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