Statistics
| Branch: | Revision:

ffmpeg / libavcodec / error_resilience.c @ f66e4f5f

History | View | Annotate | Download (38.4 KB)

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 error_resilience.c
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 "common.h"
34

    
35
static void decode_mb(MpegEncContext *s){
36
    s->dest[0] = s->current_picture.data[0] + (s->mb_y * 16* s->linesize  ) + s->mb_x * 16;
37
    s->dest[1] = s->current_picture.data[1] + (s->mb_y * 8 * s->uvlinesize) + s->mb_x * 8;
38
    s->dest[2] = s->current_picture.data[2] + (s->mb_y * 8 * s->uvlinesize) + s->mb_x * 8;
39

    
40
    MPV_decode_mb(s, s->block);
41
}
42

    
43
/**
44
 * replaces the current MB with a flat dc only version.
45
 */
46
static void put_dc(MpegEncContext *s, uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr, int mb_x, int mb_y)
47
{
48
    int dc, dcu, dcv, y, i;
49
    for(i=0; i<4; i++){
50
        dc= s->dc_val[0][mb_x*2 + (i&1) + (mb_y*2 + (i>>1))*s->b8_stride];
51
        if(dc<0) dc=0;
52
        else if(dc>2040) dc=2040;
53
        for(y=0; y<8; y++){
54
            int x;
55
            for(x=0; x<8; x++){
56
                dest_y[x + (i&1)*8 + (y + (i>>1)*8)*s->linesize]= dc/8;
57
            }
58
        }
59
    }
60
    dcu = s->dc_val[1][mb_x + mb_y*s->mb_stride];
61
    dcv = s->dc_val[2][mb_x + mb_y*s->mb_stride];
62
    if     (dcu<0   ) dcu=0;
63
    else if(dcu>2040) dcu=2040;
64
    if     (dcv<0   ) dcv=0;
65
    else if(dcv>2040) dcv=2040;
66
    for(y=0; y<8; y++){
67
        int x;
68
        for(x=0; x<8; x++){
69
            dest_cb[x + y*(s->uvlinesize)]= dcu/8;
70
            dest_cr[x + y*(s->uvlinesize)]= dcv/8;
71
        }
72
    }
73
}
74

    
75
static void filter181(int16_t *data, int width, int height, int stride){
76
    int x,y;
77

    
78
    /* horizontal filter */
79
    for(y=1; y<height-1; y++){
80
        int prev_dc= data[0 + y*stride];
81

    
82
        for(x=1; x<width-1; x++){
83
            int dc;
84

    
85
            dc= - prev_dc
86
                + data[x     + y*stride]*8
87
                - data[x + 1 + y*stride];
88
            dc= (dc*10923 + 32768)>>16;
89
            prev_dc= data[x + y*stride];
90
            data[x + y*stride]= dc;
91
        }
92
    }
93

    
94
    /* vertical filter */
95
    for(x=1; x<width-1; x++){
96
        int prev_dc= data[x];
97

    
98
        for(y=1; y<height-1; y++){
99
            int dc;
100

    
101
            dc= - prev_dc
102
                + data[x +  y   *stride]*8
103
                - data[x + (y+1)*stride];
104
            dc= (dc*10923 + 32768)>>16;
105
            prev_dc= data[x + y*stride];
106
            data[x + y*stride]= dc;
107
        }
108
    }
109
}
110

    
111
/**
112
 * guess the dc of blocks which dont have a undamaged dc
113
 * @param w     width in 8 pixel blocks
114
 * @param h     height in 8 pixel blocks
115
 */
116
static void guess_dc(MpegEncContext *s, int16_t *dc, int w, int h, int stride, int is_luma){
117
    int b_x, b_y;
118

    
119
    for(b_y=0; b_y<h; b_y++){
120
        for(b_x=0; b_x<w; b_x++){
121
            int color[4]={1024,1024,1024,1024};
122
            int distance[4]={9999,9999,9999,9999};
123
            int mb_index, error, j;
124
            int64_t guess, weight_sum;
125

    
126
            mb_index= (b_x>>is_luma) + (b_y>>is_luma)*s->mb_stride;
127

    
128
            error= s->error_status_table[mb_index];
129

    
130
            if(IS_INTER(s->current_picture.mb_type[mb_index])) continue; //inter
131
            if(!(error&DC_ERROR)) continue;           //dc-ok
132

    
133
            /* right block */
134
            for(j=b_x+1; j<w; j++){
135
                int mb_index_j= (j>>is_luma) + (b_y>>is_luma)*s->mb_stride;
136
                int error_j= s->error_status_table[mb_index_j];
137
                int intra_j= IS_INTRA(s->current_picture.mb_type[mb_index_j]);
138
                if(intra_j==0 || !(error_j&DC_ERROR)){
139
                    color[0]= dc[j + b_y*stride];
140
                    distance[0]= j-b_x;
141
                    break;
142
                }
143
            }
144

    
145
            /* left block */
146
            for(j=b_x-1; j>=0; j--){
147
                int mb_index_j= (j>>is_luma) + (b_y>>is_luma)*s->mb_stride;
148
                int error_j= s->error_status_table[mb_index_j];
149
                int intra_j= IS_INTRA(s->current_picture.mb_type[mb_index_j]);
150
                if(intra_j==0 || !(error_j&DC_ERROR)){
151
                    color[1]= dc[j + b_y*stride];
152
                    distance[1]= b_x-j;
153
                    break;
154
                }
155
            }
156

    
157
            /* bottom block */
158
            for(j=b_y+1; j<h; j++){
159
                int mb_index_j= (b_x>>is_luma) + (j>>is_luma)*s->mb_stride;
160
                int error_j= s->error_status_table[mb_index_j];
161
                int intra_j= IS_INTRA(s->current_picture.mb_type[mb_index_j]);
162
                if(intra_j==0 || !(error_j&DC_ERROR)){
163
                    color[2]= dc[b_x + j*stride];
164
                    distance[2]= j-b_y;
165
                    break;
166
                }
167
            }
168

    
169
            /* top block */
170
            for(j=b_y-1; j>=0; j--){
171
                int mb_index_j= (b_x>>is_luma) + (j>>is_luma)*s->mb_stride;
172
                int error_j= s->error_status_table[mb_index_j];
173
                int intra_j= IS_INTRA(s->current_picture.mb_type[mb_index_j]);
174
                if(intra_j==0 || !(error_j&DC_ERROR)){
175
                    color[3]= dc[b_x + j*stride];
176
                    distance[3]= b_y-j;
177
                    break;
178
                }
179
            }
180

    
181
            weight_sum=0;
182
            guess=0;
183
            for(j=0; j<4; j++){
184
                int64_t weight= 256*256*256*16/distance[j];
185
                guess+= weight*(int64_t)color[j];
186
                weight_sum+= weight;
187
            }
188
            guess= (guess + weight_sum/2) / weight_sum;
189

    
190
            dc[b_x + b_y*stride]= guess;
191
        }
192
    }
193
}
194

    
195
/**
196
 * simple horizontal deblocking filter used for error resilience
197
 * @param w     width in 8 pixel blocks
198
 * @param h     height in 8 pixel blocks
199
 */
200
static void h_block_filter(MpegEncContext *s, uint8_t *dst, int w, int h, int stride, int is_luma){
201
    int b_x, b_y;
202
    uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
203

    
204
    for(b_y=0; b_y<h; b_y++){
205
        for(b_x=0; b_x<w-1; b_x++){
206
            int y;
207
            int left_status = s->error_status_table[( b_x   >>is_luma) + (b_y>>is_luma)*s->mb_stride];
208
            int right_status= s->error_status_table[((b_x+1)>>is_luma) + (b_y>>is_luma)*s->mb_stride];
209
            int left_intra=   IS_INTRA(s->current_picture.mb_type      [( b_x   >>is_luma) + (b_y>>is_luma)*s->mb_stride]);
210
            int right_intra=  IS_INTRA(s->current_picture.mb_type      [((b_x+1)>>is_luma) + (b_y>>is_luma)*s->mb_stride]);
211
            int left_damage =  left_status&(DC_ERROR|AC_ERROR|MV_ERROR);
212
            int right_damage= right_status&(DC_ERROR|AC_ERROR|MV_ERROR);
213
            int offset= b_x*8 + b_y*stride*8;
214
            int16_t *left_mv=  s->current_picture.motion_val[0][s->b8_stride*(b_y<<(1-is_luma)) + ( b_x   <<(1-is_luma))];
215
            int16_t *right_mv= s->current_picture.motion_val[0][s->b8_stride*(b_y<<(1-is_luma)) + ((b_x+1)<<(1-is_luma))];
216

    
217
            if(!(left_damage||right_damage)) continue; // both undamaged
218

    
219
            if(   (!left_intra) && (!right_intra)
220
               && FFABS(left_mv[0]-right_mv[0]) + FFABS(left_mv[1]+right_mv[1]) < 2) continue;
221

    
222
            for(y=0; y<8; y++){
223
                int a,b,c,d;
224

    
225
                a= dst[offset + 7 + y*stride] - dst[offset + 6 + y*stride];
226
                b= dst[offset + 8 + y*stride] - dst[offset + 7 + y*stride];
227
                c= dst[offset + 9 + y*stride] - dst[offset + 8 + y*stride];
228

    
229
                d= FFABS(b) - ((FFABS(a) + FFABS(c) + 1)>>1);
230
                d= FFMAX(d, 0);
231
                if(b<0) d= -d;
232

    
233
                if(d==0) continue;
234

    
235
                if(!(left_damage && right_damage))
236
                    d= d*16/9;
237

    
238
                if(left_damage){
239
                    dst[offset + 7 + y*stride] = cm[dst[offset + 7 + y*stride] + ((d*7)>>4)];
240
                    dst[offset + 6 + y*stride] = cm[dst[offset + 6 + y*stride] + ((d*5)>>4)];
241
                    dst[offset + 5 + y*stride] = cm[dst[offset + 5 + y*stride] + ((d*3)>>4)];
242
                    dst[offset + 4 + y*stride] = cm[dst[offset + 4 + y*stride] + ((d*1)>>4)];
243
                }
244
                if(right_damage){
245
                    dst[offset + 8 + y*stride] = cm[dst[offset + 8 + y*stride] - ((d*7)>>4)];
246
                    dst[offset + 9 + y*stride] = cm[dst[offset + 9 + y*stride] - ((d*5)>>4)];
247
                    dst[offset + 10+ y*stride] = cm[dst[offset +10 + y*stride] - ((d*3)>>4)];
248
                    dst[offset + 11+ y*stride] = cm[dst[offset +11 + y*stride] - ((d*1)>>4)];
249
                }
250
            }
251
        }
252
    }
253
}
254

    
255
/**
256
 * simple vertical deblocking filter used for error resilience
257
 * @param w     width in 8 pixel blocks
258
 * @param h     height in 8 pixel blocks
259
 */
260
static void v_block_filter(MpegEncContext *s, uint8_t *dst, int w, int h, int stride, int is_luma){
261
    int b_x, b_y;
262
    uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
263

    
264
    for(b_y=0; b_y<h-1; b_y++){
265
        for(b_x=0; b_x<w; b_x++){
266
            int x;
267
            int top_status   = s->error_status_table[(b_x>>is_luma) + ( b_y   >>is_luma)*s->mb_stride];
268
            int bottom_status= s->error_status_table[(b_x>>is_luma) + ((b_y+1)>>is_luma)*s->mb_stride];
269
            int top_intra=     IS_INTRA(s->current_picture.mb_type      [(b_x>>is_luma) + ( b_y   >>is_luma)*s->mb_stride]);
270
            int bottom_intra=  IS_INTRA(s->current_picture.mb_type      [(b_x>>is_luma) + ((b_y+1)>>is_luma)*s->mb_stride]);
271
            int top_damage =      top_status&(DC_ERROR|AC_ERROR|MV_ERROR);
272
            int bottom_damage= bottom_status&(DC_ERROR|AC_ERROR|MV_ERROR);
273
            int offset= b_x*8 + b_y*stride*8;
274
            int16_t *top_mv=    s->current_picture.motion_val[0][s->b8_stride*( b_y   <<(1-is_luma)) + (b_x<<(1-is_luma))];
275
            int16_t *bottom_mv= s->current_picture.motion_val[0][s->b8_stride*((b_y+1)<<(1-is_luma)) + (b_x<<(1-is_luma))];
276

    
277
            if(!(top_damage||bottom_damage)) continue; // both undamaged
278

    
279
            if(   (!top_intra) && (!bottom_intra)
280
               && FFABS(top_mv[0]-bottom_mv[0]) + FFABS(top_mv[1]+bottom_mv[1]) < 2) continue;
281

    
282
            for(x=0; x<8; x++){
283
                int a,b,c,d;
284

    
285
                a= dst[offset + x + 7*stride] - dst[offset + x + 6*stride];
286
                b= dst[offset + x + 8*stride] - dst[offset + x + 7*stride];
287
                c= dst[offset + x + 9*stride] - dst[offset + x + 8*stride];
288

    
289
                d= FFABS(b) - ((FFABS(a) + FFABS(c)+1)>>1);
290
                d= FFMAX(d, 0);
291
                if(b<0) d= -d;
292

    
293
                if(d==0) continue;
294

    
295
                if(!(top_damage && bottom_damage))
296
                    d= d*16/9;
297

    
298
                if(top_damage){
299
                    dst[offset + x +  7*stride] = cm[dst[offset + x +  7*stride] + ((d*7)>>4)];
300
                    dst[offset + x +  6*stride] = cm[dst[offset + x +  6*stride] + ((d*5)>>4)];
301
                    dst[offset + x +  5*stride] = cm[dst[offset + x +  5*stride] + ((d*3)>>4)];
302
                    dst[offset + x +  4*stride] = cm[dst[offset + x +  4*stride] + ((d*1)>>4)];
303
                }
304
                if(bottom_damage){
305
                    dst[offset + x +  8*stride] = cm[dst[offset + x +  8*stride] - ((d*7)>>4)];
306
                    dst[offset + x +  9*stride] = cm[dst[offset + x +  9*stride] - ((d*5)>>4)];
307
                    dst[offset + x + 10*stride] = cm[dst[offset + x + 10*stride] - ((d*3)>>4)];
308
                    dst[offset + x + 11*stride] = cm[dst[offset + x + 11*stride] - ((d*1)>>4)];
309
                }
310
            }
311
        }
312
    }
313
}
314

    
315
static void guess_mv(MpegEncContext *s){
316
    uint8_t fixed[s->mb_stride * s->mb_height];
317
#define MV_FROZEN    3
318
#define MV_CHANGED   2
319
#define MV_UNCHANGED 1
320
    const int mb_stride = s->mb_stride;
321
    const int mb_width = s->mb_width;
322
    const int mb_height= s->mb_height;
323
    int i, depth, num_avail;
324
    int mb_x, mb_y;
325

    
326
    num_avail=0;
327
    for(i=0; i<s->mb_num; i++){
328
        const int mb_xy= s->mb_index2xy[ i ];
329
        int f=0;
330
        int error= s->error_status_table[mb_xy];
331

    
332
        if(IS_INTRA(s->current_picture.mb_type[mb_xy])) f=MV_FROZEN; //intra //FIXME check
333
        if(!(error&MV_ERROR)) f=MV_FROZEN;           //inter with undamaged MV
334

    
335
        fixed[mb_xy]= f;
336
        if(f==MV_FROZEN)
337
            num_avail++;
338
    }
339

    
340
    if((!(s->avctx->error_concealment&FF_EC_GUESS_MVS)) || num_avail <= mb_width/2){
341
        for(mb_y=0; mb_y<s->mb_height; mb_y++){
342
            for(mb_x=0; mb_x<s->mb_width; mb_x++){
343
                const int mb_xy= mb_x + mb_y*s->mb_stride;
344

    
345
                if(IS_INTRA(s->current_picture.mb_type[mb_xy]))  continue;
346
                if(!(s->error_status_table[mb_xy]&MV_ERROR)) continue;
347

    
348
                s->mv_dir = MV_DIR_FORWARD;
349
                s->mb_intra=0;
350
                s->mv_type = MV_TYPE_16X16;
351
                s->mb_skipped=0;
352

    
353
                s->dsp.clear_blocks(s->block[0]);
354

    
355
                s->mb_x= mb_x;
356
                s->mb_y= mb_y;
357
                s->mv[0][0][0]= 0;
358
                s->mv[0][0][1]= 0;
359
                decode_mb(s);
360
            }
361
        }
362
        return;
363
    }
364

    
365
    for(depth=0;; depth++){
366
        int changed, pass, none_left;
367

    
368
        none_left=1;
369
        changed=1;
370
        for(pass=0; (changed || pass<2) && pass<10; pass++){
371
            int mb_x, mb_y;
372
int score_sum=0;
373

    
374
            changed=0;
375
            for(mb_y=0; mb_y<s->mb_height; mb_y++){
376
                for(mb_x=0; mb_x<s->mb_width; mb_x++){
377
                    const int mb_xy= mb_x + mb_y*s->mb_stride;
378
                    int mv_predictor[8][2]={{0}};
379
                    int pred_count=0;
380
                    int j;
381
                    int best_score=256*256*256*64;
382
                    int best_pred=0;
383
                    const int mot_stride= s->b8_stride;
384
                    const int mot_index= mb_x*2 + mb_y*2*mot_stride;
385
                    int prev_x= s->current_picture.motion_val[0][mot_index][0];
386
                    int prev_y= s->current_picture.motion_val[0][mot_index][1];
387

    
388
                    if((mb_x^mb_y^pass)&1) continue;
389

    
390
                    if(fixed[mb_xy]==MV_FROZEN) continue;
391
                    assert(!IS_INTRA(s->current_picture.mb_type[mb_xy]));
392
                    assert(s->last_picture_ptr && s->last_picture_ptr->data[0]);
393

    
394
                    j=0;
395
                    if(mb_x>0           && fixed[mb_xy-1        ]==MV_FROZEN) j=1;
396
                    if(mb_x+1<mb_width  && fixed[mb_xy+1        ]==MV_FROZEN) j=1;
397
                    if(mb_y>0           && fixed[mb_xy-mb_stride]==MV_FROZEN) j=1;
398
                    if(mb_y+1<mb_height && fixed[mb_xy+mb_stride]==MV_FROZEN) j=1;
399
                    if(j==0) continue;
400

    
401
                    j=0;
402
                    if(mb_x>0           && fixed[mb_xy-1        ]==MV_CHANGED) j=1;
403
                    if(mb_x+1<mb_width  && fixed[mb_xy+1        ]==MV_CHANGED) j=1;
404
                    if(mb_y>0           && fixed[mb_xy-mb_stride]==MV_CHANGED) j=1;
405
                    if(mb_y+1<mb_height && fixed[mb_xy+mb_stride]==MV_CHANGED) j=1;
406
                    if(j==0 && pass>1) continue;
407

    
408
                    none_left=0;
409

    
410
                    if(mb_x>0 && fixed[mb_xy-1]){
411
                        mv_predictor[pred_count][0]= s->current_picture.motion_val[0][mot_index - 2][0];
412
                        mv_predictor[pred_count][1]= s->current_picture.motion_val[0][mot_index - 2][1];
413
                        pred_count++;
414
                    }
415
                    if(mb_x+1<mb_width && fixed[mb_xy+1]){
416
                        mv_predictor[pred_count][0]= s->current_picture.motion_val[0][mot_index + 2][0];
417
                        mv_predictor[pred_count][1]= s->current_picture.motion_val[0][mot_index + 2][1];
418
                        pred_count++;
419
                    }
420
                    if(mb_y>0 && fixed[mb_xy-mb_stride]){
421
                        mv_predictor[pred_count][0]= s->current_picture.motion_val[0][mot_index - mot_stride*2][0];
422
                        mv_predictor[pred_count][1]= s->current_picture.motion_val[0][mot_index - mot_stride*2][1];
423
                        pred_count++;
424
                    }
425
                    if(mb_y+1<mb_height && fixed[mb_xy+mb_stride]){
426
                        mv_predictor[pred_count][0]= s->current_picture.motion_val[0][mot_index + mot_stride*2][0];
427
                        mv_predictor[pred_count][1]= s->current_picture.motion_val[0][mot_index + mot_stride*2][1];
428
                        pred_count++;
429
                    }
430
                    if(pred_count==0) continue;
431

    
432
                    if(pred_count>1){
433
                        int sum_x=0, sum_y=0;
434
                        int max_x, max_y, min_x, min_y;
435

    
436
                        for(j=0; j<pred_count; j++){
437
                            sum_x+= mv_predictor[j][0];
438
                            sum_y+= mv_predictor[j][1];
439
                        }
440

    
441
                        /* mean */
442
                        mv_predictor[pred_count][0] = sum_x/j;
443
                        mv_predictor[pred_count][1] = sum_y/j;
444

    
445
                        /* median */
446
                        if(pred_count>=3){
447
                            min_y= min_x= 99999;
448
                            max_y= max_x=-99999;
449
                        }else{
450
                            min_x=min_y=max_x=max_y=0;
451
                        }
452
                        for(j=0; j<pred_count; j++){
453
                            max_x= FFMAX(max_x, mv_predictor[j][0]);
454
                            max_y= FFMAX(max_y, mv_predictor[j][1]);
455
                            min_x= FFMIN(min_x, mv_predictor[j][0]);
456
                            min_y= FFMIN(min_y, mv_predictor[j][1]);
457
                        }
458
                        mv_predictor[pred_count+1][0] = sum_x - max_x - min_x;
459
                        mv_predictor[pred_count+1][1] = sum_y - max_y - min_y;
460

    
461
                        if(pred_count==4){
462
                            mv_predictor[pred_count+1][0] /= 2;
463
                            mv_predictor[pred_count+1][1] /= 2;
464
                        }
465
                        pred_count+=2;
466
                    }
467

    
468
                    /* zero MV */
469
                    pred_count++;
470

    
471
                    /* last MV */
472
                    mv_predictor[pred_count][0]= s->current_picture.motion_val[0][mot_index][0];
473
                    mv_predictor[pred_count][1]= s->current_picture.motion_val[0][mot_index][1];
474
                    pred_count++;
475

    
476
                    s->mv_dir = MV_DIR_FORWARD;
477
                    s->mb_intra=0;
478
                    s->mv_type = MV_TYPE_16X16;
479
                    s->mb_skipped=0;
480

    
481
                    s->dsp.clear_blocks(s->block[0]);
482

    
483
                    s->mb_x= mb_x;
484
                    s->mb_y= mb_y;
485

    
486
                    for(j=0; j<pred_count; j++){
487
                        int score=0;
488
                        uint8_t *src= s->current_picture.data[0] + mb_x*16 + mb_y*16*s->linesize;
489

    
490
                        s->current_picture.motion_val[0][mot_index][0]= s->mv[0][0][0]= mv_predictor[j][0];
491
                        s->current_picture.motion_val[0][mot_index][1]= s->mv[0][0][1]= mv_predictor[j][1];
492

    
493
                        decode_mb(s);
494

    
495
                        if(mb_x>0 && fixed[mb_xy-1]){
496
                            int k;
497
                            for(k=0; k<16; k++)
498
                                score += FFABS(src[k*s->linesize-1 ]-src[k*s->linesize   ]);
499
                        }
500
                        if(mb_x+1<mb_width && fixed[mb_xy+1]){
501
                            int k;
502
                            for(k=0; k<16; k++)
503
                                score += FFABS(src[k*s->linesize+15]-src[k*s->linesize+16]);
504
                        }
505
                        if(mb_y>0 && fixed[mb_xy-mb_stride]){
506
                            int k;
507
                            for(k=0; k<16; k++)
508
                                score += FFABS(src[k-s->linesize   ]-src[k               ]);
509
                        }
510
                        if(mb_y+1<mb_height && fixed[mb_xy+mb_stride]){
511
                            int k;
512
                            for(k=0; k<16; k++)
513
                                score += FFABS(src[k+s->linesize*15]-src[k+s->linesize*16]);
514
                        }
515

    
516
                        if(score <= best_score){ // <= will favor the last MV
517
                            best_score= score;
518
                            best_pred= j;
519
                        }
520
                    }
521
score_sum+= best_score;
522
//FIXME no need to set s->current_picture.motion_val[0][mot_index][0] explicit
523
                    s->current_picture.motion_val[0][mot_index][0]= s->mv[0][0][0]= mv_predictor[best_pred][0];
524
                    s->current_picture.motion_val[0][mot_index][1]= s->mv[0][0][1]= mv_predictor[best_pred][1];
525

    
526
                    decode_mb(s);
527

    
528

    
529
                    if(s->mv[0][0][0] != prev_x || s->mv[0][0][1] != prev_y){
530
                        fixed[mb_xy]=MV_CHANGED;
531
                        changed++;
532
                    }else
533
                        fixed[mb_xy]=MV_UNCHANGED;
534
                }
535
            }
536

    
537
//            printf(".%d/%d", changed, score_sum); fflush(stdout);
538
        }
539

    
540
        if(none_left)
541
            return;
542

    
543
        for(i=0; i<s->mb_num; i++){
544
            int mb_xy= s->mb_index2xy[i];
545
            if(fixed[mb_xy])
546
                fixed[mb_xy]=MV_FROZEN;
547
        }
548
//        printf(":"); fflush(stdout);
549
    }
550
}
551

    
552
static int is_intra_more_likely(MpegEncContext *s){
553
    int is_intra_likely, i, j, undamaged_count, skip_amount, mb_x, mb_y;
554

    
555
    if(s->last_picture_ptr==NULL) return 1; //no previous frame available -> use spatial prediction
556

    
557
    undamaged_count=0;
558
    for(i=0; i<s->mb_num; i++){
559
        const int mb_xy= s->mb_index2xy[i];
560
        const int error= s->error_status_table[mb_xy];
561
        if(!((error&DC_ERROR) && (error&MV_ERROR)))
562
            undamaged_count++;
563
    }
564

    
565
    if(undamaged_count < 5) return 0; //allmost all MBs damaged -> use temporal prediction
566

    
567
    skip_amount= FFMAX(undamaged_count/50, 1); //check only upto 50 MBs
568
    is_intra_likely=0;
569

    
570
    j=0;
571
    for(mb_y= 0; mb_y<s->mb_height-1; mb_y++){
572
        for(mb_x= 0; mb_x<s->mb_width; mb_x++){
573
            int error;
574
            const int mb_xy= mb_x + mb_y*s->mb_stride;
575

    
576
            error= s->error_status_table[mb_xy];
577
            if((error&DC_ERROR) && (error&MV_ERROR))
578
                continue; //skip damaged
579

    
580
            j++;
581
            if((j%skip_amount) != 0) continue; //skip a few to speed things up
582

    
583
            if(s->pict_type==I_TYPE){
584
                uint8_t *mb_ptr     = s->current_picture.data[0] + mb_x*16 + mb_y*16*s->linesize;
585
                uint8_t *last_mb_ptr= s->last_picture.data   [0] + mb_x*16 + mb_y*16*s->linesize;
586

    
587
                is_intra_likely += s->dsp.sad[0](NULL, last_mb_ptr, mb_ptr                    , s->linesize, 16);
588
                is_intra_likely -= s->dsp.sad[0](NULL, last_mb_ptr, last_mb_ptr+s->linesize*16, s->linesize, 16);
589
            }else{
590
                if(IS_INTRA(s->current_picture.mb_type[mb_xy]))
591
                   is_intra_likely++;
592
                else
593
                   is_intra_likely--;
594
            }
595
        }
596
    }
597
//printf("is_intra_likely: %d type:%d\n", is_intra_likely, s->pict_type);
598
    return is_intra_likely > 0;
599
}
600

    
601
void ff_er_frame_start(MpegEncContext *s){
602
    if(!s->error_resilience) return;
603

    
604
    memset(s->error_status_table, MV_ERROR|AC_ERROR|DC_ERROR|VP_START|AC_END|DC_END|MV_END, s->mb_stride*s->mb_height*sizeof(uint8_t));
605
    s->error_count= 3*s->mb_num;
606
}
607

    
608
/**
609
 * adds a slice.
610
 * @param endx x component of the last macroblock, can be -1 for the last of the previous line
611
 * @param status the status at the end (MV_END, AC_ERROR, ...), it is assumed that no earlier end or
612
 *               error of the same type occured
613
 */
614
void ff_er_add_slice(MpegEncContext *s, int startx, int starty, int endx, int endy, int status){
615
    const int start_i= av_clip(startx + starty * s->mb_width    , 0, s->mb_num-1);
616
    const int end_i  = av_clip(endx   + endy   * s->mb_width    , 0, s->mb_num);
617
    const int start_xy= s->mb_index2xy[start_i];
618
    const int end_xy  = s->mb_index2xy[end_i];
619
    int mask= -1;
620

    
621
    if(start_i > end_i || start_xy > end_xy){
622
        av_log(s->avctx, AV_LOG_ERROR, "internal error, slice end before start\n");
623
        return;
624
    }
625

    
626
    if(!s->error_resilience) return;
627

    
628
    mask &= ~VP_START;
629
    if(status & (AC_ERROR|AC_END)){
630
        mask &= ~(AC_ERROR|AC_END);
631
        s->error_count -= end_i - start_i + 1;
632
    }
633
    if(status & (DC_ERROR|DC_END)){
634
        mask &= ~(DC_ERROR|DC_END);
635
        s->error_count -= end_i - start_i + 1;
636
    }
637
    if(status & (MV_ERROR|MV_END)){
638
        mask &= ~(MV_ERROR|MV_END);
639
        s->error_count -= end_i - start_i + 1;
640
    }
641

    
642
    if(status & (AC_ERROR|DC_ERROR|MV_ERROR)) s->error_count= INT_MAX;
643

    
644
    if(mask == ~0x7F){
645
        memset(&s->error_status_table[start_xy], 0, (end_xy - start_xy) * sizeof(uint8_t));
646
    }else{
647
        int i;
648
        for(i=start_xy; i<end_xy; i++){
649
            s->error_status_table[ i ] &= mask;
650
        }
651
    }
652

    
653
    if(end_i == s->mb_num)
654
        s->error_count= INT_MAX;
655
    else{
656
        s->error_status_table[end_xy] &= mask;
657
        s->error_status_table[end_xy] |= status;
658
    }
659

    
660
    s->error_status_table[start_xy] |= VP_START;
661

    
662
    if(start_xy > 0 && s->avctx->thread_count <= 1 && s->avctx->skip_top*s->mb_width < start_i){
663
        int prev_status= s->error_status_table[ s->mb_index2xy[start_i - 1] ];
664

    
665
        prev_status &= ~ VP_START;
666
        if(prev_status != (MV_END|DC_END|AC_END)) s->error_count= INT_MAX;
667
    }
668
}
669

    
670
void ff_er_frame_end(MpegEncContext *s){
671
    int i, mb_x, mb_y, error, error_type, dc_error, mv_error, ac_error;
672
    int distance;
673
    int threshold_part[4]= {100,100,100};
674
    int threshold= 50;
675
    int is_intra_likely;
676
    int size = s->b8_stride * 2 * s->mb_height;
677
    Picture *pic= s->current_picture_ptr;
678

    
679
    if(!s->error_resilience || s->error_count==0 ||
680
       s->error_count==3*s->mb_width*(s->avctx->skip_top + s->avctx->skip_bottom)) return;
681

    
682
    if(s->current_picture.motion_val[0] == NULL){
683
        av_log(s->avctx, AV_LOG_ERROR, "Warning MVs not available\n");
684

    
685
        for(i=0; i<2; i++){
686
            pic->ref_index[i]= av_mallocz(size * sizeof(uint8_t));
687
            pic->motion_val_base[i]= av_mallocz((size+4) * 2 * sizeof(uint16_t));
688
            pic->motion_val[i]= pic->motion_val_base[i]+4;
689
        }
690
        pic->motion_subsample_log2= 3;
691
        s->current_picture= *s->current_picture_ptr;
692
    }
693

    
694
    for(i=0; i<2; i++){
695
        if(pic->ref_index[i])
696
            memset(pic->ref_index[i], 0, size * sizeof(uint8_t));
697
    }
698

    
699
    if(s->avctx->debug&FF_DEBUG_ER){
700
        for(mb_y=0; mb_y<s->mb_height; mb_y++){
701
            for(mb_x=0; mb_x<s->mb_width; mb_x++){
702
                int status= s->error_status_table[mb_x + mb_y*s->mb_stride];
703

    
704
                av_log(s->avctx, AV_LOG_DEBUG, "%2X ", status);
705
            }
706
            av_log(s->avctx, AV_LOG_DEBUG, "\n");
707
        }
708
    }
709

    
710
#if 1
711
    /* handle overlapping slices */
712
    for(error_type=1; error_type<=3; error_type++){
713
        int end_ok=0;
714

    
715
        for(i=s->mb_num-1; i>=0; i--){
716
            const int mb_xy= s->mb_index2xy[i];
717
            int error= s->error_status_table[mb_xy];
718

    
719
            if(error&(1<<error_type))
720
                end_ok=1;
721
            if(error&(8<<error_type))
722
                end_ok=1;
723

    
724
            if(!end_ok)
725
                s->error_status_table[mb_xy]|= 1<<error_type;
726

    
727
            if(error&VP_START)
728
                end_ok=0;
729
        }
730
    }
731
#endif
732
#if 1
733
    /* handle slices with partitions of different length */
734
    if(s->partitioned_frame){
735
        int end_ok=0;
736

    
737
        for(i=s->mb_num-1; i>=0; i--){
738
            const int mb_xy= s->mb_index2xy[i];
739
            int error= s->error_status_table[mb_xy];
740

    
741
            if(error&AC_END)
742
                end_ok=0;
743
            if((error&MV_END) || (error&DC_END) || (error&AC_ERROR))
744
                end_ok=1;
745

    
746
            if(!end_ok)
747
                s->error_status_table[mb_xy]|= AC_ERROR;
748

    
749
            if(error&VP_START)
750
                end_ok=0;
751
        }
752
    }
753
#endif
754
    /* handle missing slices */
755
    if(s->error_resilience>=4){
756
        int end_ok=1;
757

    
758
        for(i=s->mb_num-2; i>=s->mb_width+100; i--){ //FIXME +100 hack
759
            const int mb_xy= s->mb_index2xy[i];
760
            int error1= s->error_status_table[mb_xy  ];
761
            int error2= s->error_status_table[s->mb_index2xy[i+1]];
762

    
763
            if(error1&VP_START)
764
                end_ok=1;
765

    
766
            if(   error2==(VP_START|DC_ERROR|AC_ERROR|MV_ERROR|AC_END|DC_END|MV_END)
767
               && error1!=(VP_START|DC_ERROR|AC_ERROR|MV_ERROR|AC_END|DC_END|MV_END)
768
               && ((error1&AC_END) || (error1&DC_END) || (error1&MV_END))){ //end & uninited
769
                end_ok=0;
770
            }
771

    
772
            if(!end_ok)
773
                s->error_status_table[mb_xy]|= DC_ERROR|AC_ERROR|MV_ERROR;
774
        }
775
    }
776

    
777
#if 1
778
    /* backward mark errors */
779
    distance=9999999;
780
    for(error_type=1; error_type<=3; error_type++){
781
        for(i=s->mb_num-1; i>=0; i--){
782
            const int mb_xy= s->mb_index2xy[i];
783
            int error= s->error_status_table[mb_xy];
784

    
785
            if(!s->mbskip_table[mb_xy]) //FIXME partition specific
786
                distance++;
787
            if(error&(1<<error_type))
788
                distance= 0;
789

    
790
            if(s->partitioned_frame){
791
                if(distance < threshold_part[error_type-1])
792
                    s->error_status_table[mb_xy]|= 1<<error_type;
793
            }else{
794
                if(distance < threshold)
795
                    s->error_status_table[mb_xy]|= 1<<error_type;
796
            }
797

    
798
            if(error&VP_START)
799
                distance= 9999999;
800
        }
801
    }
802
#endif
803

    
804
    /* forward mark errors */
805
    error=0;
806
    for(i=0; i<s->mb_num; i++){
807
        const int mb_xy= s->mb_index2xy[i];
808
        int old_error= s->error_status_table[mb_xy];
809

    
810
        if(old_error&VP_START)
811
            error= old_error& (DC_ERROR|AC_ERROR|MV_ERROR);
812
        else{
813
            error|= old_error& (DC_ERROR|AC_ERROR|MV_ERROR);
814
            s->error_status_table[mb_xy]|= error;
815
        }
816
    }
817
#if 1
818
    /* handle not partitioned case */
819
    if(!s->partitioned_frame){
820
        for(i=0; i<s->mb_num; i++){
821
            const int mb_xy= s->mb_index2xy[i];
822
            error= s->error_status_table[mb_xy];
823
            if(error&(AC_ERROR|DC_ERROR|MV_ERROR))
824
                error|= AC_ERROR|DC_ERROR|MV_ERROR;
825
            s->error_status_table[mb_xy]= error;
826
        }
827
    }
828
#endif
829

    
830
    dc_error= ac_error= mv_error=0;
831
    for(i=0; i<s->mb_num; i++){
832
        const int mb_xy= s->mb_index2xy[i];
833
        error= s->error_status_table[mb_xy];
834
        if(error&DC_ERROR) dc_error ++;
835
        if(error&AC_ERROR) ac_error ++;
836
        if(error&MV_ERROR) mv_error ++;
837
    }
838
    av_log(s->avctx, AV_LOG_INFO, "concealing %d DC, %d AC, %d MV errors\n", dc_error, ac_error, mv_error);
839

    
840
    is_intra_likely= is_intra_more_likely(s);
841

    
842
    /* set unknown mb-type to most likely */
843
    for(i=0; i<s->mb_num; i++){
844
        const int mb_xy= s->mb_index2xy[i];
845
        error= s->error_status_table[mb_xy];
846
        if(!((error&DC_ERROR) && (error&MV_ERROR)))
847
            continue;
848

    
849
        if(is_intra_likely)
850
            s->current_picture.mb_type[mb_xy]= MB_TYPE_INTRA4x4;
851
        else
852
            s->current_picture.mb_type[mb_xy]= MB_TYPE_16x16 | MB_TYPE_L0;
853
    }
854

    
855
    /* handle inter blocks with damaged AC */
856
    for(mb_y=0; mb_y<s->mb_height; mb_y++){
857
        for(mb_x=0; mb_x<s->mb_width; mb_x++){
858
            const int mb_xy= mb_x + mb_y * s->mb_stride;
859
            const int mb_type= s->current_picture.mb_type[mb_xy];
860
            error= s->error_status_table[mb_xy];
861

    
862
            if(IS_INTRA(mb_type)) continue; //intra
863
            if(error&MV_ERROR) continue;              //inter with damaged MV
864
            if(!(error&AC_ERROR)) continue;           //undamaged inter
865

    
866
            s->mv_dir = MV_DIR_FORWARD;
867
            s->mb_intra=0;
868
            s->mb_skipped=0;
869
            if(IS_8X8(mb_type)){
870
                int mb_index= mb_x*2 + mb_y*2*s->b8_stride;
871
                int j;
872
                s->mv_type = MV_TYPE_8X8;
873
                for(j=0; j<4; j++){
874
                    s->mv[0][j][0] = s->current_picture.motion_val[0][ mb_index + (j&1) + (j>>1)*s->b8_stride ][0];
875
                    s->mv[0][j][1] = s->current_picture.motion_val[0][ mb_index + (j&1) + (j>>1)*s->b8_stride ][1];
876
                }
877
            }else{
878
                s->mv_type = MV_TYPE_16X16;
879
                s->mv[0][0][0] = s->current_picture.motion_val[0][ mb_x*2 + mb_y*2*s->b8_stride ][0];
880
                s->mv[0][0][1] = s->current_picture.motion_val[0][ mb_x*2 + mb_y*2*s->b8_stride ][1];
881
            }
882

    
883
            s->dsp.clear_blocks(s->block[0]);
884

    
885
            s->mb_x= mb_x;
886
            s->mb_y= mb_y;
887
            decode_mb(s);
888
        }
889
    }
890

    
891
    /* guess MVs */
892
    if(s->pict_type==B_TYPE){
893
        for(mb_y=0; mb_y<s->mb_height; mb_y++){
894
            for(mb_x=0; mb_x<s->mb_width; mb_x++){
895
                int xy= mb_x*2 + mb_y*2*s->b8_stride;
896
                const int mb_xy= mb_x + mb_y * s->mb_stride;
897
                const int mb_type= s->current_picture.mb_type[mb_xy];
898
                error= s->error_status_table[mb_xy];
899

    
900
                if(IS_INTRA(mb_type)) continue;
901
                if(!(error&MV_ERROR)) continue;           //inter with undamaged MV
902
                if(!(error&AC_ERROR)) continue;           //undamaged inter
903

    
904
                s->mv_dir = MV_DIR_FORWARD|MV_DIR_BACKWARD;
905
                s->mb_intra=0;
906
                s->mv_type = MV_TYPE_16X16;
907
                s->mb_skipped=0;
908

    
909
                if(s->pp_time){
910
                    int time_pp= s->pp_time;
911
                    int time_pb= s->pb_time;
912

    
913
                    s->mv[0][0][0] = s->next_picture.motion_val[0][xy][0]*time_pb/time_pp;
914
                    s->mv[0][0][1] = s->next_picture.motion_val[0][xy][1]*time_pb/time_pp;
915
                    s->mv[1][0][0] = s->next_picture.motion_val[0][xy][0]*(time_pb - time_pp)/time_pp;
916
                    s->mv[1][0][1] = s->next_picture.motion_val[0][xy][1]*(time_pb - time_pp)/time_pp;
917
                }else{
918
                    s->mv[0][0][0]= 0;
919
                    s->mv[0][0][1]= 0;
920
                    s->mv[1][0][0]= 0;
921
                    s->mv[1][0][1]= 0;
922
                }
923

    
924
                s->dsp.clear_blocks(s->block[0]);
925
                s->mb_x= mb_x;
926
                s->mb_y= mb_y;
927
                decode_mb(s);
928
            }
929
        }
930
    }else
931
        guess_mv(s);
932

    
933
#ifdef HAVE_XVMC
934
    /* the filters below are not XvMC compatible, skip them */
935
    if(s->avctx->xvmc_acceleration) goto ec_clean;
936
#endif
937
    /* fill DC for inter blocks */
938
    for(mb_y=0; mb_y<s->mb_height; mb_y++){
939
        for(mb_x=0; mb_x<s->mb_width; mb_x++){
940
            int dc, dcu, dcv, y, n;
941
            int16_t *dc_ptr;
942
            uint8_t *dest_y, *dest_cb, *dest_cr;
943
            const int mb_xy= mb_x + mb_y * s->mb_stride;
944
            const int mb_type= s->current_picture.mb_type[mb_xy];
945

    
946
            error= s->error_status_table[mb_xy];
947

    
948
            if(IS_INTRA(mb_type) && s->partitioned_frame) continue;
949
//            if(error&MV_ERROR) continue; //inter data damaged FIXME is this good?
950

    
951
            dest_y = s->current_picture.data[0] + mb_x*16 + mb_y*16*s->linesize;
952
            dest_cb= s->current_picture.data[1] + mb_x*8  + mb_y*8 *s->uvlinesize;
953
            dest_cr= s->current_picture.data[2] + mb_x*8  + mb_y*8 *s->uvlinesize;
954

    
955
            dc_ptr= &s->dc_val[0][mb_x*2 + mb_y*2*s->b8_stride];
956
            for(n=0; n<4; n++){
957
                dc=0;
958
                for(y=0; y<8; y++){
959
                    int x;
960
                    for(x=0; x<8; x++){
961
                       dc+= dest_y[x + (n&1)*8 + (y + (n>>1)*8)*s->linesize];
962
                    }
963
                }
964
                dc_ptr[(n&1) + (n>>1)*s->b8_stride]= (dc+4)>>3;
965
            }
966

    
967
            dcu=dcv=0;
968
            for(y=0; y<8; y++){
969
                int x;
970
                for(x=0; x<8; x++){
971
                    dcu+=dest_cb[x + y*(s->uvlinesize)];
972
                    dcv+=dest_cr[x + y*(s->uvlinesize)];
973
                }
974
            }
975
            s->dc_val[1][mb_x + mb_y*s->mb_stride]= (dcu+4)>>3;
976
            s->dc_val[2][mb_x + mb_y*s->mb_stride]= (dcv+4)>>3;
977
        }
978
    }
979
#if 1
980
    /* guess DC for damaged blocks */
981
    guess_dc(s, s->dc_val[0], s->mb_width*2, s->mb_height*2, s->b8_stride, 1);
982
    guess_dc(s, s->dc_val[1], s->mb_width  , s->mb_height  , s->mb_stride, 0);
983
    guess_dc(s, s->dc_val[2], s->mb_width  , s->mb_height  , s->mb_stride, 0);
984
#endif
985
    /* filter luma DC */
986
    filter181(s->dc_val[0], s->mb_width*2, s->mb_height*2, s->b8_stride);
987

    
988
#if 1
989
    /* render DC only intra */
990
    for(mb_y=0; mb_y<s->mb_height; mb_y++){
991
        for(mb_x=0; mb_x<s->mb_width; mb_x++){
992
            uint8_t *dest_y, *dest_cb, *dest_cr;
993
            const int mb_xy= mb_x + mb_y * s->mb_stride;
994
            const int mb_type= s->current_picture.mb_type[mb_xy];
995

    
996
            error= s->error_status_table[mb_xy];
997

    
998
            if(IS_INTER(mb_type)) continue;
999
            if(!(error&AC_ERROR)) continue;              //undamaged
1000

    
1001
            dest_y = s->current_picture.data[0] + mb_x*16 + mb_y*16*s->linesize;
1002
            dest_cb= s->current_picture.data[1] + mb_x*8  + mb_y*8 *s->uvlinesize;
1003
            dest_cr= s->current_picture.data[2] + mb_x*8  + mb_y*8 *s->uvlinesize;
1004

    
1005
            put_dc(s, dest_y, dest_cb, dest_cr, mb_x, mb_y);
1006
        }
1007
    }
1008
#endif
1009

    
1010
    if(s->avctx->error_concealment&FF_EC_DEBLOCK){
1011
        /* filter horizontal block boundaries */
1012
        h_block_filter(s, s->current_picture.data[0], s->mb_width*2, s->mb_height*2, s->linesize  , 1);
1013
        h_block_filter(s, s->current_picture.data[1], s->mb_width  , s->mb_height  , s->uvlinesize, 0);
1014
        h_block_filter(s, s->current_picture.data[2], s->mb_width  , s->mb_height  , s->uvlinesize, 0);
1015

    
1016
        /* filter vertical block boundaries */
1017
        v_block_filter(s, s->current_picture.data[0], s->mb_width*2, s->mb_height*2, s->linesize  , 1);
1018
        v_block_filter(s, s->current_picture.data[1], s->mb_width  , s->mb_height  , s->uvlinesize, 0);
1019
        v_block_filter(s, s->current_picture.data[2], s->mb_width  , s->mb_height  , s->uvlinesize, 0);
1020
    }
1021

    
1022
#ifdef HAVE_XVMC
1023
ec_clean:
1024
#endif
1025
    /* clean a few tables */
1026
    for(i=0; i<s->mb_num; i++){
1027
        const int mb_xy= s->mb_index2xy[i];
1028
        int error= s->error_status_table[mb_xy];
1029

    
1030
        if(s->pict_type!=B_TYPE && (error&(DC_ERROR|MV_ERROR|AC_ERROR))){
1031
            s->mbskip_table[mb_xy]=0;
1032
        }
1033
        s->mbintra_table[mb_xy]=1;
1034
    }
1035
}