FFmpeg
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error_resilience.c
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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 "libavutil/avassert.h"
31#include "libavutil/attributes.h"
32#include "libavutil/mem.h"
33#include "avcodec.h"
34#include "error_resilience.h"
35#include "mathops.h"
36#include "me_cmp.h"
37#include "mpegutils.h"
38#include "mpegvideo.h"
39#include "threadframe.h"
40#include "threadprogress.h"
41
42av_cold int ff_er_init(ERContext *const s)
43{
44 MECmpContext mecc;
45 unsigned mb_array_size = s->mb_height * s->mb_stride;
46
47 s->error_status_table = av_mallocz(mb_array_size);
48 if (!s->error_status_table)
49 return AVERROR(ENOMEM);
50 s->er_temp_buffer = av_malloc_array(mb_array_size, 4*sizeof(int) + 1);
51 if (!s->er_temp_buffer)
52 return AVERROR(ENOMEM);
53
54 ff_me_cmp_init(&mecc, s->avctx);
55 s->sad = mecc.sad[0];
56
57 return 0;
58}
59
60/**
61 * @param stride the number of MVs to get to the next row
62 * @param mv_step the number of MVs per row or column in a macroblock
63 */
64static void set_mv_strides(ERContext *s, ptrdiff_t *mv_step, ptrdiff_t *stride)
65{
66 if (s->avctx->codec_id == AV_CODEC_ID_H264) {
67 av_assert0(s->quarter_sample);
68 *mv_step = 4;
69 *stride = s->mb_width * 4;
70 } else {
71 *mv_step = 2;
72 *stride = s->b8_stride;
73 }
74}
75
76/**
77 * Replace the current MB with a flat dc-only version.
78 */
79static void put_dc(ERContext *s, uint8_t *dest_y, uint8_t *dest_cb,
80 uint8_t *dest_cr, int mb_x, int mb_y)
81{
82 int *linesize = s->cur_pic.f->linesize;
83 int dc, dcu, dcv, y, i;
84 for (i = 0; i < 4; i++) {
85 dc = s->dc_val[0][mb_x * 2 + (i & 1) + (mb_y * 2 + (i >> 1)) * s->b8_stride];
86 if (dc < 0)
87 dc = 0;
88 else if (dc > 2040)
89 dc = 2040;
90 for (y = 0; y < 8; y++) {
91 int x;
92 for (x = 0; x < 8; x++)
93 dest_y[x + (i & 1) * 8 + (y + (i >> 1) * 8) * linesize[0]] = dc / 8;
94 }
95 }
96 dcu = s->dc_val[1][mb_x + mb_y * s->mb_stride];
97 dcv = s->dc_val[2][mb_x + mb_y * s->mb_stride];
98 if (dcu < 0)
99 dcu = 0;
100 else if (dcu > 2040)
101 dcu = 2040;
102 if (dcv < 0)
103 dcv = 0;
104 else if (dcv > 2040)
105 dcv = 2040;
106
107 if (dest_cr)
108 for (y = 0; y < 8; y++) {
109 int x;
110 for (x = 0; x < 8; x++) {
111 dest_cb[x + y * linesize[1]] = dcu / 8;
112 dest_cr[x + y * linesize[2]] = dcv / 8;
113 }
114 }
115}
116
117static void filter181(int16_t *data, int width, int height, ptrdiff_t stride)
118{
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 dc = -prev_dc +
128 data[x + y * stride] * 8 -
129 data[x + 1 + y * stride];
130 dc = (av_clip(dc, INT_MIN/10923, INT_MAX/10923 - 32768) * 10923 + 32768) >> 16;
131 prev_dc = data[x + y * stride];
132 data[x + y * stride] = dc;
133 }
134 }
135
136 /* vertical filter */
137 for (x = 1; x < width - 1; x++) {
138 int prev_dc = data[x];
139
140 for (y = 1; y < height - 1; y++) {
141 int dc;
142
143 dc = -prev_dc +
144 data[x + y * stride] * 8 -
145 data[x + (y + 1) * stride];
146 dc = (av_clip(dc, INT_MIN/10923, INT_MAX/10923 - 32768) * 10923 + 32768) >> 16;
147 prev_dc = data[x + y * stride];
148 data[x + y * stride] = dc;
149 }
150 }
151}
152
153/**
154 * guess the dc of blocks which do not have an undamaged dc
155 * @param w width in 8 pixel blocks
156 * @param h height in 8 pixel blocks
157 */
158static void guess_dc(ERContext *s, int16_t *dc, int w,
159 int h, ptrdiff_t stride, int is_luma)
160{
161 int b_x, b_y;
162 int16_t (*col )[4] = av_malloc_array(stride, h*sizeof( int16_t)*4);
163 uint32_t (*dist)[4] = av_malloc_array(stride, h*sizeof(uint32_t)*4);
164
165 if(!col || !dist) {
166 av_log(s->avctx, AV_LOG_ERROR, "guess_dc() is out of memory\n");
167 goto fail;
168 }
169
170 for(b_y=0; b_y<h; b_y++){
171 int color= 1024;
172 int distance= -1;
173 for(b_x=0; b_x<w; b_x++){
174 int mb_index_j= (b_x>>is_luma) + (b_y>>is_luma)*s->mb_stride;
175 int error_j= s->error_status_table[mb_index_j];
176 int intra_j = IS_INTRA(s->cur_pic.mb_type[mb_index_j]);
177 if(intra_j==0 || !(error_j&ER_DC_ERROR)){
178 color= dc[b_x + b_y*stride];
179 distance= b_x;
180 }
181 col [b_x + b_y*stride][1]= color;
182 dist[b_x + b_y*stride][1]= distance >= 0 ? b_x-distance : 9999;
183 }
184 color= 1024;
185 distance= -1;
186 for(b_x=w-1; b_x>=0; b_x--){
187 int mb_index_j= (b_x>>is_luma) + (b_y>>is_luma)*s->mb_stride;
188 int error_j= s->error_status_table[mb_index_j];
189 int intra_j = IS_INTRA(s->cur_pic.mb_type[mb_index_j]);
190 if(intra_j==0 || !(error_j&ER_DC_ERROR)){
191 color= dc[b_x + b_y*stride];
192 distance= b_x;
193 }
194 col [b_x + b_y*stride][0]= color;
195 dist[b_x + b_y*stride][0]= distance >= 0 ? distance-b_x : 9999;
196 }
197 }
198 for(b_x=0; b_x<w; b_x++){
199 int color= 1024;
200 int distance= -1;
201 for(b_y=0; b_y<h; b_y++){
202 int mb_index_j= (b_x>>is_luma) + (b_y>>is_luma)*s->mb_stride;
203 int error_j= s->error_status_table[mb_index_j];
204 int intra_j = IS_INTRA(s->cur_pic.mb_type[mb_index_j]);
205 if(intra_j==0 || !(error_j&ER_DC_ERROR)){
206 color= dc[b_x + b_y*stride];
207 distance= b_y;
208 }
209 col [b_x + b_y*stride][3]= color;
210 dist[b_x + b_y*stride][3]= distance >= 0 ? b_y-distance : 9999;
211 }
212 color= 1024;
213 distance= -1;
214 for(b_y=h-1; b_y>=0; b_y--){
215 int mb_index_j= (b_x>>is_luma) + (b_y>>is_luma)*s->mb_stride;
216 int error_j= s->error_status_table[mb_index_j];
217 int intra_j = IS_INTRA(s->cur_pic.mb_type[mb_index_j]);
218 if(intra_j==0 || !(error_j&ER_DC_ERROR)){
219 color= dc[b_x + b_y*stride];
220 distance= b_y;
221 }
222 col [b_x + b_y*stride][2]= color;
223 dist[b_x + b_y*stride][2]= distance >= 0 ? distance-b_y : 9999;
224 }
225 }
226
227 for (b_y = 0; b_y < h; b_y++) {
228 for (b_x = 0; b_x < w; b_x++) {
229 int mb_index, error, j;
230 int64_t guess, weight_sum;
231 mb_index = (b_x >> is_luma) + (b_y >> is_luma) * s->mb_stride;
232 error = s->error_status_table[mb_index];
233
234 if (IS_INTER(s->cur_pic.mb_type[mb_index]))
235 continue; // inter
236 if (!(error & ER_DC_ERROR))
237 continue; // dc-ok
238
239 weight_sum = 0;
240 guess = 0;
241 for (j = 0; j < 4; j++) {
242 int64_t weight = 256 * 256 * 256 * 16 / FFMAX(dist[b_x + b_y*stride][j], 1);
243 guess += weight*(int64_t)col[b_x + b_y*stride][j];
244 weight_sum += weight;
245 }
246 guess = (guess + weight_sum / 2) / weight_sum;
247 dc[b_x + b_y * stride] = guess;
248 }
249 }
250
251fail:
252 av_freep(&col);
253 av_freep(&dist);
254}
255
256/**
257 * simple horizontal deblocking filter used for error resilience
258 * @param w width in 8 pixel blocks
259 * @param h height in 8 pixel blocks
260 */
261static void h_block_filter(ERContext *s, uint8_t *dst, int w,
262 int h, ptrdiff_t stride, int is_luma)
263{
264 int b_x, b_y;
265 ptrdiff_t mvx_stride, mvy_stride;
266 const uint8_t *cm = ff_crop_tab + MAX_NEG_CROP;
267 set_mv_strides(s, &mvx_stride, &mvy_stride);
268 mvx_stride >>= is_luma;
269 mvy_stride *= mvx_stride;
270
271 for (b_y = 0; b_y < h; b_y++) {
272 for (b_x = 0; b_x < w - 1; b_x++) {
273 int y;
274 int left_status = s->error_status_table[( b_x >> is_luma) + (b_y >> is_luma) * s->mb_stride];
275 int right_status = s->error_status_table[((b_x + 1) >> is_luma) + (b_y >> is_luma) * s->mb_stride];
276 int left_intra = IS_INTRA(s->cur_pic.mb_type[( b_x >> is_luma) + (b_y >> is_luma) * s->mb_stride]);
277 int right_intra = IS_INTRA(s->cur_pic.mb_type[((b_x + 1) >> is_luma) + (b_y >> is_luma) * s->mb_stride]);
278 int left_damage = left_status & ER_MB_ERROR;
279 int right_damage = right_status & ER_MB_ERROR;
280 int offset = b_x * 8 + b_y * stride * 8;
281 int16_t *left_mv = s->cur_pic.motion_val[0][mvy_stride * b_y + mvx_stride * b_x];
282 int16_t *right_mv = s->cur_pic.motion_val[0][mvy_stride * b_y + mvx_stride * (b_x + 1)];
283 if (!(left_damage || right_damage))
284 continue; // both undamaged
285 if ((!left_intra) && (!right_intra) &&
286 FFABS(left_mv[0] - right_mv[0]) +
287 FFABS(left_mv[1] + right_mv[1]) < 2)
288 continue;
289
290 for (y = 0; y < 8; y++) {
291 int a, b, c, d;
292
293 a = dst[offset + 7 + y * stride] - dst[offset + 6 + y * stride];
294 b = dst[offset + 8 + y * stride] - dst[offset + 7 + y * stride];
295 c = dst[offset + 9 + y * stride] - dst[offset + 8 + y * stride];
296
297 d = FFABS(b) - ((FFABS(a) + FFABS(c) + 1) >> 1);
298 d = FFMAX(d, 0);
299 if (b < 0)
300 d = -d;
301
302 if (d == 0)
303 continue;
304
305 if (!(left_damage && right_damage))
306 d = d * 16 / 9;
307
308 if (left_damage) {
309 dst[offset + 7 + y * stride] = cm[dst[offset + 7 + y * stride] + ((d * 7) >> 4)];
310 dst[offset + 6 + y * stride] = cm[dst[offset + 6 + y * stride] + ((d * 5) >> 4)];
311 dst[offset + 5 + y * stride] = cm[dst[offset + 5 + y * stride] + ((d * 3) >> 4)];
312 dst[offset + 4 + y * stride] = cm[dst[offset + 4 + y * stride] + ((d * 1) >> 4)];
313 }
314 if (right_damage) {
315 dst[offset + 8 + y * stride] = cm[dst[offset + 8 + y * stride] - ((d * 7) >> 4)];
316 dst[offset + 9 + y * stride] = cm[dst[offset + 9 + y * stride] - ((d * 5) >> 4)];
317 dst[offset + 10+ y * stride] = cm[dst[offset + 10 + y * stride] - ((d * 3) >> 4)];
318 dst[offset + 11+ y * stride] = cm[dst[offset + 11 + y * stride] - ((d * 1) >> 4)];
319 }
320 }
321 }
322 }
323}
324
325/**
326 * simple vertical deblocking filter used for error resilience
327 * @param w width in 8 pixel blocks
328 * @param h height in 8 pixel blocks
329 */
330static void v_block_filter(ERContext *s, uint8_t *dst, int w, int h,
331 ptrdiff_t stride, int is_luma)
332{
333 int b_x, b_y;
334 ptrdiff_t mvx_stride, mvy_stride;
335 const uint8_t *cm = ff_crop_tab + MAX_NEG_CROP;
336 set_mv_strides(s, &mvx_stride, &mvy_stride);
337 mvx_stride >>= is_luma;
338 mvy_stride *= mvx_stride;
339
340 for (b_y = 0; b_y < h - 1; b_y++) {
341 for (b_x = 0; b_x < w; b_x++) {
342 int x;
343 int top_status = s->error_status_table[(b_x >> is_luma) + (b_y >> is_luma) * s->mb_stride];
344 int bottom_status = s->error_status_table[(b_x >> is_luma) + ((b_y + 1) >> is_luma) * s->mb_stride];
345 int top_intra = IS_INTRA(s->cur_pic.mb_type[(b_x >> is_luma) + ( b_y >> is_luma) * s->mb_stride]);
346 int bottom_intra = IS_INTRA(s->cur_pic.mb_type[(b_x >> is_luma) + ((b_y + 1) >> is_luma) * s->mb_stride]);
347 int top_damage = top_status & ER_MB_ERROR;
348 int bottom_damage = bottom_status & ER_MB_ERROR;
349 int offset = b_x * 8 + b_y * stride * 8;
350
351 int16_t *top_mv = s->cur_pic.motion_val[0][mvy_stride * b_y + mvx_stride * b_x];
352 int16_t *bottom_mv = s->cur_pic.motion_val[0][mvy_stride * (b_y + 1) + mvx_stride * b_x];
353
354 if (!(top_damage || bottom_damage))
355 continue; // both undamaged
356
357 if ((!top_intra) && (!bottom_intra) &&
358 FFABS(top_mv[0] - bottom_mv[0]) +
359 FFABS(top_mv[1] + bottom_mv[1]) < 2)
360 continue;
361
362 for (x = 0; x < 8; x++) {
363 int a, b, c, d;
364
365 a = dst[offset + x + 7 * stride] - dst[offset + x + 6 * stride];
366 b = dst[offset + x + 8 * stride] - dst[offset + x + 7 * stride];
367 c = dst[offset + x + 9 * stride] - dst[offset + x + 8 * stride];
368
369 d = FFABS(b) - ((FFABS(a) + FFABS(c) + 1) >> 1);
370 d = FFMAX(d, 0);
371 if (b < 0)
372 d = -d;
373
374 if (d == 0)
375 continue;
376
377 if (!(top_damage && bottom_damage))
378 d = d * 16 / 9;
379
380 if (top_damage) {
381 dst[offset + x + 7 * stride] = cm[dst[offset + x + 7 * stride] + ((d * 7) >> 4)];
382 dst[offset + x + 6 * stride] = cm[dst[offset + x + 6 * stride] + ((d * 5) >> 4)];
383 dst[offset + x + 5 * stride] = cm[dst[offset + x + 5 * stride] + ((d * 3) >> 4)];
384 dst[offset + x + 4 * stride] = cm[dst[offset + x + 4 * stride] + ((d * 1) >> 4)];
385 }
386 if (bottom_damage) {
387 dst[offset + x + 8 * stride] = cm[dst[offset + x + 8 * stride] - ((d * 7) >> 4)];
388 dst[offset + x + 9 * stride] = cm[dst[offset + x + 9 * stride] - ((d * 5) >> 4)];
389 dst[offset + x + 10 * stride] = cm[dst[offset + x + 10 * stride] - ((d * 3) >> 4)];
390 dst[offset + x + 11 * stride] = cm[dst[offset + x + 11 * stride] - ((d * 1) >> 4)];
391 }
392 }
393 }
394 }
395}
396
397#define MV_FROZEN 8
398#define MV_CHANGED 4
399#define MV_UNCHANGED 2
400#define MV_LISTED 1
401static av_always_inline void add_blocklist(int (*blocklist)[2], int *blocklist_length, uint8_t *fixed, int mb_x, int mb_y, int mb_xy)
402{
403 if (fixed[mb_xy])
404 return;
405 fixed[mb_xy] = MV_LISTED;
406 blocklist[ *blocklist_length ][0] = mb_x;
407 blocklist[(*blocklist_length)++][1] = mb_y;
408}
409
410static void guess_mv(ERContext *s)
411{
412 int (*blocklist)[2], (*next_blocklist)[2];
413 uint8_t *fixed;
414 const ptrdiff_t mb_stride = s->mb_stride;
415 const int mb_width = s->mb_width;
416 int mb_height = s->mb_height;
417 int i, num_avail;
418 int mb_x, mb_y;
419 ptrdiff_t mot_step, mot_stride;
420 int blocklist_length, next_blocklist_length;
421
422 if (s->last_pic.f && s->last_pic.f->data[0])
423 mb_height = FFMIN(mb_height, (s->last_pic.f->height+15)>>4);
424 if (s->next_pic.f && s->next_pic.f->data[0])
425 mb_height = FFMIN(mb_height, (s->next_pic.f->height+15)>>4);
426
427 blocklist = (int (*)[2])s->er_temp_buffer;
428 next_blocklist = blocklist + s->mb_stride * s->mb_height;
429 fixed = (uint8_t *)(next_blocklist + s->mb_stride * s->mb_height);
430
431 set_mv_strides(s, &mot_step, &mot_stride);
432
433 num_avail = 0;
434 if (s->last_pic.motion_val[0]) {
435 if (s->last_pic.tf)
436 ff_thread_await_progress(s->last_pic.tf, mb_height-1, 0);
437 else
438 ff_thread_progress_await(s->last_pic.progress, mb_height - 1);
439 }
440 for (i = 0; i < mb_width * mb_height; i++) {
441 const int mb_xy = s->mb_index2xy[i];
442 int f = 0;
443 int error = s->error_status_table[mb_xy];
444
445 if (IS_INTRA(s->cur_pic.mb_type[mb_xy]))
446 f = MV_FROZEN; // intra // FIXME check
447 if (!(error & ER_MV_ERROR))
448 f = MV_FROZEN; // inter with undamaged MV
449
450 fixed[mb_xy] = f;
451 if (f == MV_FROZEN)
452 num_avail++;
453 else if(s->last_pic.f->data[0] && s->last_pic.motion_val[0]){
454 const int mb_y= mb_xy / s->mb_stride;
455 const int mb_x= mb_xy % s->mb_stride;
456 const int mot_index= (mb_x + mb_y*mot_stride) * mot_step;
457 s->cur_pic.motion_val[0][mot_index][0]= s->last_pic.motion_val[0][mot_index][0];
458 s->cur_pic.motion_val[0][mot_index][1]= s->last_pic.motion_val[0][mot_index][1];
459 s->cur_pic.ref_index[0][4*mb_xy] = s->last_pic.ref_index[0][4*mb_xy];
460 }
461 }
462
463 if ((!(s->avctx->error_concealment&FF_EC_GUESS_MVS)) ||
464 num_avail <= FFMAX(mb_width, mb_height) / 2) {
465 for (mb_y = 0; mb_y < mb_height; mb_y++) {
466 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
467 const int mb_xy = mb_x + mb_y * s->mb_stride;
468 int mv_dir = (s->last_pic.f && s->last_pic.f->data[0]) ? MV_DIR_FORWARD : MV_DIR_BACKWARD;
469
470 if (IS_INTRA(s->cur_pic.mb_type[mb_xy]))
471 continue;
472 if (!(s->error_status_table[mb_xy] & ER_MV_ERROR))
473 continue;
474
475 s->mv[0][0][0] = 0;
476 s->mv[0][0][1] = 0;
477 s->decode_mb(s->opaque, 0, mv_dir, MV_TYPE_16X16, &s->mv,
478 mb_x, mb_y, 0, 0);
479 }
480 }
481 return;
482 }
483
484 blocklist_length = 0;
485 for (mb_y = 0; mb_y < mb_height; mb_y++) {
486 for (mb_x = 0; mb_x < mb_width; mb_x++) {
487 const int mb_xy = mb_x + mb_y * mb_stride;
488 if (fixed[mb_xy] == MV_FROZEN) {
489 if (mb_x) add_blocklist(blocklist, &blocklist_length, fixed, mb_x - 1, mb_y, mb_xy - 1);
490 if (mb_y) add_blocklist(blocklist, &blocklist_length, fixed, mb_x, mb_y - 1, mb_xy - mb_stride);
491 if (mb_x+1 < mb_width) add_blocklist(blocklist, &blocklist_length, fixed, mb_x + 1, mb_y, mb_xy + 1);
492 if (mb_y+1 < mb_height) add_blocklist(blocklist, &blocklist_length, fixed, mb_x, mb_y + 1, mb_xy + mb_stride);
493 }
494 }
495 }
496
497 for (;;) {
498 int changed, pass, none_left;
499 int blocklist_index;
500
501 none_left = 1;
502 changed = 1;
503 for (pass = 0; (changed || pass < 2) && pass < 10; pass++) {
504 changed = 0;
505 for (blocklist_index = 0; blocklist_index < blocklist_length; blocklist_index++) {
506 const int mb_x = blocklist[blocklist_index][0];
507 const int mb_y = blocklist[blocklist_index][1];
508 const int mb_xy = mb_x + mb_y * mb_stride;
509 int mv_predictor[8][2];
510 int ref[8];
511 int pred_count;
512 int j;
513 int best_score;
514 int best_pred;
515 int mot_index;
516 int prev_x, prev_y, prev_ref;
517
518 if ((mb_x ^ mb_y ^ pass) & 1)
519 continue;
520 av_assert2(fixed[mb_xy] != MV_FROZEN);
521
522
523 av_assert1(!IS_INTRA(s->cur_pic.mb_type[mb_xy]));
524 av_assert1(s->last_pic.f && s->last_pic.f->data[0]);
525
526 j = 0;
527 if (mb_x > 0)
528 j |= fixed[mb_xy - 1];
529 if (mb_x + 1 < mb_width)
530 j |= fixed[mb_xy + 1];
531 if (mb_y > 0)
532 j |= fixed[mb_xy - mb_stride];
533 if (mb_y + 1 < mb_height)
534 j |= fixed[mb_xy + mb_stride];
535
536 av_assert2(j & MV_FROZEN);
537
538 if (!(j & MV_CHANGED) && pass > 1)
539 continue;
540
541 none_left = 0;
542 pred_count = 0;
543 mot_index = (mb_x + mb_y * mot_stride) * mot_step;
544
545 if (mb_x > 0 && fixed[mb_xy - 1] > 1) {
546 mv_predictor[pred_count][0] =
547 s->cur_pic.motion_val[0][mot_index - mot_step][0];
548 mv_predictor[pred_count][1] =
549 s->cur_pic.motion_val[0][mot_index - mot_step][1];
550 ref[pred_count] =
551 s->cur_pic.ref_index[0][4 * (mb_xy - 1)];
552 pred_count++;
553 }
554 if (mb_x + 1 < mb_width && fixed[mb_xy + 1] > 1) {
555 mv_predictor[pred_count][0] =
556 s->cur_pic.motion_val[0][mot_index + mot_step][0];
557 mv_predictor[pred_count][1] =
558 s->cur_pic.motion_val[0][mot_index + mot_step][1];
559 ref[pred_count] =
560 s->cur_pic.ref_index[0][4 * (mb_xy + 1)];
561 pred_count++;
562 }
563 if (mb_y > 0 && fixed[mb_xy - mb_stride] > 1) {
564 mv_predictor[pred_count][0] =
565 s->cur_pic.motion_val[0][mot_index - mot_stride * mot_step][0];
566 mv_predictor[pred_count][1] =
567 s->cur_pic.motion_val[0][mot_index - mot_stride * mot_step][1];
568 ref[pred_count] =
569 s->cur_pic.ref_index[0][4 * (mb_xy - s->mb_stride)];
570 pred_count++;
571 }
572 if (mb_y + 1<mb_height && fixed[mb_xy + mb_stride] > 1) {
573 mv_predictor[pred_count][0] =
574 s->cur_pic.motion_val[0][mot_index + mot_stride * mot_step][0];
575 mv_predictor[pred_count][1] =
576 s->cur_pic.motion_val[0][mot_index + mot_stride * mot_step][1];
577 ref[pred_count] =
578 s->cur_pic.ref_index[0][4 * (mb_xy + s->mb_stride)];
579 pred_count++;
580 }
581 if (pred_count == 0)
582 continue;
583
584 if (pred_count > 1) {
585 int sum_x = 0, sum_y = 0, sum_r = 0;
586 int max_x, max_y, min_x, min_y, max_r, min_r;
587
588 for (j = 0; j < pred_count; j++) {
589 sum_x += mv_predictor[j][0];
590 sum_y += mv_predictor[j][1];
591 sum_r += ref[j];
592 if (j && ref[j] != ref[j - 1])
593 goto skip_mean_and_median;
594 }
595
596 /* mean */
597 mv_predictor[pred_count][0] = sum_x / j;
598 mv_predictor[pred_count][1] = sum_y / j;
599 ref[pred_count] = sum_r / j;
600
601 /* median */
602 if (pred_count >= 3) {
603 min_y = min_x = min_r = 99999;
604 max_y = max_x = max_r = -99999;
605 } else {
606 min_x = min_y = max_x = max_y = min_r = max_r = 0;
607 }
608 for (j = 0; j < pred_count; j++) {
609 max_x = FFMAX(max_x, mv_predictor[j][0]);
610 max_y = FFMAX(max_y, mv_predictor[j][1]);
611 max_r = FFMAX(max_r, ref[j]);
612 min_x = FFMIN(min_x, mv_predictor[j][0]);
613 min_y = FFMIN(min_y, mv_predictor[j][1]);
614 min_r = FFMIN(min_r, ref[j]);
615 }
616 mv_predictor[pred_count + 1][0] = sum_x - max_x - min_x;
617 mv_predictor[pred_count + 1][1] = sum_y - max_y - min_y;
618 ref[pred_count + 1] = sum_r - max_r - min_r;
619
620 if (pred_count == 4) {
621 mv_predictor[pred_count + 1][0] /= 2;
622 mv_predictor[pred_count + 1][1] /= 2;
623 ref[pred_count + 1] /= 2;
624 }
625 pred_count += 2;
626 }
627
628skip_mean_and_median:
629 /* zero MV */
630 mv_predictor[pred_count][0] =
631 mv_predictor[pred_count][1] =
632 ref[pred_count] = 0;
633 pred_count++;
634
635 prev_x = s->cur_pic.motion_val[0][mot_index][0];
636 prev_y = s->cur_pic.motion_val[0][mot_index][1];
637 prev_ref = s->cur_pic.ref_index[0][4 * mb_xy];
638
639 /* last MV */
640 mv_predictor[pred_count][0] = prev_x;
641 mv_predictor[pred_count][1] = prev_y;
642 ref[pred_count] = prev_ref;
643 pred_count++;
644
645 best_pred = 0;
646 best_score = 256 * 256 * 256 * 64;
647 for (j = 0; j < pred_count; j++) {
648 int *linesize = s->cur_pic.f->linesize;
649 int score = 0;
650 uint8_t *src = s->cur_pic.f->data[0] +
651 mb_x * 16 + mb_y * 16 * linesize[0];
652
653 s->cur_pic.motion_val[0][mot_index][0] =
654 s->mv[0][0][0] = mv_predictor[j][0];
655 s->cur_pic.motion_val[0][mot_index][1] =
656 s->mv[0][0][1] = mv_predictor[j][1];
657
658 // predictor intra or otherwise not available
659 if (ref[j] < 0)
660 continue;
661
662 s->decode_mb(s->opaque, ref[j], MV_DIR_FORWARD,
663 MV_TYPE_16X16, &s->mv, mb_x, mb_y, 0, 0);
664
665 if (mb_x > 0 && fixed[mb_xy - 1] > 1) {
666 int k;
667 for (k = 0; k < 16; k++)
668 score += FFABS(src[k * linesize[0] - 1] -
669 src[k * linesize[0]]);
670 }
671 if (mb_x + 1 < mb_width && fixed[mb_xy + 1] > 1) {
672 int k;
673 for (k = 0; k < 16; k++)
674 score += FFABS(src[k * linesize[0] + 15] -
675 src[k * linesize[0] + 16]);
676 }
677 if (mb_y > 0 && fixed[mb_xy - mb_stride] > 1) {
678 int k;
679 for (k = 0; k < 16; k++)
680 score += FFABS(src[k - linesize[0]] - src[k]);
681 }
682 if (mb_y + 1 < mb_height && fixed[mb_xy + mb_stride] > 1) {
683 int k;
684 for (k = 0; k < 16; k++)
685 score += FFABS(src[k + linesize[0] * 15] -
686 src[k + linesize[0] * 16]);
687 }
688
689 if (score <= best_score) { // <= will favor the last MV
690 best_score = score;
691 best_pred = j;
692 }
693 }
694 s->mv[0][0][0] = mv_predictor[best_pred][0];
695 s->mv[0][0][1] = mv_predictor[best_pred][1];
696
697 for (i = 0; i < mot_step; i++)
698 for (j = 0; j < mot_step; j++) {
699 s->cur_pic.motion_val[0][mot_index + i + j * mot_stride][0] = s->mv[0][0][0];
700 s->cur_pic.motion_val[0][mot_index + i + j * mot_stride][1] = s->mv[0][0][1];
701 }
702
703 s->decode_mb(s->opaque, ref[best_pred], MV_DIR_FORWARD,
704 MV_TYPE_16X16, &s->mv, mb_x, mb_y, 0, 0);
705
706
707 if (s->mv[0][0][0] != prev_x || s->mv[0][0][1] != prev_y) {
708 fixed[mb_xy] = MV_CHANGED;
709 changed++;
710 } else
711 fixed[mb_xy] = MV_UNCHANGED;
712 }
713 }
714
715 if (none_left)
716 return;
717
718 next_blocklist_length = 0;
719
720 for (blocklist_index = 0; blocklist_index < blocklist_length; blocklist_index++) {
721 const int mb_x = blocklist[blocklist_index][0];
722 const int mb_y = blocklist[blocklist_index][1];
723 const int mb_xy = mb_x + mb_y * mb_stride;
724
725 if (fixed[mb_xy] & (MV_CHANGED|MV_UNCHANGED|MV_FROZEN)) {
726 fixed[mb_xy] = MV_FROZEN;
727 if (mb_x > 0)
728 add_blocklist(next_blocklist, &next_blocklist_length, fixed, mb_x - 1, mb_y, mb_xy - 1);
729 if (mb_y > 0)
730 add_blocklist(next_blocklist, &next_blocklist_length, fixed, mb_x, mb_y - 1, mb_xy - mb_stride);
731 if (mb_x + 1 < mb_width)
732 add_blocklist(next_blocklist, &next_blocklist_length, fixed, mb_x + 1, mb_y, mb_xy + 1);
733 if (mb_y + 1 < mb_height)
734 add_blocklist(next_blocklist, &next_blocklist_length, fixed, mb_x, mb_y + 1, mb_xy + mb_stride);
735 }
736 }
737 av_assert0(next_blocklist_length <= mb_height * mb_width);
738 FFSWAP(int , blocklist_length, next_blocklist_length);
739 FFSWAP(void*, blocklist, next_blocklist);
740 }
741}
742
743static int is_intra_more_likely(ERContext *s)
744{
745 int is_intra_likely, i, j, undamaged_count, skip_amount, mb_x, mb_y;
746
747 if (!s->last_pic.f || !s->last_pic.f->data[0])
748 return 1; // no previous frame available -> use spatial prediction
749
750 if (s->avctx->error_concealment & FF_EC_FAVOR_INTER)
751 return 0;
752
753 undamaged_count = 0;
754 for (i = 0; i < s->mb_num; i++) {
755 const int mb_xy = s->mb_index2xy[i];
756 const int error = s->error_status_table[mb_xy];
757 if (!((error & ER_DC_ERROR) && (error & ER_MV_ERROR)))
758 undamaged_count++;
759 }
760
761 if (undamaged_count < 5)
762 return 0; // almost all MBs damaged -> use temporal prediction
763
764 skip_amount = FFMAX(undamaged_count / 50, 1); // check only up to 50 MBs
765 is_intra_likely = 0;
766
767 j = 0;
768 for (mb_y = 0; mb_y < s->mb_height - 1; mb_y++) {
769 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
770 int error;
771 const int mb_xy = mb_x + mb_y * s->mb_stride;
772
773 error = s->error_status_table[mb_xy];
774 if ((error & ER_DC_ERROR) && (error & ER_MV_ERROR))
775 continue; // skip damaged
776
777 j++;
778 // skip a few to speed things up
779 if ((j % skip_amount) != 0)
780 continue;
781
782 if (s->cur_pic.f->pict_type == AV_PICTURE_TYPE_I) {
783 int *linesize = s->cur_pic.f->linesize;
784 uint8_t *mb_ptr = s->cur_pic.f->data[0] +
785 mb_x * 16 + mb_y * 16 * linesize[0];
786 uint8_t *last_mb_ptr = s->last_pic.f->data[0] +
787 mb_x * 16 + mb_y * 16 * linesize[0];
788
789 if (s->avctx->codec_id == AV_CODEC_ID_H264) {
790 // FIXME
791 } else {
792 ff_thread_progress_await(s->last_pic.progress, mb_y);
793 }
794 is_intra_likely += s->sad(NULL, last_mb_ptr, mb_ptr,
795 linesize[0], 16);
796 // FIXME need await_progress() here
797 is_intra_likely -= s->sad(NULL, last_mb_ptr,
798 last_mb_ptr + linesize[0] * 16,
799 linesize[0], 16);
800 } else {
801 if (IS_INTRA(s->cur_pic.mb_type[mb_xy]))
802 is_intra_likely++;
803 else
804 is_intra_likely--;
805 }
806 }
807 }
808// av_log(NULL, AV_LOG_ERROR, "is_intra_likely: %d type:%d\n", is_intra_likely, s->pict_type);
809 return is_intra_likely > 0;
810}
811
812void ff_er_frame_start(ERContext *s)
813{
814 if (!s->avctx->error_concealment)
815 return;
816
817 memset(s->error_status_table, ER_MB_ERROR | VP_START | ER_MB_END,
818 s->mb_stride * s->mb_height * sizeof(uint8_t));
819 atomic_init(&s->error_count, 3 * s->mb_num);
820 s->error_occurred = 0;
821}
822
823static int er_supported(ERContext *s)
824{
825 if (s->avctx->hwaccel ||
826 !s->cur_pic.f ||
827 s->cur_pic.field_picture
828 )
829 return 0;
830 return 1;
831}
832
833/**
834 * Add a slice.
835 * @param endx x component of the last macroblock, can be -1
836 * for the last of the previous line
837 * @param status the status at the end (ER_MV_END, ER_AC_ERROR, ...), it is
838 * assumed that no earlier end or error of the same type occurred
839 */
840void ff_er_add_slice(ERContext *s, int startx, int starty,
841 int endx, int endy, int status)
842{
843 const int start_i = av_clip(startx + starty * s->mb_width, 0, s->mb_num - 1);
844 const int end_i = av_clip(endx + endy * s->mb_width, 0, s->mb_num);
845 const int start_xy = s->mb_index2xy[start_i];
846 const int end_xy = s->mb_index2xy[end_i];
847 int mask = -1;
848
849 if (s->avctx->hwaccel)
850 return;
851
852 if (start_i > end_i || start_xy > end_xy) {
853 av_log(s->avctx, AV_LOG_ERROR,
854 "internal error, slice end before start\n");
855 return;
856 }
857
858 if (!s->avctx->error_concealment)
859 return;
860
861 mask &= ~VP_START;
862 if (status & (ER_AC_ERROR | ER_AC_END)) {
863 mask &= ~(ER_AC_ERROR | ER_AC_END);
864 atomic_fetch_add(&s->error_count, start_i - end_i - 1);
865 }
866 if (status & (ER_DC_ERROR | ER_DC_END)) {
867 mask &= ~(ER_DC_ERROR | ER_DC_END);
868 atomic_fetch_add(&s->error_count, start_i - end_i - 1);
869 }
870 if (status & (ER_MV_ERROR | ER_MV_END)) {
871 mask &= ~(ER_MV_ERROR | ER_MV_END);
872 atomic_fetch_add(&s->error_count, start_i - end_i - 1);
873 }
874
875 if (status & ER_MB_ERROR) {
876 s->error_occurred = 1;
877 atomic_store(&s->error_count, INT_MAX);
878 }
879
880 if (mask == ~0x7F) {
881 memset(&s->error_status_table[start_xy], 0,
882 (end_xy - start_xy) * sizeof(uint8_t));
883 } else {
884 int i;
885 for (i = start_xy; i < end_xy; i++)
886 s->error_status_table[i] &= mask;
887 }
888
889 if (end_i == s->mb_num)
890 atomic_store(&s->error_count, INT_MAX);
891 else {
892 s->error_status_table[end_xy] &= mask;
893 s->error_status_table[end_xy] |= status;
894 }
895
896 s->error_status_table[start_xy] |= VP_START;
897
898 if (start_xy > 0 && !(s->avctx->active_thread_type & FF_THREAD_SLICE) &&
899 er_supported(s) && s->avctx->skip_top * s->mb_width < start_i) {
900 int prev_status = s->error_status_table[s->mb_index2xy[start_i - 1]];
901
902 prev_status &= ~ VP_START;
903 if (prev_status != (ER_MV_END | ER_DC_END | ER_AC_END)) {
904 s->error_occurred = 1;
905 atomic_store(&s->error_count, INT_MAX);
906 }
907 }
908}
909
910void ff_er_frame_end(ERContext *s, int *decode_error_flags)
911{
912 int *linesize = NULL;
913 int i, mb_x, mb_y, error, error_type, dc_error, mv_error, ac_error;
914 int distance;
915 int threshold_part[4] = { 100, 100, 100 };
916 int threshold = 50;
917 int is_intra_likely;
918 int size = s->b8_stride * 2 * s->mb_height;
919 int guessed_mb_type;
920
921 /* We do not support ER of field pictures yet,
922 * though it should not crash if enabled. */
923 if (!s->avctx->error_concealment || !atomic_load(&s->error_count) ||
924 s->avctx->lowres ||
925 !er_supported(s) ||
926 atomic_load(&s->error_count) == 3 * s->mb_width *
927 (s->avctx->skip_top + s->avctx->skip_bottom)) {
928 return;
929 }
930 linesize = s->cur_pic.f->linesize;
931
932 if ( s->avctx->codec_id == AV_CODEC_ID_MPEG2VIDEO
933 && (FFALIGN(s->avctx->height, 16)&16)
934 && atomic_load(&s->error_count) == 3 * s->mb_width * (s->avctx->skip_top + s->avctx->skip_bottom + 1)) {
935 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
936 int status = s->error_status_table[mb_x + (s->mb_height - 1) * s->mb_stride];
937 if (status != 0x7F)
938 break;
939 }
940
941 if (mb_x == s->mb_width) {
942 av_log(s->avctx, AV_LOG_DEBUG, "ignoring last missing slice\n");
943 return;
944 }
945 }
946
947 if (s->last_pic.f) {
948 if (s->last_pic.f->width != s->cur_pic.f->width ||
949 s->last_pic.f->height != s->cur_pic.f->height ||
950 s->last_pic.f->format != s->cur_pic.f->format) {
951 av_log(s->avctx, AV_LOG_WARNING, "Cannot use previous picture in error concealment\n");
952 memset(&s->last_pic, 0, sizeof(s->last_pic));
953 }
954 }
955 if (s->next_pic.f) {
956 if (s->next_pic.f->width != s->cur_pic.f->width ||
957 s->next_pic.f->height != s->cur_pic.f->height ||
958 s->next_pic.f->format != s->cur_pic.f->format) {
959 av_log(s->avctx, AV_LOG_WARNING, "Cannot use next picture in error concealment\n");
960 memset(&s->next_pic, 0, sizeof(s->next_pic));
961 }
962 }
963
964 if (!s->cur_pic.motion_val[0] || !s->cur_pic.ref_index[0]) {
965 av_log(s->avctx, AV_LOG_ERROR, "Warning MVs not available\n");
966
967 for (i = 0; i < 2; i++) {
968 s->ref_index[i] = av_calloc(s->mb_stride * s->mb_height, 4 * sizeof(uint8_t));
969 s->motion_val_base[i] = av_calloc(size + 4, 2 * sizeof(uint16_t));
970 if (!s->ref_index[i] || !s->motion_val_base[i])
971 goto cleanup;
972 s->cur_pic.ref_index[i] = s->ref_index[i];
973 s->cur_pic.motion_val[i] = s->motion_val_base[i] + 4;
974 }
975 }
976
977 if (s->avctx->debug & FF_DEBUG_ER) {
978 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
979 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
980 int status = s->error_status_table[mb_x + mb_y * s->mb_stride];
981
982 av_log(s->avctx, AV_LOG_DEBUG, "%2X ", status);
983 }
984 av_log(s->avctx, AV_LOG_DEBUG, "\n");
985 }
986 }
987
988#if 1
989 /* handle overlapping slices */
990 for (error_type = 1; error_type <= 3; error_type++) {
991 int end_ok = 0;
992
993 for (i = s->mb_num - 1; i >= 0; i--) {
994 const int mb_xy = s->mb_index2xy[i];
995 int error = s->error_status_table[mb_xy];
996
997 if (error & (1 << error_type))
998 end_ok = 1;
999 if (error & (8 << error_type))
1000 end_ok = 1;
1001
1002 if (!end_ok)
1003 s->error_status_table[mb_xy] |= 1 << error_type;
1004
1005 if (error & VP_START)
1006 end_ok = 0;
1007 }
1008 }
1009#endif
1010#if 1
1011 /* handle slices with partitions of different length */
1012 if (s->partitioned_frame) {
1013 int end_ok = 0;
1014
1015 for (i = s->mb_num - 1; i >= 0; i--) {
1016 const int mb_xy = s->mb_index2xy[i];
1017 int error = s->error_status_table[mb_xy];
1018
1019 if (error & ER_AC_END)
1020 end_ok = 0;
1021 if ((error & ER_MV_END) ||
1022 (error & ER_DC_END) ||
1023 (error & ER_AC_ERROR))
1024 end_ok = 1;
1025
1026 if (!end_ok)
1027 s->error_status_table[mb_xy]|= ER_AC_ERROR;
1028
1029 if (error & VP_START)
1030 end_ok = 0;
1031 }
1032 }
1033#endif
1034 /* handle missing slices */
1035 if (s->avctx->err_recognition & AV_EF_EXPLODE) {
1036 int end_ok = 1;
1037
1038 // FIXME + 100 hack
1039 for (i = s->mb_num - 2; i >= s->mb_width + 100; i--) {
1040 const int mb_xy = s->mb_index2xy[i];
1041 int error1 = s->error_status_table[mb_xy];
1042 int error2 = s->error_status_table[s->mb_index2xy[i + 1]];
1043
1044 if (error1 & VP_START)
1045 end_ok = 1;
1046
1047 if (error2 == (VP_START | ER_MB_ERROR | ER_MB_END) &&
1048 error1 != (VP_START | ER_MB_ERROR | ER_MB_END) &&
1049 ((error1 & ER_AC_END) || (error1 & ER_DC_END) ||
1050 (error1 & ER_MV_END))) {
1051 // end & uninit
1052 end_ok = 0;
1053 }
1054
1055 if (!end_ok)
1056 s->error_status_table[mb_xy] |= ER_MB_ERROR;
1057 }
1058 }
1059
1060#if 1
1061 /* backward mark errors */
1062 distance = 9999999;
1063 for (error_type = 1; error_type <= 3; error_type++) {
1064 for (i = s->mb_num - 1; i >= 0; i--) {
1065 const int mb_xy = s->mb_index2xy[i];
1066 int error = s->error_status_table[mb_xy];
1067
1068 if (!s->mbskip_table || !s->mbskip_table[mb_xy]) // FIXME partition specific
1069 distance++;
1070 if (error & (1 << error_type))
1071 distance = 0;
1072
1073 if (s->partitioned_frame) {
1074 if (distance < threshold_part[error_type - 1])
1075 s->error_status_table[mb_xy] |= 1 << error_type;
1076 } else {
1077 if (distance < threshold)
1078 s->error_status_table[mb_xy] |= 1 << error_type;
1079 }
1080
1081 if (error & VP_START)
1082 distance = 9999999;
1083 }
1084 }
1085#endif
1086
1087 /* forward mark errors */
1088 error = 0;
1089 for (i = 0; i < s->mb_num; i++) {
1090 const int mb_xy = s->mb_index2xy[i];
1091 int old_error = s->error_status_table[mb_xy];
1092
1093 if (old_error & VP_START) {
1094 error = old_error & ER_MB_ERROR;
1095 } else {
1096 error |= old_error & ER_MB_ERROR;
1097 s->error_status_table[mb_xy] |= error;
1098 }
1099 }
1100#if 1
1101 /* handle not partitioned case */
1102 if (!s->partitioned_frame) {
1103 for (i = 0; i < s->mb_num; i++) {
1104 const int mb_xy = s->mb_index2xy[i];
1105 int error = s->error_status_table[mb_xy];
1106 if (error & ER_MB_ERROR)
1107 error |= ER_MB_ERROR;
1108 s->error_status_table[mb_xy] = error;
1109 }
1110 }
1111#endif
1112
1113 dc_error = ac_error = mv_error = 0;
1114 for (i = 0; i < s->mb_num; i++) {
1115 const int mb_xy = s->mb_index2xy[i];
1116 int error = s->error_status_table[mb_xy];
1117 if (error & ER_DC_ERROR)
1118 dc_error++;
1119 if (error & ER_AC_ERROR)
1120 ac_error++;
1121 if (error & ER_MV_ERROR)
1122 mv_error++;
1123 }
1124 av_log(s->avctx, AV_LOG_INFO, "concealing %d DC, %d AC, %d MV errors in %c frame\n",
1125 dc_error, ac_error, mv_error, av_get_picture_type_char(s->cur_pic.f->pict_type));
1126
1127 if (decode_error_flags)
1128 *decode_error_flags |= FF_DECODE_ERROR_CONCEALMENT_ACTIVE;
1129 else
1130 s->cur_pic.f->decode_error_flags |= FF_DECODE_ERROR_CONCEALMENT_ACTIVE;
1131
1132 is_intra_likely = is_intra_more_likely(s);
1133
1134 /* set unknown mb-type to most likely */
1135 guessed_mb_type = is_intra_likely ? MB_TYPE_INTRA4x4 :
1136 (MB_TYPE_16x16 | (s->avctx->codec_id == AV_CODEC_ID_H264 ? MB_TYPE_L0 : MB_TYPE_FORWARD_MV));
1137 for (i = 0; i < s->mb_num; i++) {
1138 const int mb_xy = s->mb_index2xy[i];
1139 int error = s->error_status_table[mb_xy];
1140 if (!((error & ER_DC_ERROR) && (error & ER_MV_ERROR)))
1141 continue;
1142
1143 s->cur_pic.mb_type[mb_xy] = guessed_mb_type;
1144 }
1145
1146 // change inter to intra blocks if no reference frames are available
1147 if (!(s->last_pic.f && s->last_pic.f->data[0]) &&
1148 !(s->next_pic.f && s->next_pic.f->data[0]))
1149 for (i = 0; i < s->mb_num; i++) {
1150 const int mb_xy = s->mb_index2xy[i];
1151 if (!IS_INTRA(s->cur_pic.mb_type[mb_xy]))
1152 s->cur_pic.mb_type[mb_xy] = MB_TYPE_INTRA4x4;
1153 }
1154
1155 /* handle inter blocks with damaged AC */
1156 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1157 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1158 const int mb_xy = mb_x + mb_y * s->mb_stride;
1159 const int mb_type = s->cur_pic.mb_type[mb_xy];
1160 const int dir = !(s->last_pic.f && s->last_pic.f->data[0]);
1161 const int mv_dir = dir ? MV_DIR_BACKWARD : MV_DIR_FORWARD;
1162 int mv_type;
1163
1164 int error = s->error_status_table[mb_xy];
1165
1166 if (IS_INTRA(mb_type))
1167 continue; // intra
1168 if (error & ER_MV_ERROR)
1169 continue; // inter with damaged MV
1170 if (!(error & ER_AC_ERROR))
1171 continue; // undamaged inter
1172
1173 if (IS_8X8(mb_type)) {
1174 int mb_index = mb_x * 2 + mb_y * 2 * s->b8_stride;
1175 int j;
1176 mv_type = MV_TYPE_8X8;
1177 for (j = 0; j < 4; j++) {
1178 s->mv[0][j][0] = s->cur_pic.motion_val[dir][mb_index + (j & 1) + (j >> 1) * s->b8_stride][0];
1179 s->mv[0][j][1] = s->cur_pic.motion_val[dir][mb_index + (j & 1) + (j >> 1) * s->b8_stride][1];
1180 }
1181 } else {
1182 mv_type = MV_TYPE_16X16;
1183 s->mv[0][0][0] = s->cur_pic.motion_val[dir][mb_x * 2 + mb_y * 2 * s->b8_stride][0];
1184 s->mv[0][0][1] = s->cur_pic.motion_val[dir][mb_x * 2 + mb_y * 2 * s->b8_stride][1];
1185 }
1186
1187 s->decode_mb(s->opaque, 0 /* FIXME H.264 partitioned slices need this set */,
1188 mv_dir, mv_type, &s->mv, mb_x, mb_y, 0, 0);
1189 }
1190 }
1191
1192 /* guess MVs */
1193 if (s->cur_pic.f->pict_type == AV_PICTURE_TYPE_B) {
1194 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1195 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1196 int xy = mb_x * 2 + mb_y * 2 * s->b8_stride;
1197 const int mb_xy = mb_x + mb_y * s->mb_stride;
1198 const int mb_type = s->cur_pic.mb_type[mb_xy];
1199 int mv_dir = MV_DIR_FORWARD | MV_DIR_BACKWARD;
1200
1201 int error = s->error_status_table[mb_xy];
1202
1203 if (IS_INTRA(mb_type))
1204 continue;
1205 if (!(error & ER_MV_ERROR))
1206 continue; // inter with undamaged MV
1207 if (!(error & ER_AC_ERROR))
1208 continue; // undamaged inter
1209
1210 if (!(s->last_pic.f && s->last_pic.f->data[0]))
1211 mv_dir &= ~MV_DIR_FORWARD;
1212 if (!(s->next_pic.f && s->next_pic.f->data[0]))
1213 mv_dir &= ~MV_DIR_BACKWARD;
1214
1215 if (s->pp_time) {
1216 int time_pp = s->pp_time;
1217 int time_pb = s->pb_time;
1218
1219 av_assert0(s->avctx->codec_id != AV_CODEC_ID_H264);
1220 ff_thread_progress_await(s->next_pic.progress, mb_y);
1221
1222 s->mv[0][0][0] = s->next_pic.motion_val[0][xy][0] * time_pb / time_pp;
1223 s->mv[0][0][1] = s->next_pic.motion_val[0][xy][1] * time_pb / time_pp;
1224 s->mv[1][0][0] = s->next_pic.motion_val[0][xy][0] * (time_pb - time_pp) / time_pp;
1225 s->mv[1][0][1] = s->next_pic.motion_val[0][xy][1] * (time_pb - time_pp) / time_pp;
1226 } else {
1227 s->mv[0][0][0] = 0;
1228 s->mv[0][0][1] = 0;
1229 s->mv[1][0][0] = 0;
1230 s->mv[1][0][1] = 0;
1231 }
1232
1233 s->decode_mb(s->opaque, 0, mv_dir, MV_TYPE_16X16, &s->mv,
1234 mb_x, mb_y, 0, 0);
1235 }
1236 }
1237 } else
1238 guess_mv(s);
1239
1240 /* fill DC for inter blocks */
1241 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1242 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1243 int dc, dcu, dcv, y, n;
1244 int16_t *dc_ptr;
1245 uint8_t *dest_y, *dest_cb, *dest_cr;
1246 const int mb_xy = mb_x + mb_y * s->mb_stride;
1247 const int mb_type = s->cur_pic.mb_type[mb_xy];
1248
1249 // error = s->error_status_table[mb_xy];
1250
1251 if (IS_INTRA(mb_type) && s->partitioned_frame)
1252 continue;
1253 // if (error & ER_MV_ERROR)
1254 // continue; // inter data damaged FIXME is this good?
1255
1256 dest_y = s->cur_pic.f->data[0] + mb_x * 16 + mb_y * 16 * linesize[0];
1257 dest_cb = s->cur_pic.f->data[1] + mb_x * 8 + mb_y * 8 * linesize[1];
1258 dest_cr = s->cur_pic.f->data[2] + mb_x * 8 + mb_y * 8 * linesize[2];
1259
1260 dc_ptr = &s->dc_val[0][mb_x * 2 + mb_y * 2 * s->b8_stride];
1261 for (n = 0; n < 4; n++) {
1262 dc = 0;
1263 for (y = 0; y < 8; y++) {
1264 int x;
1265 for (x = 0; x < 8; x++)
1266 dc += dest_y[x + (n & 1) * 8 +
1267 (y + (n >> 1) * 8) * linesize[0]];
1268 }
1269 dc_ptr[(n & 1) + (n >> 1) * s->b8_stride] = (dc + 4) >> 3;
1270 }
1271
1272 if (!s->cur_pic.f->data[2])
1273 continue;
1274
1275 dcu = dcv = 0;
1276 for (y = 0; y < 8; y++) {
1277 int x;
1278 for (x = 0; x < 8; x++) {
1279 dcu += dest_cb[x + y * linesize[1]];
1280 dcv += dest_cr[x + y * linesize[2]];
1281 }
1282 }
1283 s->dc_val[1][mb_x + mb_y * s->mb_stride] = (dcu + 4) >> 3;
1284 s->dc_val[2][mb_x + mb_y * s->mb_stride] = (dcv + 4) >> 3;
1285 }
1286 }
1287#if 1
1288 /* guess DC for damaged blocks */
1289 guess_dc(s, s->dc_val[0], s->mb_width*2, s->mb_height*2, s->b8_stride, 1);
1290 guess_dc(s, s->dc_val[1], s->mb_width , s->mb_height , s->mb_stride, 0);
1291 guess_dc(s, s->dc_val[2], s->mb_width , s->mb_height , s->mb_stride, 0);
1292#endif
1293
1294 /* filter luma DC */
1295 filter181(s->dc_val[0], s->mb_width * 2, s->mb_height * 2, s->b8_stride);
1296
1297#if 1
1298 /* render DC only intra */
1299 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1300 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1301 uint8_t *dest_y, *dest_cb, *dest_cr;
1302 const int mb_xy = mb_x + mb_y * s->mb_stride;
1303 const int mb_type = s->cur_pic.mb_type[mb_xy];
1304
1305 int error = s->error_status_table[mb_xy];
1306
1307 if (IS_INTER(mb_type))
1308 continue;
1309 if (!(error & ER_AC_ERROR))
1310 continue; // undamaged
1311
1312 dest_y = s->cur_pic.f->data[0] + mb_x * 16 + mb_y * 16 * linesize[0];
1313 dest_cb = s->cur_pic.f->data[1] + mb_x * 8 + mb_y * 8 * linesize[1];
1314 dest_cr = s->cur_pic.f->data[2] + mb_x * 8 + mb_y * 8 * linesize[2];
1315 if (!s->cur_pic.f->data[2])
1316 dest_cb = dest_cr = NULL;
1317
1318 put_dc(s, dest_y, dest_cb, dest_cr, mb_x, mb_y);
1319 }
1320 }
1321#endif
1322
1323 if (s->avctx->error_concealment & FF_EC_DEBLOCK) {
1324 /* filter horizontal block boundaries */
1325 h_block_filter(s, s->cur_pic.f->data[0], s->mb_width * 2,
1326 s->mb_height * 2, linesize[0], 1);
1327
1328 /* filter vertical block boundaries */
1329 v_block_filter(s, s->cur_pic.f->data[0], s->mb_width * 2,
1330 s->mb_height * 2, linesize[0], 1);
1331
1332 if (s->cur_pic.f->data[2]) {
1333 h_block_filter(s, s->cur_pic.f->data[1], s->mb_width,
1334 s->mb_height, linesize[1], 0);
1335 h_block_filter(s, s->cur_pic.f->data[2], s->mb_width,
1336 s->mb_height, linesize[2], 0);
1337 v_block_filter(s, s->cur_pic.f->data[1], s->mb_width,
1338 s->mb_height, linesize[1], 0);
1339 v_block_filter(s, s->cur_pic.f->data[2], s->mb_width,
1340 s->mb_height, linesize[2], 0);
1341 }
1342 }
1343
1344 /* clean a few tables */
1345 for (i = 0; i < s->mb_num; i++) {
1346 const int mb_xy = s->mb_index2xy[i];
1347 int error = s->error_status_table[mb_xy];
1348
1349 if (s->mbskip_table && s->cur_pic.f->pict_type != AV_PICTURE_TYPE_B &&
1350 (error & (ER_DC_ERROR | ER_MV_ERROR | ER_AC_ERROR))) {
1351 s->mbskip_table[mb_xy] = 0;
1352 }
1353 if (s->mbintra_table)
1354 s->mbintra_table[mb_xy] = 1;
1355 }
1356
1357 memset(&s->cur_pic, 0, sizeof(ERPicture));
1358 memset(&s->last_pic, 0, sizeof(ERPicture));
1359 memset(&s->next_pic, 0, sizeof(ERPicture));
1360
1361cleanup:
1362 for (i = 0; i < 2; i++) {
1363 av_freep(&s->ref_index[i]);
1364 av_freep(&s->motion_val_base[i]);
1365 s->cur_pic.ref_index[i] = NULL;
1366 s->cur_pic.motion_val[i] = NULL;
1367 }
1368}
dst
uint8_t ptrdiff_t const uint8_t ptrdiff_t int intptr_t intptr_t int int16_t * dst
Definition dsp.h:87
avassert.h
simple assert() macros that are a bit more flexible than ISO C assert().
av_assert2
#define av_assert2(cond)
assert() equivalent, that does lie in speed critical code.
Definition avassert.h:68
av_assert1
#define av_assert1(cond)
assert() equivalent, that does not lie in speed critical code.
Definition avassert.h:58
av_assert0
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition avassert.h:42
avcodec.h
Libavcodec external API header.
FF_EC_DEBLOCK
#define FF_EC_DEBLOCK
Definition avcodec.h:1384
FF_EC_FAVOR_INTER
#define FF_EC_FAVOR_INTER
Definition avcodec.h:1385
FF_DEBUG_ER
#define FF_DEBUG_ER
Definition avcodec.h:1401
FF_THREAD_SLICE
#define FF_THREAD_SLICE
Decode more than one part of a single frame at once.
Definition avcodec.h:1591
FF_EC_GUESS_MVS
#define FF_EC_GUESS_MVS
Definition avcodec.h:1383
i
#define i(width, name, range_min, range_max)
Definition cbs_h264.c:63
f
#define f(width, name)
Definition cbs_vp8.c:236
s
#define s(width, name)
Definition cbs_vp9.c:198
av_clip
#define av_clip
Definition common.h:100
FFABS
#define FFABS(a)
Absolute value, Note, INT_MIN / INT64_MIN result in undefined behavior as they are not representable ...
Definition common.h:74
NULL
#define NULL
Definition coverity.c:32
int64_t
long long int64_t
Definition coverity.c:34
AV_EF_EXPLODE
#define AV_EF_EXPLODE
abort decoding on minor error detection
Definition defs.h:51
atomic_store
#define atomic_store(object, desired)
Definition stdatomic.h:85
atomic_load
#define atomic_load(object)
Definition stdatomic.h:93
atomic_init
#define atomic_init(obj, value)
Definition stdatomic.h:33
cm
#define cm
Definition dvbsubdec.c:40
ff_er_add_slice
void ff_er_add_slice(ERContext *s, int startx, int starty, int endx, int endy, int status)
Add a slice.
Definition error_resilience.c:840
v_block_filter
static void v_block_filter(ERContext *s, uint8_t *dst, int w, int h, ptrdiff_t stride, int is_luma)
simple vertical deblocking filter used for error resilience
Definition error_resilience.c:330
guess_mv
static void guess_mv(ERContext *s)
Definition error_resilience.c:410
set_mv_strides
static void set_mv_strides(ERContext *s, ptrdiff_t *mv_step, ptrdiff_t *stride)
Definition error_resilience.c:64
add_blocklist
static av_always_inline void add_blocklist(int(*blocklist)[2], int *blocklist_length, uint8_t *fixed, int mb_x, int mb_y, int mb_xy)
Definition error_resilience.c:401
MV_FROZEN
#define MV_FROZEN
Definition error_resilience.c:397
MV_UNCHANGED
#define MV_UNCHANGED
Definition error_resilience.c:399
er_supported
static int er_supported(ERContext *s)
Definition error_resilience.c:823
h_block_filter
static void h_block_filter(ERContext *s, uint8_t *dst, int w, int h, ptrdiff_t stride, int is_luma)
simple horizontal deblocking filter used for error resilience
Definition error_resilience.c:261
ff_er_init
av_cold int ff_er_init(ERContext *const s)
Definition error_resilience.c:42
is_intra_more_likely
static int is_intra_more_likely(ERContext *s)
Definition error_resilience.c:743
put_dc
static void put_dc(ERContext *s, uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr, int mb_x, int mb_y)
Replace the current MB with a flat dc-only version.
Definition error_resilience.c:79
MV_LISTED
#define MV_LISTED
Definition error_resilience.c:400
filter181
static void filter181(int16_t *data, int width, int height, ptrdiff_t stride)
Definition error_resilience.c:117
guess_dc
static void guess_dc(ERContext *s, int16_t *dc, int w, int h, ptrdiff_t stride, int is_luma)
guess the dc of blocks which do not have an undamaged dc
Definition error_resilience.c:158
ff_er_frame_end
void ff_er_frame_end(ERContext *s, int *decode_error_flags)
Indicate that a frame has finished decoding and perform error concealment in case it has been enabled...
Definition error_resilience.c:910
ff_er_frame_start
void ff_er_frame_start(ERContext *s)
Definition error_resilience.c:812
MV_CHANGED
#define MV_CHANGED
Definition error_resilience.c:398
error_resilience.h
VP_START
#define VP_START
current MB is the first after a resync marker
Definition error_resilience.h:28
ER_DC_ERROR
#define ER_DC_ERROR
Definition error_resilience.h:30
ER_AC_ERROR
#define ER_AC_ERROR
Definition error_resilience.h:29
ER_MB_END
#define ER_MB_END
Definition error_resilience.h:37
ER_MV_ERROR
#define ER_MV_ERROR
Definition error_resilience.h:31
ER_MV_END
#define ER_MV_END
Definition error_resilience.h:34
ER_AC_END
#define ER_AC_END
Definition error_resilience.h:32
ER_DC_END
#define ER_DC_END
Definition error_resilience.h:33
ER_MB_ERROR
#define ER_MB_ERROR
Definition error_resilience.h:36
cleanup
static av_cold void cleanup(FlashSV2Context *s)
Definition flashsv2enc.c:130
FF_DECODE_ERROR_CONCEALMENT_ACTIVE
#define FF_DECODE_ERROR_CONCEALMENT_ACTIVE
Definition frame.h:762
fail
#define fail
Definition test.h:479
AV_CODEC_ID_H264
@ AV_CODEC_ID_H264
Definition codec_id.h:77
AV_CODEC_ID_MPEG2VIDEO
@ AV_CODEC_ID_MPEG2VIDEO
preferred ID for MPEG-1/2 video decoding
Definition codec_id.h:52
AVERROR
#define AVERROR(e)
Definition error.h:45
AV_LOG_DEBUG
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition log.h:231
AV_LOG_WARNING
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition log.h:216
AV_LOG_INFO
#define AV_LOG_INFO
Standard information.
Definition log.h:221
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition log.h:210
av_get_picture_type_char
char av_get_picture_type_char(enum AVPictureType pict_type)
Return a single letter to describe the given picture type pict_type.
Definition utils.c:40
AV_PICTURE_TYPE_I
@ AV_PICTURE_TYPE_I
Intra.
Definition avutil.h:278
AV_PICTURE_TYPE_B
@ AV_PICTURE_TYPE_B
Bi-dir predicted.
Definition avutil.h:280
a
int a
Definition h264pred_template.c:416
b
#define b
Definition input.c:43
offset
unsigned offset
Definition libaomenc.c:763
fixed
#define fixed(width, name, value)
Definition cbs_apv.c:75
attributes.h
Macro definitions for various function/variable attributes.
av_always_inline
#define av_always_inline
Definition attributes.h:72
av_cold
#define av_cold
Definition attributes.h:117
w
uint8_t w
Definition llvidencdsp.c:39
mask
static const uint16_t mask[17]
Definition lzw.c:38
FFSWAP
#define FFSWAP(type, a, b)
Definition macros.h:52
FFMIN
#define FFMIN(a, b)
Definition macros.h:49
FFMAX
#define FFMAX(a, b)
Definition macros.h:47
FFALIGN
#define FFALIGN(x, a)
Definition macros.h:78
MAX_NEG_CROP
#define MAX_NEG_CROP
Definition mathops.h:31
ff_me_cmp_init
av_cold void ff_me_cmp_init(MECmpContext *c, AVCodecContext *avctx)
Definition me_cmp.c:961
me_cmp.h
av_calloc
void * av_calloc(size_t nmemb, size_t size)
Definition mem.c:264
mem.h
Memory handling functions.
ff_crop_tab
#define ff_crop_tab
Definition motionpixels_tablegen.c:26
MB_TYPE_INTRA4x4
#define MB_TYPE_INTRA4x4
Definition mpegutils.h:38
IS_INTER
#define IS_INTER(a)
Definition mpegutils.h:73
IS_8X8
#define IS_8X8(a)
Definition mpegutils.h:83
MB_TYPE_16x16
#define MB_TYPE_16x16
Definition mpegutils.h:41
MB_TYPE_L0
#define MB_TYPE_L0
Definition mpegutils.h:57
MB_TYPE_FORWARD_MV
#define MB_TYPE_FORWARD_MV
Definition mpegutils.h:49
mpegvideo.h
mpegvideo header.
MV_DIR_BACKWARD
#define MV_DIR_BACKWARD
Definition mpegvideo.h:169
MV_DIR_FORWARD
#define MV_DIR_FORWARD
Definition mpegvideo.h:168
MV_TYPE_8X8
#define MV_TYPE_8X8
4 vectors (H.263, MPEG-4 4MV)
Definition mpegvideo.h:173
MV_TYPE_16X16
#define MV_TYPE_16X16
1 vector for the whole mb
Definition mpegvideo.h:172
data
const char data[16]
Definition mxf.c:149
distance
static float distance(float x, float y, int band)
Definition nellymoserenc.c:231
IS_INTRA
#define IS_INTRA(x, y)
ff_thread_await_progress
void ff_thread_await_progress(const ThreadFrame *f, int n, int field)
Wait for earlier decoding threads to finish reference pictures.
Definition pthread_frame.c:644
weight
const h264_weight_func weight
Definition h264dsp_init.c:33
MECmpContext::sad
me_cmp_func sad[6]
Definition me_cmp.h:53
stride
#define stride
Definition h264pred_template.c:536
av_malloc_array
#define av_malloc_array(a, b)
Definition tableprint_vlc.h:32
av_mallocz
#define av_mallocz(s)
Definition tableprint_vlc.h:31
av_freep
#define av_freep(p)
Definition tableprint_vlc.h:35
av_log
#define av_log(a,...)
Definition tableprint_vlc.h:27
error
static void error(const char *err)
Definition target_bsf_fuzzer.c:32
src
#define src
Definition vp8dsp.c:248
ref
static int ref[MAX_W *MAX_W]
Definition jpeg2000dwt.c:117
height
#define height
Definition dsp.h:89
width
#define width
Definition dsp.h:89
ff_thread_progress_await
void ff_thread_progress_await(const ThreadProgress *pro_c, int n)
This function is a no-op in no-op mode; otherwise it waits until other threads have reached a certain...
Definition threadprogress.c:64
size
int size
Definition twinvq_data.h:10344
h
h
Definition vp9dsp_template.c:2070
c
static double c[64]
Definition vsrc_mptestsrc.c:89
atomic_fetch_add
#define atomic_fetch_add(object, operand)
Definition stdatomic.h:137
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