587                     s->mb_x= mb_x;
 588                     s->mb_y= mb_y;
 589
 590                     for(j=0; j<pred_count; j++){
 591                         int score=0;
 592                         uint8_t *src = s->current_picture.f.data[0] + mb_x*16 + mb_y*16*s->linesize;
 593
 594                         s->current_picture.f.motion_val[0][mot_index][0] = s->mv[0][0][0] = mv_predictor[j][0];
 595                         s->current_picture.f.motion_val[0][mot_index][1] = s->mv[0][0][1] = mv_predictor[j][1];
 596
 597                         if(ref[j]<0) //predictor intra or otherwise not available
 598                             continue;
 599
 600                         decode_mb(s, ref[j]);
 601
 602                         if(mb_x>0 && fixed[mb_xy-1]){
 603                             int k;
 604                             for(k=0; k<16; k++)
 605                                 score += FFABS(src[k*s->linesize-1 ]-src[k*s->linesize   ]);
 606                         }
 607                         if(mb_x+1<mb_width && fixed[mb_xy+1]){
 608                             int k;
 609                             for(k=0; k<16; k++)
 610                                 score += FFABS(src[k*s->linesize+15]-src[k*s->linesize+16]);
 611                         }
 612                         if(mb_y>0 && fixed[mb_xy-mb_stride]){
 613                             int k;
 614                             for(k=0; k<16; k++)
 615                                 score += FFABS(src[k-s->linesize   ]-src[k               ]);
 616                         }
 617                         if(mb_y+1<mb_height && fixed[mb_xy+mb_stride]){
 618                             int k;
 619                             for(k=0; k<16; k++)
 620                                 score += FFABS(src[k+s->linesize*15]-src[k+s->linesize*16]);
 621                         }
 622
 623                         if(score <= best_score){ // <= will favor the last MV
 624                             best_score= score;
 625                             best_pred= j;
 626                         }
 627                     }
 628 score_sum+= best_score;
 629                     s->mv[0][0][0]= mv_predictor[best_pred][0];
 630                     s->mv[0][0][1]= mv_predictor[best_pred][1];
 631
 632                     for(i=0; i<mot_step; i++)
 633                         for(j=0; j<mot_step; j++){
 634                             s->current_picture.f.motion_val[0][mot_index + i + j * mot_stride][0] = s->mv[0][0][0];
 635                             s->current_picture.f.motion_val[0][mot_index + i + j * mot_stride][1] = s->mv[0][0][1];
 636                         }
 637
 638                     decode_mb(s, ref[best_pred]);
 639
 640
 641                     if(s->mv[0][0][0] != prev_x || s->mv[0][0][1] != prev_y){
 642                         fixed[mb_xy]=MV_CHANGED;
 643                         changed++;
 644                     }else
 645                         fixed[mb_xy]=MV_UNCHANGED;
 646                 }
 647             }
 648
 649 //            printf(".%d/%d", changed, score_sum); fflush(stdout);
 650         }
 651
 652         if(none_left)
 653             goto end;
 654
 655         for(i=0; i<s->mb_num; i++){
 656             int mb_xy= s->mb_index2xy[i];
 657             if(fixed[mb_xy])
 658                 fixed[mb_xy]=MV_FROZEN;
 659         }
 660 //        printf(":"); fflush(stdout);
 661     }
 662 end:
 663     av_free(fixed);
 664 }
 665
 666 static int is_intra_more_likely(MpegEncContext *s){
 667     int is_intra_likely, i, j, undamaged_count, skip_amount, mb_x, mb_y;
 668
 669     if (!s->last_picture_ptr || !s->last_picture_ptr->f.data[0]) return 1; //no previous frame available -> use spatial prediction
 670
 671     undamaged_count=0;
 672     for(i=0; i<s->mb_num; i++){
 673         const int mb_xy= s->mb_index2xy[i];
 674         const int error= s->error_status_table[mb_xy];
 675         if(!((error&ER_DC_ERROR) && (error&ER_MV_ERROR)))
 676             undamaged_count++;
 677     }
 678
 679     if(s->codec_id == CODEC_ID_H264){
 680         H264Context *h= (void*)s;
 681         if (h->list_count <= 0 || h->ref_count[0] <= 0 || !h->ref_list[0][0].f.data[0])
 682             return 1;
 683     }
 684
 685     if(undamaged_count < 5) return 0; //almost all MBs damaged -> use temporal prediction
 686
 687     //prevent dsp.sad() check, that requires access to the image
 688     if(CONFIG_MPEG_XVMC_DECODER && s->avctx->xvmc_acceleration && s->pict_type == AV_PICTURE_TYPE_I)
 689         return 1;
 690
 691     skip_amount = FFMAX(undamaged_count / 50, 1); // check only up to 50 MBs
 692     is_intra_likely=0;
 693
 694     j=0;
 695     for(mb_y= 0; mb_y<s->mb_height-1; mb_y++){
 696         for(mb_x= 0; mb_x<s->mb_width; mb_x++){
 697             int error;
 698             const int mb_xy= mb_x + mb_y*s->mb_stride;
 699
 700             error= s->error_status_table[mb_xy];
 701             if((error&ER_DC_ERROR) && (error&ER_MV_ERROR))
 702                 continue; //skip damaged
 703
 704             j++;
 705             if((j%skip_amount) != 0) continue; //skip a few to speed things up
 706
 707             if(s->pict_type==AV_PICTURE_TYPE_I){
 708                 uint8_t *mb_ptr     = s->current_picture.f.data[0] + mb_x*16 + mb_y*16*s->linesize;
 709                 uint8_t *last_mb_ptr= s->last_picture.f.data   [0] + mb_x*16 + mb_y*16*s->linesize;
 710
 711                 if (s->avctx->codec_id == CODEC_ID_H264) {
 712                     // FIXME
 713                 } else {
 714                     ff_thread_await_progress((AVFrame *) s->last_picture_ptr,
 715                                              mb_y, 0);
 716                 }
 717                 is_intra_likely += s->dsp.sad[0](NULL, last_mb_ptr, mb_ptr                    , s->linesize, 16);
 718                 // FIXME need await_progress() here
 719                 is_intra_likely -= s->dsp.sad[0](NULL, last_mb_ptr, last_mb_ptr+s->linesize*16, s->linesize, 16);
 720             }else{
 721                 if (IS_INTRA(s->current_picture.f.mb_type[mb_xy]))
 722                    is_intra_likely++;
 723                 else
 724                    is_intra_likely--;
 725             }
 726         }
 727     }
 728 //printf("is_intra_likely: %d type:%d\n", is_intra_likely, s->pict_type);
 729     return is_intra_likely > 0;
 730 }
 731
 732 void ff_er_frame_start(MpegEncContext *s){
 733     if(!s->err_recognition) return;
 734
 735     memset(s->error_status_table, ER_MB_ERROR|VP_START|ER_MB_END, s->mb_stride*s->mb_height*sizeof(uint8_t));
 736     s->error_count= 3*s->mb_num;
 737     s->error_occurred = 0;
 738 }
 739
 740 /**
 741  * Add a slice.
 742  * @param endx x component of the last macroblock, can be -1 for the last of the previous line
 743  * @param status the status at the end (ER_MV_END, ER_AC_ERROR, ...), it is assumed that no earlier end or
 744  *               error of the same type occurred
 745  */
 746 void ff_er_add_slice(MpegEncContext *s, int startx, int starty, int endx, int endy, int status){
 747     const int start_i= av_clip(startx + starty * s->mb_width    , 0, s->mb_num-1);
 748     const int end_i  = av_clip(endx   + endy   * s->mb_width    , 0, s->mb_num);
 749     const int start_xy= s->mb_index2xy[start_i];
 750     const int end_xy  = s->mb_index2xy[end_i];
 751     int mask= -1;
 752
 753     if(s->avctx->hwaccel)
 754         return;
 755
 756     if(start_i > end_i || start_xy > end_xy){
 757         av_log(s->avctx, AV_LOG_ERROR, "internal error, slice end before start\n");
 758         return;
 759     }
 760
 761     if(!s->err_recognition) return;
 762
 763     mask &= ~VP_START;
 764     if(status & (ER_AC_ERROR|ER_AC_END)){
 765         mask &= ~(ER_AC_ERROR|ER_AC_END);
 766         s->error_count -= end_i - start_i + 1;
 767     }
 768     if(status & (ER_DC_ERROR|ER_DC_END)){
 769         mask &= ~(ER_DC_ERROR|ER_DC_END);
 770         s->error_count -= end_i - start_i + 1;
 771     }
 772     if(status & (ER_MV_ERROR|ER_MV_END)){
 773         mask &= ~(ER_MV_ERROR|ER_MV_END);
 774         s->error_count -= end_i - start_i + 1;
 775     }
 776
 777     if(status & ER_MB_ERROR) {
 778         s->error_occurred = 1;
 779         s->error_count= INT_MAX;
 780     }
 781
 782     if(mask == ~0x7F){
 783         memset(&s->error_status_table[start_xy], 0, (end_xy - start_xy) * sizeof(uint8_t));
 784     }else{
 785         int i;
 786         for(i=start_xy; i<end_xy; i++){
 787             s->error_status_table[ i ] &= mask;
 788         }
 789     }
 790
 791     if(end_i == s->mb_num)
 792         s->error_count= INT_MAX;
 793     else{
 794         s->error_status_table[end_xy] &= mask;
 795         s->error_status_table[end_xy] |= status;
 796     }
 797
 798     s->error_status_table[start_xy] |= VP_START;
 799
 800     if(start_xy > 0 && s->avctx->thread_count <= 1 && s->avctx->skip_top*s->mb_width < start_i){
 801         int prev_status= s->error_status_table[ s->mb_index2xy[start_i - 1] ];
 802
 803         prev_status &= ~ VP_START;
 804         if(prev_status != (ER_MV_END|ER_DC_END|ER_AC_END)) s->error_count= INT_MAX;
 805     }
 806 }
 807
 808 void ff_er_frame_end(MpegEncContext *s){
 809     int i, mb_x, mb_y, error, error_type, dc_error, mv_error, ac_error;
 810     int distance;
 811     int threshold_part[4]= {100,100,100};
 812     int threshold= 50;
 813     int is_intra_likely;
 814     int size = s->b8_stride * 2 * s->mb_height;
 815     Picture *pic= s->current_picture_ptr;
 816
 817     if(!s->err_recognition || s->error_count==0 || s->avctx->lowres ||
 818        s->avctx->hwaccel ||
 819        s->avctx->codec->capabilities&CODEC_CAP_HWACCEL_VDPAU ||
 820        s->picture_structure != PICT_FRAME || // we do not support ER of field pictures yet, though it should not crash if enabled
 821        s->error_count==3*s->mb_width*(s->avctx->skip_top + s->avctx->skip_bottom)) return;
 822
 823     if (s->current_picture.f.motion_val[0] == NULL) {
 824         av_log(s->avctx, AV_LOG_ERROR, "Warning MVs not available\n");
 825
 826         for(i=0; i<2; i++){
 827             pic->f.ref_index[i] = av_mallocz(s->mb_stride * s->mb_height * 4 * sizeof(uint8_t));
 828             pic->motion_val_base[i]= av_mallocz((size+4) * 2 * sizeof(uint16_t));
 829             pic->f.motion_val[i] = pic->motion_val_base[i] + 4;
 830         }
 831         pic->f.motion_subsample_log2 = 3;
 832         s->current_picture= *s->current_picture_ptr;
 833     }
 834
 835     if(s->avctx->debug&FF_DEBUG_ER){
 836         for(mb_y=0; mb_y<s->mb_height; mb_y++){
 837             for(mb_x=0; mb_x<s->mb_width; mb_x++){
 838                 int status= s->error_status_table[mb_x + mb_y*s->mb_stride];
 839
 840                 av_log(s->avctx, AV_LOG_DEBUG, "%2X ", status);
 841             }
 842             av_log(s->avctx, AV_LOG_DEBUG, "\n");
 843         }
 844     }
 845
 846 #if 1
 847     /* handle overlapping slices */
 848     for(error_type=1; error_type<=3; error_type++){
 849         int end_ok=0;
 850
 851         for(i=s->mb_num-1; i>=0; i--){
 852             const int mb_xy= s->mb_index2xy[i];
 853             int error= s->error_status_table[mb_xy];
 854
 855             if(error&(1<<error_type))
 856                 end_ok=1;
 857             if(error&(8<<error_type))
 858                 end_ok=1;
 859
 860             if(!end_ok)
 861                 s->error_status_table[mb_xy]|= 1<<error_type;
 862
 863             if(error&VP_START)
 864                 end_ok=0;
 865         }
 866     }
 867 #endif
 868 #if 1
 869     /* handle slices with partitions of different length */
 870     if(s->partitioned_frame){
 871         int end_ok=0;
 872
 873         for(i=s->mb_num-1; i>=0; i--){
 874             const int mb_xy= s->mb_index2xy[i];
 875             int error= s->error_status_table[mb_xy];
 876
 877             if(error&ER_AC_END)
 878                 end_ok=0;
 879             if((error&ER_MV_END) || (error&ER_DC_END) || (error&ER_AC_ERROR))
 880                 end_ok=1;
 881
 882             if(!end_ok)
 883                 s->error_status_table[mb_xy]|= ER_AC_ERROR;
 884
 885             if(error&VP_START)
 886                 end_ok=0;
 887         }
 888     }
 889 #endif
 890     /* handle missing slices */
 891     if(s->err_recognition&AV_EF_EXPLODE){
 892         int end_ok=1;
 893
 894         for(i=s->mb_num-2; i>=s->mb_width+100; i--){ //FIXME +100 hack
 895             const int mb_xy= s->mb_index2xy[i];
 896             int error1= s->error_status_table[mb_xy  ];
 897             int error2= s->error_status_table[s->mb_index2xy[i+1]];
 898
 899             if(error1&VP_START)
 900                 end_ok=1;
 901
 902             if(   error2==(VP_START|ER_MB_ERROR|ER_MB_END)
 903                && error1!=(VP_START|ER_MB_ERROR|ER_MB_END)
 904                && ((error1&ER_AC_END) || (error1&ER_DC_END) || (error1&ER_MV_END))){ //end & uninit
 905                 end_ok=0;
 906             }
 907
 908             if(!end_ok)
 909                 s->error_status_table[mb_xy]|= ER_MB_ERROR;
 910         }
 911     }
 912
 913 #if 1
 914     /* backward mark errors */
 915     distance=9999999;
 916     for(error_type=1; error_type<=3; error_type++){
 917         for(i=s->mb_num-1; i>=0; i--){
 918             const int mb_xy= s->mb_index2xy[i];
 919             int error= s->error_status_table[mb_xy];
 920
 921             if(!s->mbskip_table[mb_xy]) //FIXME partition specific
 922                 distance++;
 923             if(error&(1<<error_type))
 924                 distance= 0;
 925
 926             if(s->partitioned_frame){
 927                 if(distance < threshold_part[error_type-1])
 928                     s->error_status_table[mb_xy]|= 1<<error_type;
 929             }else{
 930                 if(distance < threshold)
 931                     s->error_status_table[mb_xy]|= 1<<error_type;
 932             }
 933
 934             if(error&VP_START)
 935                 distance= 9999999;
 936         }
 937     }
 938 #endif
 939
 940     /* forward mark errors */
 941     error=0;
 942     for(i=0; i<s->mb_num; i++){
 943         const int mb_xy= s->mb_index2xy[i];
 944         int old_error= s->error_status_table[mb_xy];
 945
 946         if(old_error&VP_START)
 947             error= old_error& ER_MB_ERROR;
 948         else{
 949             error|= old_error& ER_MB_ERROR;
 950             s->error_status_table[mb_xy]|= error;
 951         }
 952     }
 953 #if 1
 954     /* handle not partitioned case */
 955     if(!s->partitioned_frame){
 956         for(i=0; i<s->mb_num; i++){
 957             const int mb_xy= s->mb_index2xy[i];
 958             error= s->error_status_table[mb_xy];
 959             if(error&ER_MB_ERROR)
 960                 error|= ER_MB_ERROR;
 961             s->error_status_table[mb_xy]= error;
 962         }
 963     }
 964 #endif
 965
 966     dc_error= ac_error= mv_error=0;
 967     for(i=0; i<s->mb_num; i++){
 968         const int mb_xy= s->mb_index2xy[i];
 969         error= s->error_status_table[mb_xy];
 970         if(error&ER_DC_ERROR) dc_error ++;
 971         if(error&ER_AC_ERROR) ac_error ++;
 972         if(error&ER_MV_ERROR) mv_error ++;
 973     }
 974     av_log(s->avctx, AV_LOG_INFO, "concealing %d DC, %d AC, %d MV errors\n", dc_error, ac_error, mv_error);
 975
 976     is_intra_likely= is_intra_more_likely(s);
 977
 978     /* set unknown mb-type to most likely */
 979     for(i=0; i<s->mb_num; i++){
 980         const int mb_xy= s->mb_index2xy[i];
 981         error= s->error_status_table[mb_xy];
 982         if(!((error&ER_DC_ERROR) && (error&ER_MV_ERROR)))
 983             continue;
 984
 985         if(is_intra_likely)
 986             s->current_picture.f.mb_type[mb_xy] = MB_TYPE_INTRA4x4;
 987         else
 988             s->current_picture.f.mb_type[mb_xy] = MB_TYPE_16x16 | MB_TYPE_L0;
 989     }
 990
 991     // change inter to intra blocks if no reference frames are available
 992     if (!s->last_picture.f.data[0] && !s->next_picture.f.data[0])
 993         for(i=0; i<s->mb_num; i++){
 994             const int mb_xy= s->mb_index2xy[i];
 995             if (!IS_INTRA(s->current_picture.f.mb_type[mb_xy]))
 996                 s->current_picture.f.mb_type[mb_xy] = MB_TYPE_INTRA4x4;
 997         }
 998
 999     /* handle inter blocks with damaged AC */
1000     for(mb_y=0; mb_y<s->mb_height; mb_y++){
1001         for(mb_x=0; mb_x<s->mb_width; mb_x++){
1002             const int mb_xy= mb_x + mb_y * s->mb_stride;
1003             const int mb_type= s->current_picture.f.mb_type[mb_xy];
1004             int dir = !s->last_picture.f.data[0];
1005             error= s->error_status_table[mb_xy];
1006
1007             if(IS_INTRA(mb_type)) continue; //intra
1008             if(error&ER_MV_ERROR) continue;              //inter with damaged MV
1009             if(!(error&ER_AC_ERROR)) continue;           //undamaged inter
1010
1011             s->mv_dir = dir ? MV_DIR_BACKWARD : MV_DIR_FORWARD;
1012             s->mb_intra=0;
1013             s->mb_skipped=0;
1014             if(IS_8X8(mb_type)){
1015                 int mb_index= mb_x*2 + mb_y*2*s->b8_stride;
1016                 int j;
1017                 s->mv_type = MV_TYPE_8X8;
1018                 for(j=0; j<4; j++){
1019                     s->mv[0][j][0] = s->current_picture.f.motion_val[dir][mb_index + (j & 1) + (j >> 1) * s->b8_stride][0];
1020                     s->mv[0][j][1] = s->current_picture.f.motion_val[dir][mb_index + (j & 1) + (j >> 1) * s->b8_stride][1];
1021                 }
1022             }else{
1023                 s->mv_type = MV_TYPE_16X16;
1024                 s->mv[0][0][0] = s->current_picture.f.motion_val[dir][ mb_x*2 + mb_y*2*s->b8_stride ][0];
1025                 s->mv[0][0][1] = s->current_picture.f.motion_val[dir][ mb_x*2 + mb_y*2*s->b8_stride ][1];
1026             }
1027
1028             s->dsp.clear_blocks(s->block[0]);
1029
1030             s->mb_x= mb_x;
1031             s->mb_y= mb_y;
1032             decode_mb(s, 0/*FIXME h264 partitioned slices need this set*/);
1033         }
1034     }
1035
1036     /* guess MVs */
1037     if(s->pict_type==AV_PICTURE_TYPE_B){
1038         for(mb_y=0; mb_y<s->mb_height; mb_y++){
1039             for(mb_x=0; mb_x<s->mb_width; mb_x++){
1040                 int xy= mb_x*2 + mb_y*2*s->b8_stride;
1041                 const int mb_xy= mb_x + mb_y * s->mb_stride;
1042                 const int mb_type= s->current_picture.f.mb_type[mb_xy];
1043                 error= s->error_status_table[mb_xy];
1044
1045                 if(IS_INTRA(mb_type)) continue;
1046                 if(!(error&ER_MV_ERROR)) continue;           //inter with undamaged MV
1047                 if(!(error&ER_AC_ERROR)) continue;           //undamaged inter
1048
1049                 s->mv_dir = MV_DIR_FORWARD|MV_DIR_BACKWARD;
1050                 if(!s->last_picture.f.data[0]) s->mv_dir &= ~MV_DIR_FORWARD;
1051                 if(!s->next_picture.f.data[0]) s->mv_dir &= ~MV_DIR_BACKWARD;
1052                 s->mb_intra=0;
1053                 s->mv_type = MV_TYPE_16X16;
1054                 s->mb_skipped=0;
1055
1056                 if(s->pp_time){
1057                     int time_pp= s->pp_time;
1058                     int time_pb= s->pb_time;
1059
1060                     if (s->avctx->codec_id == CODEC_ID_H264) {
1061                         //FIXME
1062                     } else {
1063                         ff_thread_await_progress((AVFrame *) s->next_picture_ptr,
1064                                                  mb_y, 0);
1065                     }
1066                     s->mv[0][0][0] = s->next_picture.f.motion_val[0][xy][0] *            time_pb  / time_pp;
1067                     s->mv[0][0][1] = s->next_picture.f.motion_val[0][xy][1] *            time_pb  / time_pp;
1068                     s->mv[1][0][0] = s->next_picture.f.motion_val[0][xy][0] * (time_pb - time_pp) / time_pp;
1069                     s->mv[1][0][1] = s->next_picture.f.motion_val[0][xy][1] * (time_pb - time_pp) / time_pp;
1070                 }else{
1071                     s->mv[0][0][0]= 0;
1072                     s->mv[0][0][1]= 0;
1073                     s->mv[1][0][0]= 0;
1074                     s->mv[1][0][1]= 0;
1075                 }
1076
1077                 s->dsp.clear_blocks(s->block[0]);
1078                 s->mb_x= mb_x;
1079                 s->mb_y= mb_y;
1080                 decode_mb(s, 0);
1081             }
1082         }
1083     }else
1084         guess_mv(s);
1085
1086     /* the filters below are not XvMC compatible, skip them */
1087     if(CONFIG_MPEG_XVMC_DECODER && s->avctx->xvmc_acceleration)
1088         goto ec_clean;
1089     /* fill DC for inter blocks */
1090     for(mb_y=0; mb_y<s->mb_height; mb_y++){
1091         for(mb_x=0; mb_x<s->mb_width; mb_x++){
1092             int dc, dcu, dcv, y, n;
1093             int16_t *dc_ptr;
1094             uint8_t *dest_y, *dest_cb, *dest_cr;
1095             const int mb_xy= mb_x + mb_y * s->mb_stride;
1096             const int mb_type = s->current_picture.f.mb_type[mb_xy];
1097
1098             error= s->error_status_table[mb_xy];
1099
1100             if(IS_INTRA(mb_type) && s->partitioned_frame) continue;
1101 //            if(error&ER_MV_ERROR) continue; //inter data damaged FIXME is this good?
1102
1103             dest_y  = s->current_picture.f.data[0] + mb_x * 16 + mb_y * 16 * s->linesize;
1104             dest_cb = s->current_picture.f.data[1] + mb_x *  8 + mb_y *  8 * s->uvlinesize;
1105             dest_cr = s->current_picture.f.data[2] + mb_x *  8 + mb_y *  8 * s->uvlinesize;
1106
1107             dc_ptr= &s->dc_val[0][mb_x*2 + mb_y*2*s->b8_stride];
1108             for(n=0; n<4; n++){
1109                 dc=0;
1110                 for(y=0; y<8; y++){
1111                     int x;
1112                     for(x=0; x<8; x++){
1113                        dc+= dest_y[x + (n&1)*8 + (y + (n>>1)*8)*s->linesize];
1114                     }
1115                 }
1116                 dc_ptr[(n&1) + (n>>1)*s->b8_stride]= (dc+4)>>3;
1117             }
1118
1119             dcu=dcv=0;
1120             for(y=0; y<8; y++){
1121                 int x;
1122                 for(x=0; x<8; x++){
1123                     dcu += dest_cb[x + y * s->uvlinesize];
1124                     dcv += dest_cr[x + y * s->uvlinesize];
1125                 }
1126             }
1127             s->dc_val[1][mb_x + mb_y*s->mb_stride]= (dcu+4)>>3;
1128             s->dc_val[2][mb_x + mb_y*s->mb_stride]= (dcv+4)>>3;
1129         }
1130     }
1131 #if 1
1132     /* guess DC for damaged blocks */
1133     guess_dc(s, s->dc_val[0], s->mb_width*2, s->mb_height*2, s->b8_stride, 1);
1134     guess_dc(s, s->dc_val[1], s->mb_width  , s->mb_height  , s->mb_stride, 0);
1135     guess_dc(s, s->dc_val[2], s->mb_width  , s->mb_height  , s->mb_stride, 0);
1136 #endif
1137     /* filter luma DC */
1138     filter181(s->dc_val[0], s->mb_width*2, s->mb_height*2, s->b8_stride);
1139
1140 #if 1
1141     /* render DC only intra */
1142     for(mb_y=0; mb_y<s->mb_height; mb_y++){
1143         for(mb_x=0; mb_x<s->mb_width; mb_x++){
1144             uint8_t *dest_y, *dest_cb, *dest_cr;
1145             const int mb_xy= mb_x + mb_y * s->mb_stride;
1146             const int mb_type = s->current_picture.f.mb_type[mb_xy];
1147
1148             error= s->error_status_table[mb_xy];
1149
1150             if(IS_INTER(mb_type)) continue;
1151             if(!(error&ER_AC_ERROR)) continue;              //undamaged
1152
1153             dest_y  = s->current_picture.f.data[0] + mb_x * 16 + mb_y * 16 * s->linesize;
1154             dest_cb = s->current_picture.f.data[1] + mb_x *  8 + mb_y *  8 * s->uvlinesize;
1155             dest_cr = s->current_picture.f.data[2] + mb_x *  8 + mb_y *  8 * s->uvlinesize;
1156
1157             put_dc(s, dest_y, dest_cb, dest_cr, mb_x, mb_y);
1158         }
1159     }
1160 #endif
1161
1162     if(s->avctx->error_concealment&FF_EC_DEBLOCK){
1163         /* filter horizontal block boundaries */
1164         h_block_filter(s, s->current_picture.f.data[0], s->mb_width*2, s->mb_height*2, s->linesize  , 1);
1165         h_block_filter(s, s->current_picture.f.data[1], s->mb_width  , s->mb_height  , s->uvlinesize, 0);
1166         h_block_filter(s, s->current_picture.f.data[2], s->mb_width  , s->mb_height  , s->uvlinesize, 0);
1167
1168         /* filter vertical block boundaries */
1169         v_block_filter(s, s->current_picture.f.data[0], s->mb_width*2, s->mb_height*2, s->linesize  , 1);
1170         v_block_filter(s, s->current_picture.f.data[1], s->mb_width  , s->mb_height  , s->uvlinesize, 0);
1171         v_block_filter(s, s->current_picture.f.data[2], s->mb_width  , s->mb_height  , s->uvlinesize, 0);
1172     }
1173
1174 ec_clean:
1175     /* clean a few tables */
1176     for(i=0; i<s->mb_num; i++){
1177         const int mb_xy= s->mb_index2xy[i];
1178         int error= s->error_status_table[mb_xy];
1179
1180         if(s->pict_type!=AV_PICTURE_TYPE_B && (error&(ER_DC_ERROR|ER_MV_ERROR|ER_AC_ERROR))){
1181             s->mbskip_table[mb_xy]=0;
1182         }
1183         s->mbintra_table[mb_xy]=1;
1184     }
1185 }