Libav
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 Libav.
7  *
8  * Libav is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU Lesser General Public
10  * License as published by the Free Software Foundation; either
11  * version 2.1 of the License, or (at your option) any later version.
12  *
13  * Libav is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16  * Lesser General Public License for more details.
17  *
18  * You should have received a copy of the GNU Lesser General Public
19  * License along with Libav; if not, write to the Free Software
20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21  */
22 
28 #include <limits.h>
29 
30 #include "libavutil/internal.h"
31 #include "avcodec.h"
32 #include "error_resilience.h"
33 #include "mpegutils.h"
34 #include "mpegvideo.h"
35 #include "rectangle.h"
36 #include "thread.h"
37 #include "version.h"
38 
43 static void set_mv_strides(ERContext *s, int *mv_step, int *stride)
44 {
45  if (s->avctx->codec_id == AV_CODEC_ID_H264) {
46  assert(s->quarter_sample);
47  *mv_step = 4;
48  *stride = s->mb_width * 4;
49  } else {
50  *mv_step = 2;
51  *stride = s->b8_stride;
52  }
53 }
54 
58 static void put_dc(ERContext *s, uint8_t *dest_y, uint8_t *dest_cb,
59  uint8_t *dest_cr, int mb_x, int mb_y)
60 {
61  int *linesize = s->cur_pic.f->linesize;
62  int dc, dcu, dcv, y, i;
63  for (i = 0; i < 4; i++) {
64  dc = s->dc_val[0][mb_x * 2 + (i & 1) + (mb_y * 2 + (i >> 1)) * s->b8_stride];
65  if (dc < 0)
66  dc = 0;
67  else if (dc > 2040)
68  dc = 2040;
69  for (y = 0; y < 8; y++) {
70  int x;
71  for (x = 0; x < 8; x++)
72  dest_y[x + (i & 1) * 8 + (y + (i >> 1) * 8) * linesize[0]] = dc / 8;
73  }
74  }
75  dcu = s->dc_val[1][mb_x + mb_y * s->mb_stride];
76  dcv = s->dc_val[2][mb_x + mb_y * s->mb_stride];
77  if (dcu < 0)
78  dcu = 0;
79  else if (dcu > 2040)
80  dcu = 2040;
81  if (dcv < 0)
82  dcv = 0;
83  else if (dcv > 2040)
84  dcv = 2040;
85  for (y = 0; y < 8; y++) {
86  int x;
87  for (x = 0; x < 8; x++) {
88  dest_cb[x + y * linesize[1]] = dcu / 8;
89  dest_cr[x + y * linesize[2]] = dcv / 8;
90  }
91  }
92 }
93 
94 static void filter181(int16_t *data, int width, int height, int stride)
95 {
96  int x, y;
97 
98  /* horizontal filter */
99  for (y = 1; y < height - 1; y++) {
100  int prev_dc = data[0 + y * stride];
101 
102  for (x = 1; x < width - 1; x++) {
103  int dc;
104  dc = -prev_dc +
105  data[x + y * stride] * 8 -
106  data[x + 1 + y * stride];
107  dc = (dc * 10923 + 32768) >> 16;
108  prev_dc = data[x + y * stride];
109  data[x + y * stride] = dc;
110  }
111  }
112 
113  /* vertical filter */
114  for (x = 1; x < width - 1; x++) {
115  int prev_dc = data[x];
116 
117  for (y = 1; y < height - 1; y++) {
118  int dc;
119 
120  dc = -prev_dc +
121  data[x + y * stride] * 8 -
122  data[x + (y + 1) * stride];
123  dc = (dc * 10923 + 32768) >> 16;
124  prev_dc = data[x + y * stride];
125  data[x + y * stride] = dc;
126  }
127  }
128 }
129 
135 static void guess_dc(ERContext *s, int16_t *dc, int w,
136  int h, int stride, int is_luma)
137 {
138  int b_x, b_y;
139 
140  for (b_y = 0; b_y < h; b_y++) {
141  for (b_x = 0; b_x < w; b_x++) {
142  int color[4] = { 1024, 1024, 1024, 1024 };
143  int distance[4] = { 9999, 9999, 9999, 9999 };
144  int mb_index, error, j;
145  int64_t guess, weight_sum;
146  mb_index = (b_x >> is_luma) + (b_y >> is_luma) * s->mb_stride;
147  error = s->error_status_table[mb_index];
148 
149  if (IS_INTER(s->cur_pic.mb_type[mb_index]))
150  continue; // inter
151  if (!(error & ER_DC_ERROR))
152  continue; // dc-ok
153 
154  /* right block */
155  for (j = b_x + 1; j < w; j++) {
156  int mb_index_j = (j >> is_luma) + (b_y >> is_luma) * s->mb_stride;
157  int error_j = s->error_status_table[mb_index_j];
158  int intra_j = IS_INTRA(s->cur_pic.mb_type[mb_index_j]);
159  if (intra_j == 0 || !(error_j & ER_DC_ERROR)) {
160  color[0] = dc[j + b_y * stride];
161  distance[0] = j - b_x;
162  break;
163  }
164  }
165 
166  /* left block */
167  for (j = b_x - 1; j >= 0; j--) {
168  int mb_index_j = (j >> is_luma) + (b_y >> is_luma) * s->mb_stride;
169  int error_j = s->error_status_table[mb_index_j];
170  int intra_j = IS_INTRA(s->cur_pic.mb_type[mb_index_j]);
171  if (intra_j == 0 || !(error_j & ER_DC_ERROR)) {
172  color[1] = dc[j + b_y * stride];
173  distance[1] = b_x - j;
174  break;
175  }
176  }
177 
178  /* bottom block */
179  for (j = b_y + 1; j < h; j++) {
180  int mb_index_j = (b_x >> is_luma) + (j >> is_luma) * s->mb_stride;
181  int error_j = s->error_status_table[mb_index_j];
182  int intra_j = IS_INTRA(s->cur_pic.mb_type[mb_index_j]);
183 
184  if (intra_j == 0 || !(error_j & ER_DC_ERROR)) {
185  color[2] = dc[b_x + j * stride];
186  distance[2] = j - b_y;
187  break;
188  }
189  }
190 
191  /* top block */
192  for (j = b_y - 1; j >= 0; j--) {
193  int mb_index_j = (b_x >> is_luma) + (j >> is_luma) * s->mb_stride;
194  int error_j = s->error_status_table[mb_index_j];
195  int intra_j = IS_INTRA(s->cur_pic.mb_type[mb_index_j]);
196  if (intra_j == 0 || !(error_j & ER_DC_ERROR)) {
197  color[3] = dc[b_x + j * stride];
198  distance[3] = b_y - j;
199  break;
200  }
201  }
202 
203  weight_sum = 0;
204  guess = 0;
205  for (j = 0; j < 4; j++) {
206  int64_t weight = 256 * 256 * 256 * 16 / distance[j];
207  guess += weight * (int64_t) color[j];
208  weight_sum += weight;
209  }
210  guess = (guess + weight_sum / 2) / weight_sum;
211  dc[b_x + b_y * stride] = guess;
212  }
213  }
214 }
215 
221 static void h_block_filter(ERContext *s, uint8_t *dst, int w,
222  int h, int stride, int is_luma)
223 {
224  int b_x, b_y, mvx_stride, mvy_stride;
225  const uint8_t *cm = ff_crop_tab + MAX_NEG_CROP;
226  set_mv_strides(s, &mvx_stride, &mvy_stride);
227  mvx_stride >>= is_luma;
228  mvy_stride *= mvx_stride;
229 
230  for (b_y = 0; b_y < h; b_y++) {
231  for (b_x = 0; b_x < w - 1; b_x++) {
232  int y;
233  int left_status = s->error_status_table[( b_x >> is_luma) + (b_y >> is_luma) * s->mb_stride];
234  int right_status = s->error_status_table[((b_x + 1) >> is_luma) + (b_y >> is_luma) * s->mb_stride];
235  int left_intra = IS_INTRA(s->cur_pic.mb_type[( b_x >> is_luma) + (b_y >> is_luma) * s->mb_stride]);
236  int right_intra = IS_INTRA(s->cur_pic.mb_type[((b_x + 1) >> is_luma) + (b_y >> is_luma) * s->mb_stride]);
237  int left_damage = left_status & ER_MB_ERROR;
238  int right_damage = right_status & ER_MB_ERROR;
239  int offset = b_x * 8 + b_y * stride * 8;
240  int16_t *left_mv = s->cur_pic.motion_val[0][mvy_stride * b_y + mvx_stride * b_x];
241  int16_t *right_mv = s->cur_pic.motion_val[0][mvy_stride * b_y + mvx_stride * (b_x + 1)];
242  if (!(left_damage || right_damage))
243  continue; // both undamaged
244  if ((!left_intra) && (!right_intra) &&
245  FFABS(left_mv[0] - right_mv[0]) +
246  FFABS(left_mv[1] + right_mv[1]) < 2)
247  continue;
248 
249  for (y = 0; y < 8; y++) {
250  int a, b, c, d;
251 
252  a = dst[offset + 7 + y * stride] - dst[offset + 6 + y * stride];
253  b = dst[offset + 8 + y * stride] - dst[offset + 7 + y * stride];
254  c = dst[offset + 9 + y * stride] - dst[offset + 8 + y * stride];
255 
256  d = FFABS(b) - ((FFABS(a) + FFABS(c) + 1) >> 1);
257  d = FFMAX(d, 0);
258  if (b < 0)
259  d = -d;
260 
261  if (d == 0)
262  continue;
263 
264  if (!(left_damage && right_damage))
265  d = d * 16 / 9;
266 
267  if (left_damage) {
268  dst[offset + 7 + y * stride] = cm[dst[offset + 7 + y * stride] + ((d * 7) >> 4)];
269  dst[offset + 6 + y * stride] = cm[dst[offset + 6 + y * stride] + ((d * 5) >> 4)];
270  dst[offset + 5 + y * stride] = cm[dst[offset + 5 + y * stride] + ((d * 3) >> 4)];
271  dst[offset + 4 + y * stride] = cm[dst[offset + 4 + y * stride] + ((d * 1) >> 4)];
272  }
273  if (right_damage) {
274  dst[offset + 8 + y * stride] = cm[dst[offset + 8 + y * stride] - ((d * 7) >> 4)];
275  dst[offset + 9 + y * stride] = cm[dst[offset + 9 + y * stride] - ((d * 5) >> 4)];
276  dst[offset + 10+ y * stride] = cm[dst[offset + 10 + y * stride] - ((d * 3) >> 4)];
277  dst[offset + 11+ y * stride] = cm[dst[offset + 11 + y * stride] - ((d * 1) >> 4)];
278  }
279  }
280  }
281  }
282 }
283 
289 static void v_block_filter(ERContext *s, uint8_t *dst, int w, int h,
290  int stride, int is_luma)
291 {
292  int b_x, b_y, mvx_stride, mvy_stride;
293  const uint8_t *cm = ff_crop_tab + MAX_NEG_CROP;
294  set_mv_strides(s, &mvx_stride, &mvy_stride);
295  mvx_stride >>= is_luma;
296  mvy_stride *= mvx_stride;
297 
298  for (b_y = 0; b_y < h - 1; b_y++) {
299  for (b_x = 0; b_x < w; b_x++) {
300  int x;
301  int top_status = s->error_status_table[(b_x >> is_luma) + (b_y >> is_luma) * s->mb_stride];
302  int bottom_status = s->error_status_table[(b_x >> is_luma) + ((b_y + 1) >> is_luma) * s->mb_stride];
303  int top_intra = IS_INTRA(s->cur_pic.mb_type[(b_x >> is_luma) + ( b_y >> is_luma) * s->mb_stride]);
304  int bottom_intra = IS_INTRA(s->cur_pic.mb_type[(b_x >> is_luma) + ((b_y + 1) >> is_luma) * s->mb_stride]);
305  int top_damage = top_status & ER_MB_ERROR;
306  int bottom_damage = bottom_status & ER_MB_ERROR;
307  int offset = b_x * 8 + b_y * stride * 8;
308 
309  int16_t *top_mv = s->cur_pic.motion_val[0][mvy_stride * b_y + mvx_stride * b_x];
310  int16_t *bottom_mv = s->cur_pic.motion_val[0][mvy_stride * (b_y + 1) + mvx_stride * b_x];
311 
312  if (!(top_damage || bottom_damage))
313  continue; // both undamaged
314 
315  if ((!top_intra) && (!bottom_intra) &&
316  FFABS(top_mv[0] - bottom_mv[0]) +
317  FFABS(top_mv[1] + bottom_mv[1]) < 2)
318  continue;
319 
320  for (x = 0; x < 8; x++) {
321  int a, b, c, d;
322 
323  a = dst[offset + x + 7 * stride] - dst[offset + x + 6 * stride];
324  b = dst[offset + x + 8 * stride] - dst[offset + x + 7 * stride];
325  c = dst[offset + x + 9 * stride] - dst[offset + x + 8 * stride];
326 
327  d = FFABS(b) - ((FFABS(a) + FFABS(c) + 1) >> 1);
328  d = FFMAX(d, 0);
329  if (b < 0)
330  d = -d;
331 
332  if (d == 0)
333  continue;
334 
335  if (!(top_damage && bottom_damage))
336  d = d * 16 / 9;
337 
338  if (top_damage) {
339  dst[offset + x + 7 * stride] = cm[dst[offset + x + 7 * stride] + ((d * 7) >> 4)];
340  dst[offset + x + 6 * stride] = cm[dst[offset + x + 6 * stride] + ((d * 5) >> 4)];
341  dst[offset + x + 5 * stride] = cm[dst[offset + x + 5 * stride] + ((d * 3) >> 4)];
342  dst[offset + x + 4 * stride] = cm[dst[offset + x + 4 * stride] + ((d * 1) >> 4)];
343  }
344  if (bottom_damage) {
345  dst[offset + x + 8 * stride] = cm[dst[offset + x + 8 * stride] - ((d * 7) >> 4)];
346  dst[offset + x + 9 * stride] = cm[dst[offset + x + 9 * stride] - ((d * 5) >> 4)];
347  dst[offset + x + 10 * stride] = cm[dst[offset + x + 10 * stride] - ((d * 3) >> 4)];
348  dst[offset + x + 11 * stride] = cm[dst[offset + x + 11 * stride] - ((d * 1) >> 4)];
349  }
350  }
351  }
352  }
353 }
354 
355 static void guess_mv(ERContext *s)
356 {
357  uint8_t *fixed = s->er_temp_buffer;
358 #define MV_FROZEN 3
359 #define MV_CHANGED 2
360 #define MV_UNCHANGED 1
361  const int mb_stride = s->mb_stride;
362  const int mb_width = s->mb_width;
363  const int mb_height = s->mb_height;
364  int i, depth, num_avail;
365  int mb_x, mb_y, mot_step, mot_stride;
366 
367  set_mv_strides(s, &mot_step, &mot_stride);
368 
369  num_avail = 0;
370  for (i = 0; i < s->mb_num; i++) {
371  const int mb_xy = s->mb_index2xy[i];
372  int f = 0;
373  int error = s->error_status_table[mb_xy];
374 
375  if (IS_INTRA(s->cur_pic.mb_type[mb_xy]))
376  f = MV_FROZEN; // intra // FIXME check
377  if (!(error & ER_MV_ERROR))
378  f = MV_FROZEN; // inter with undamaged MV
379 
380  fixed[mb_xy] = f;
381  if (f == MV_FROZEN)
382  num_avail++;
383  }
384 
385  if ((!(s->avctx->error_concealment&FF_EC_GUESS_MVS)) ||
386  num_avail <= mb_width / 2) {
387  for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
388  for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
389  const int mb_xy = mb_x + mb_y * s->mb_stride;
390  int mv_dir = (s->last_pic.f && s->last_pic.f->data[0]) ? MV_DIR_FORWARD : MV_DIR_BACKWARD;
391 
392  if (IS_INTRA(s->cur_pic.mb_type[mb_xy]))
393  continue;
394  if (!(s->error_status_table[mb_xy] & ER_MV_ERROR))
395  continue;
396 
397  s->mv[0][0][0] = 0;
398  s->mv[0][0][1] = 0;
399  s->decode_mb(s->opaque, 0, mv_dir, MV_TYPE_16X16, &s->mv,
400  mb_x, mb_y, 0, 0);
401  }
402  }
403  return;
404  }
405 
406  for (depth = 0; ; depth++) {
407  int changed, pass, none_left;
408 
409  none_left = 1;
410  changed = 1;
411  for (pass = 0; (changed || pass < 2) && pass < 10; pass++) {
412  int mb_x, mb_y;
413  int score_sum = 0;
414 
415  changed = 0;
416  for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
417  for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
418  const int mb_xy = mb_x + mb_y * s->mb_stride;
419  int mv_predictor[8][2] = { { 0 } };
420  int ref[8] = { 0 };
421  int pred_count = 0;
422  int j;
423  int best_score = 256 * 256 * 256 * 64;
424  int best_pred = 0;
425  const int mot_index = (mb_x + mb_y * mot_stride) * mot_step;
426  int prev_x, prev_y, prev_ref;
427 
428  if ((mb_x ^ mb_y ^ pass) & 1)
429  continue;
430 
431  if (fixed[mb_xy] == MV_FROZEN)
432  continue;
433  assert(!IS_INTRA(s->cur_pic.mb_type[mb_xy]));
434  assert(s->last_pic && s->last_pic.f->data[0]);
435 
436  j = 0;
437  if (mb_x > 0 && fixed[mb_xy - 1] == MV_FROZEN)
438  j = 1;
439  if (mb_x + 1 < mb_width && fixed[mb_xy + 1] == MV_FROZEN)
440  j = 1;
441  if (mb_y > 0 && fixed[mb_xy - mb_stride] == MV_FROZEN)
442  j = 1;
443  if (mb_y + 1 < mb_height && fixed[mb_xy + mb_stride] == MV_FROZEN)
444  j = 1;
445  if (j == 0)
446  continue;
447 
448  j = 0;
449  if (mb_x > 0 && fixed[mb_xy - 1 ] == MV_CHANGED)
450  j = 1;
451  if (mb_x + 1 < mb_width && fixed[mb_xy + 1 ] == MV_CHANGED)
452  j = 1;
453  if (mb_y > 0 && fixed[mb_xy - mb_stride] == MV_CHANGED)
454  j = 1;
455  if (mb_y + 1 < mb_height && fixed[mb_xy + mb_stride] == MV_CHANGED)
456  j = 1;
457  if (j == 0 && pass > 1)
458  continue;
459 
460  none_left = 0;
461 
462  if (mb_x > 0 && fixed[mb_xy - 1]) {
463  mv_predictor[pred_count][0] =
464  s->cur_pic.motion_val[0][mot_index - mot_step][0];
465  mv_predictor[pred_count][1] =
466  s->cur_pic.motion_val[0][mot_index - mot_step][1];
467  ref[pred_count] =
468  s->cur_pic.ref_index[0][4 * (mb_xy - 1)];
469  pred_count++;
470  }
471  if (mb_x + 1 < mb_width && fixed[mb_xy + 1]) {
472  mv_predictor[pred_count][0] =
473  s->cur_pic.motion_val[0][mot_index + mot_step][0];
474  mv_predictor[pred_count][1] =
475  s->cur_pic.motion_val[0][mot_index + mot_step][1];
476  ref[pred_count] =
477  s->cur_pic.ref_index[0][4 * (mb_xy + 1)];
478  pred_count++;
479  }
480  if (mb_y > 0 && fixed[mb_xy - mb_stride]) {
481  mv_predictor[pred_count][0] =
482  s->cur_pic.motion_val[0][mot_index - mot_stride * mot_step][0];
483  mv_predictor[pred_count][1] =
484  s->cur_pic.motion_val[0][mot_index - mot_stride * mot_step][1];
485  ref[pred_count] =
486  s->cur_pic.ref_index[0][4 * (mb_xy - s->mb_stride)];
487  pred_count++;
488  }
489  if (mb_y + 1<mb_height && fixed[mb_xy + mb_stride]) {
490  mv_predictor[pred_count][0] =
491  s->cur_pic.motion_val[0][mot_index + mot_stride * mot_step][0];
492  mv_predictor[pred_count][1] =
493  s->cur_pic.motion_val[0][mot_index + mot_stride * mot_step][1];
494  ref[pred_count] =
495  s->cur_pic.ref_index[0][4 * (mb_xy + s->mb_stride)];
496  pred_count++;
497  }
498  if (pred_count == 0)
499  continue;
500 
501  if (pred_count > 1) {
502  int sum_x = 0, sum_y = 0, sum_r = 0;
503  int max_x, max_y, min_x, min_y, max_r, min_r;
504 
505  for (j = 0; j < pred_count; j++) {
506  sum_x += mv_predictor[j][0];
507  sum_y += mv_predictor[j][1];
508  sum_r += ref[j];
509  if (j && ref[j] != ref[j - 1])
510  goto skip_mean_and_median;
511  }
512 
513  /* mean */
514  mv_predictor[pred_count][0] = sum_x / j;
515  mv_predictor[pred_count][1] = sum_y / j;
516  ref[pred_count] = sum_r / j;
517 
518  /* median */
519  if (pred_count >= 3) {
520  min_y = min_x = min_r = 99999;
521  max_y = max_x = max_r = -99999;
522  } else {
523  min_x = min_y = max_x = max_y = min_r = max_r = 0;
524  }
525  for (j = 0; j < pred_count; j++) {
526  max_x = FFMAX(max_x, mv_predictor[j][0]);
527  max_y = FFMAX(max_y, mv_predictor[j][1]);
528  max_r = FFMAX(max_r, ref[j]);
529  min_x = FFMIN(min_x, mv_predictor[j][0]);
530  min_y = FFMIN(min_y, mv_predictor[j][1]);
531  min_r = FFMIN(min_r, ref[j]);
532  }
533  mv_predictor[pred_count + 1][0] = sum_x - max_x - min_x;
534  mv_predictor[pred_count + 1][1] = sum_y - max_y - min_y;
535  ref[pred_count + 1] = sum_r - max_r - min_r;
536 
537  if (pred_count == 4) {
538  mv_predictor[pred_count + 1][0] /= 2;
539  mv_predictor[pred_count + 1][1] /= 2;
540  ref[pred_count + 1] /= 2;
541  }
542  pred_count += 2;
543  }
544 
545 skip_mean_and_median:
546  /* zero MV */
547  pred_count++;
548 
549  if (!fixed[mb_xy]) {
550  if (s->avctx->codec_id == AV_CODEC_ID_H264) {
551  // FIXME
552  } else {
554  mb_y, 0);
555  }
556  if (!s->last_pic.motion_val[0] ||
557  !s->last_pic.ref_index[0])
558  goto skip_last_mv;
559  prev_x = s->last_pic.motion_val[0][mot_index][0];
560  prev_y = s->last_pic.motion_val[0][mot_index][1];
561  prev_ref = s->last_pic.ref_index[0][4 * mb_xy];
562  } else {
563  prev_x = s->cur_pic.motion_val[0][mot_index][0];
564  prev_y = s->cur_pic.motion_val[0][mot_index][1];
565  prev_ref = s->cur_pic.ref_index[0][4 * mb_xy];
566  }
567 
568  /* last MV */
569  mv_predictor[pred_count][0] = prev_x;
570  mv_predictor[pred_count][1] = prev_y;
571  ref[pred_count] = prev_ref;
572  pred_count++;
573 
574 skip_last_mv:
575 
576  for (j = 0; j < pred_count; j++) {
577  int *linesize = s->cur_pic.f->linesize;
578  int score = 0;
579  uint8_t *src = s->cur_pic.f->data[0] +
580  mb_x * 16 + mb_y * 16 * linesize[0];
581 
582  s->cur_pic.motion_val[0][mot_index][0] =
583  s->mv[0][0][0] = mv_predictor[j][0];
584  s->cur_pic.motion_val[0][mot_index][1] =
585  s->mv[0][0][1] = mv_predictor[j][1];
586 
587  // predictor intra or otherwise not available
588  if (ref[j] < 0)
589  continue;
590 
591  s->decode_mb(s->opaque, ref[j], MV_DIR_FORWARD,
592  MV_TYPE_16X16, &s->mv, mb_x, mb_y, 0, 0);
593 
594  if (mb_x > 0 && fixed[mb_xy - 1]) {
595  int k;
596  for (k = 0; k < 16; k++)
597  score += FFABS(src[k * linesize[0] - 1] -
598  src[k * linesize[0]]);
599  }
600  if (mb_x + 1 < mb_width && fixed[mb_xy + 1]) {
601  int k;
602  for (k = 0; k < 16; k++)
603  score += FFABS(src[k * linesize[0] + 15] -
604  src[k * linesize[0] + 16]);
605  }
606  if (mb_y > 0 && fixed[mb_xy - mb_stride]) {
607  int k;
608  for (k = 0; k < 16; k++)
609  score += FFABS(src[k - linesize[0]] - src[k]);
610  }
611  if (mb_y + 1 < mb_height && fixed[mb_xy + mb_stride]) {
612  int k;
613  for (k = 0; k < 16; k++)
614  score += FFABS(src[k + linesize[0] * 15] -
615  src[k + linesize[0] * 16]);
616  }
617 
618  if (score <= best_score) { // <= will favor the last MV
619  best_score = score;
620  best_pred = j;
621  }
622  }
623  score_sum += best_score;
624  s->mv[0][0][0] = mv_predictor[best_pred][0];
625  s->mv[0][0][1] = mv_predictor[best_pred][1];
626 
627  for (i = 0; i < mot_step; i++)
628  for (j = 0; j < mot_step; j++) {
629  s->cur_pic.motion_val[0][mot_index + i + j * mot_stride][0] = s->mv[0][0][0];
630  s->cur_pic.motion_val[0][mot_index + i + j * mot_stride][1] = s->mv[0][0][1];
631  }
632 
633  s->decode_mb(s->opaque, ref[best_pred], MV_DIR_FORWARD,
634  MV_TYPE_16X16, &s->mv, mb_x, mb_y, 0, 0);
635 
636 
637  if (s->mv[0][0][0] != prev_x || s->mv[0][0][1] != prev_y) {
638  fixed[mb_xy] = MV_CHANGED;
639  changed++;
640  } else
641  fixed[mb_xy] = MV_UNCHANGED;
642  }
643  }
644  }
645 
646  if (none_left)
647  return;
648 
649  for (i = 0; i < s->mb_num; i++) {
650  int mb_xy = s->mb_index2xy[i];
651  if (fixed[mb_xy])
652  fixed[mb_xy] = MV_FROZEN;
653  }
654  }
655 }
656 
658 {
659  int is_intra_likely, i, j, undamaged_count, skip_amount, mb_x, mb_y;
660 
661  if (!s->last_pic.f || !s->last_pic.f->data[0])
662  return 1; // no previous frame available -> use spatial prediction
663 
664  undamaged_count = 0;
665  for (i = 0; i < s->mb_num; i++) {
666  const int mb_xy = s->mb_index2xy[i];
667  const int error = s->error_status_table[mb_xy];
668  if (!((error & ER_DC_ERROR) && (error & ER_MV_ERROR)))
669  undamaged_count++;
670  }
671 
672  if (s->avctx->codec_id == AV_CODEC_ID_H264 && s->ref_count <= 0)
673  return 1;
674 
675  if (undamaged_count < 5)
676  return 0; // almost all MBs damaged -> use temporal prediction
677 
678 #if FF_API_XVMC
680  // prevent dsp.sad() check, that requires access to the image
682  s->avctx->xvmc_acceleration &&
684  return 1;
686 #endif /* FF_API_XVMC */
687 
688  skip_amount = FFMAX(undamaged_count / 50, 1); // check only up to 50 MBs
689  is_intra_likely = 0;
690 
691  j = 0;
692  for (mb_y = 0; mb_y < s->mb_height - 1; mb_y++) {
693  for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
694  int error;
695  const int mb_xy = mb_x + mb_y * s->mb_stride;
696 
697  error = s->error_status_table[mb_xy];
698  if ((error & ER_DC_ERROR) && (error & ER_MV_ERROR))
699  continue; // skip damaged
700 
701  j++;
702  // skip a few to speed things up
703  if ((j % skip_amount) != 0)
704  continue;
705 
706  if (s->cur_pic.f->pict_type == AV_PICTURE_TYPE_I) {
707  int *linesize = s->cur_pic.f->linesize;
708  uint8_t *mb_ptr = s->cur_pic.f->data[0] +
709  mb_x * 16 + mb_y * 16 * linesize[0];
710  uint8_t *last_mb_ptr = s->last_pic.f->data[0] +
711  mb_x * 16 + mb_y * 16 * linesize[0];
712 
713  if (s->avctx->codec_id == AV_CODEC_ID_H264) {
714  // FIXME
715  } else {
716  ff_thread_await_progress(s->last_pic.tf, mb_y, 0);
717  }
718  is_intra_likely += s->mecc->sad[0](NULL, last_mb_ptr, mb_ptr,
719  linesize[0], 16);
720  is_intra_likely -= s->mecc->sad[0](NULL, last_mb_ptr,
721  last_mb_ptr + linesize[0] * 16,
722  linesize[0], 16);
723  } else {
724  if (IS_INTRA(s->cur_pic.mb_type[mb_xy]))
725  is_intra_likely++;
726  else
727  is_intra_likely--;
728  }
729  }
730  }
731  return is_intra_likely > 0;
732 }
733 
735 {
736  if (!s->avctx->error_concealment)
737  return;
738 
740  s->mb_stride * s->mb_height * sizeof(uint8_t));
741  s->error_count = 3 * s->mb_num;
742  s->error_occurred = 0;
743 }
744 
752 void ff_er_add_slice(ERContext *s, int startx, int starty,
753  int endx, int endy, int status)
754 {
755  const int start_i = av_clip(startx + starty * s->mb_width, 0, s->mb_num - 1);
756  const int end_i = av_clip(endx + endy * s->mb_width, 0, s->mb_num);
757  const int start_xy = s->mb_index2xy[start_i];
758  const int end_xy = s->mb_index2xy[end_i];
759  int mask = -1;
760 
761  if (s->avctx->hwaccel)
762  return;
763 
764  if (start_i > end_i || start_xy > end_xy) {
766  "internal error, slice end before start\n");
767  return;
768  }
769 
770  if (!s->avctx->error_concealment)
771  return;
772 
773  mask &= ~VP_START;
774  if (status & (ER_AC_ERROR | ER_AC_END)) {
775  mask &= ~(ER_AC_ERROR | ER_AC_END);
776  s->error_count -= end_i - start_i + 1;
777  }
778  if (status & (ER_DC_ERROR | ER_DC_END)) {
779  mask &= ~(ER_DC_ERROR | ER_DC_END);
780  s->error_count -= end_i - start_i + 1;
781  }
782  if (status & (ER_MV_ERROR | ER_MV_END)) {
783  mask &= ~(ER_MV_ERROR | ER_MV_END);
784  s->error_count -= end_i - start_i + 1;
785  }
786 
787  if (status & ER_MB_ERROR) {
788  s->error_occurred = 1;
789  s->error_count = INT_MAX;
790  }
791 
792  if (mask == ~0x7F) {
793  memset(&s->error_status_table[start_xy], 0,
794  (end_xy - start_xy) * sizeof(uint8_t));
795  } else {
796  int i;
797  for (i = start_xy; i < end_xy; i++)
798  s->error_status_table[i] &= mask;
799  }
800 
801  if (end_i == s->mb_num)
802  s->error_count = INT_MAX;
803  else {
804  s->error_status_table[end_xy] &= mask;
805  s->error_status_table[end_xy] |= status;
806  }
807 
808  s->error_status_table[start_xy] |= VP_START;
809 
810  if (start_xy > 0 && s->avctx->thread_count <= 1 &&
811  s->avctx->skip_top * s->mb_width < start_i) {
812  int prev_status = s->error_status_table[s->mb_index2xy[start_i - 1]];
813 
814  prev_status &= ~ VP_START;
815  if (prev_status != (ER_MV_END | ER_DC_END | ER_AC_END))
816  s->error_count = INT_MAX;
817  }
818 }
819 
821 {
822  int *linesize = s->cur_pic.f->linesize;
823  int i, mb_x, mb_y, error, error_type, dc_error, mv_error, ac_error;
824  int distance;
825  int threshold_part[4] = { 100, 100, 100 };
826  int threshold = 50;
827  int is_intra_likely;
828 
829  /* We do not support ER of field pictures yet,
830  * though it should not crash if enabled. */
831  if (!s->avctx->error_concealment || s->error_count == 0 ||
832  s->avctx->hwaccel ||
833  !s->cur_pic.f ||
834  s->cur_pic.field_picture ||
835  s->error_count == 3 * s->mb_width *
836  (s->avctx->skip_top + s->avctx->skip_bottom)) {
837  return;
838  };
839 
840  if (!s->cur_pic.motion_val[0] || !s->cur_pic.ref_index[0]) {
841  av_log(s->avctx, AV_LOG_ERROR, "MVs not available, ER not possible.\n");
842  return;
843  }
844 
845  if (s->avctx->debug & FF_DEBUG_ER) {
846  for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
847  for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
848  int status = s->error_status_table[mb_x + mb_y * s->mb_stride];
849 
850  av_log(s->avctx, AV_LOG_DEBUG, "%2X ", status);
851  }
852  av_log(s->avctx, AV_LOG_DEBUG, "\n");
853  }
854  }
855 
856  /* handle overlapping slices */
857  for (error_type = 1; error_type <= 3; error_type++) {
858  int end_ok = 0;
859 
860  for (i = s->mb_num - 1; i >= 0; i--) {
861  const int mb_xy = s->mb_index2xy[i];
862  int error = s->error_status_table[mb_xy];
863 
864  if (error & (1 << error_type))
865  end_ok = 1;
866  if (error & (8 << error_type))
867  end_ok = 1;
868 
869  if (!end_ok)
870  s->error_status_table[mb_xy] |= 1 << error_type;
871 
872  if (error & VP_START)
873  end_ok = 0;
874  }
875  }
876 
877  /* handle slices with partitions of different length */
878  if (s->partitioned_frame) {
879  int end_ok = 0;
880 
881  for (i = s->mb_num - 1; i >= 0; i--) {
882  const int mb_xy = s->mb_index2xy[i];
883  int error = s->error_status_table[mb_xy];
884 
885  if (error & ER_AC_END)
886  end_ok = 0;
887  if ((error & ER_MV_END) ||
888  (error & ER_DC_END) ||
889  (error & ER_AC_ERROR))
890  end_ok = 1;
891 
892  if (!end_ok)
893  s->error_status_table[mb_xy]|= ER_AC_ERROR;
894 
895  if (error & VP_START)
896  end_ok = 0;
897  }
898  }
899 
900  /* handle missing slices */
901  if (s->avctx->err_recognition & AV_EF_EXPLODE) {
902  int end_ok = 1;
903 
904  // FIXME + 100 hack
905  for (i = s->mb_num - 2; i >= s->mb_width + 100; i--) {
906  const int mb_xy = s->mb_index2xy[i];
907  int error1 = s->error_status_table[mb_xy];
908  int error2 = s->error_status_table[s->mb_index2xy[i + 1]];
909 
910  if (error1 & VP_START)
911  end_ok = 1;
912 
913  if (error2 == (VP_START | ER_MB_ERROR | ER_MB_END) &&
914  error1 != (VP_START | ER_MB_ERROR | ER_MB_END) &&
915  ((error1 & ER_AC_END) || (error1 & ER_DC_END) ||
916  (error1 & ER_MV_END))) {
917  // end & uninit
918  end_ok = 0;
919  }
920 
921  if (!end_ok)
922  s->error_status_table[mb_xy] |= ER_MB_ERROR;
923  }
924  }
925 
926  /* backward mark errors */
927  distance = 9999999;
928  for (error_type = 1; error_type <= 3; error_type++) {
929  for (i = s->mb_num - 1; i >= 0; i--) {
930  const int mb_xy = s->mb_index2xy[i];
931  int error = s->error_status_table[mb_xy];
932 
933  if (!s->mbskip_table[mb_xy]) // FIXME partition specific
934  distance++;
935  if (error & (1 << error_type))
936  distance = 0;
937 
938  if (s->partitioned_frame) {
939  if (distance < threshold_part[error_type - 1])
940  s->error_status_table[mb_xy] |= 1 << error_type;
941  } else {
942  if (distance < threshold)
943  s->error_status_table[mb_xy] |= 1 << error_type;
944  }
945 
946  if (error & VP_START)
947  distance = 9999999;
948  }
949  }
950 
951  /* forward mark errors */
952  error = 0;
953  for (i = 0; i < s->mb_num; i++) {
954  const int mb_xy = s->mb_index2xy[i];
955  int old_error = s->error_status_table[mb_xy];
956 
957  if (old_error & VP_START) {
958  error = old_error & ER_MB_ERROR;
959  } else {
960  error |= old_error & ER_MB_ERROR;
961  s->error_status_table[mb_xy] |= error;
962  }
963  }
964 
965  /* handle not partitioned case */
966  if (!s->partitioned_frame) {
967  for (i = 0; i < s->mb_num; i++) {
968  const int mb_xy = s->mb_index2xy[i];
969  error = s->error_status_table[mb_xy];
970  if (error & ER_MB_ERROR)
971  error |= ER_MB_ERROR;
972  s->error_status_table[mb_xy] = error;
973  }
974  }
975 
976  dc_error = ac_error = mv_error = 0;
977  for (i = 0; i < s->mb_num; i++) {
978  const int mb_xy = s->mb_index2xy[i];
979  error = s->error_status_table[mb_xy];
980  if (error & ER_DC_ERROR)
981  dc_error++;
982  if (error & ER_AC_ERROR)
983  ac_error++;
984  if (error & ER_MV_ERROR)
985  mv_error++;
986  }
987  av_log(s->avctx, AV_LOG_INFO, "concealing %d DC, %d AC, %d MV errors\n",
988  dc_error, ac_error, mv_error);
989 
990  is_intra_likely = is_intra_more_likely(s);
991 
992  /* set unknown mb-type to most likely */
993  for (i = 0; i < s->mb_num; i++) {
994  const int mb_xy = s->mb_index2xy[i];
995  error = s->error_status_table[mb_xy];
996  if (!((error & ER_DC_ERROR) && (error & ER_MV_ERROR)))
997  continue;
998 
999  if (is_intra_likely)
1000  s->cur_pic.mb_type[mb_xy] = MB_TYPE_INTRA4x4;
1001  else
1002  s->cur_pic.mb_type[mb_xy] = MB_TYPE_16x16 | MB_TYPE_L0;
1003  }
1004 
1005  // change inter to intra blocks if no reference frames are available
1006  if (!(s->last_pic.f && s->last_pic.f->data[0]) &&
1007  !(s->next_pic.f && s->next_pic.f->data[0]))
1008  for (i = 0; i < s->mb_num; i++) {
1009  const int mb_xy = s->mb_index2xy[i];
1010  if (!IS_INTRA(s->cur_pic.mb_type[mb_xy]))
1011  s->cur_pic.mb_type[mb_xy] = MB_TYPE_INTRA4x4;
1012  }
1013 
1014  /* handle inter blocks with damaged AC */
1015  for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1016  for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1017  const int mb_xy = mb_x + mb_y * s->mb_stride;
1018  const int mb_type = s->cur_pic.mb_type[mb_xy];
1019  const int dir = !(s->last_pic.f && s->last_pic.f->data[0]);
1020  const int mv_dir = dir ? MV_DIR_BACKWARD : MV_DIR_FORWARD;
1021  int mv_type;
1022 
1023  error = s->error_status_table[mb_xy];
1024 
1025  if (IS_INTRA(mb_type))
1026  continue; // intra
1027  if (error & ER_MV_ERROR)
1028  continue; // inter with damaged MV
1029  if (!(error & ER_AC_ERROR))
1030  continue; // undamaged inter
1031 
1032  if (IS_8X8(mb_type)) {
1033  int mb_index = mb_x * 2 + mb_y * 2 * s->b8_stride;
1034  int j;
1035  mv_type = MV_TYPE_8X8;
1036  for (j = 0; j < 4; j++) {
1037  s->mv[0][j][0] = s->cur_pic.motion_val[dir][mb_index + (j & 1) + (j >> 1) * s->b8_stride][0];
1038  s->mv[0][j][1] = s->cur_pic.motion_val[dir][mb_index + (j & 1) + (j >> 1) * s->b8_stride][1];
1039  }
1040  } else {
1041  mv_type = MV_TYPE_16X16;
1042  s->mv[0][0][0] = s->cur_pic.motion_val[dir][mb_x * 2 + mb_y * 2 * s->b8_stride][0];
1043  s->mv[0][0][1] = s->cur_pic.motion_val[dir][mb_x * 2 + mb_y * 2 * s->b8_stride][1];
1044  }
1045 
1046  s->decode_mb(s->opaque, 0 /* FIXME h264 partitioned slices need this set */,
1047  mv_dir, mv_type, &s->mv, mb_x, mb_y, 0, 0);
1048  }
1049  }
1050 
1051  /* guess MVs */
1052  if (s->cur_pic.f->pict_type == AV_PICTURE_TYPE_B) {
1053  for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1054  for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1055  int xy = mb_x * 2 + mb_y * 2 * s->b8_stride;
1056  const int mb_xy = mb_x + mb_y * s->mb_stride;
1057  const int mb_type = s->cur_pic.mb_type[mb_xy];
1058  int mv_dir = MV_DIR_FORWARD | MV_DIR_BACKWARD;
1059 
1060  error = s->error_status_table[mb_xy];
1061 
1062  if (IS_INTRA(mb_type))
1063  continue;
1064  if (!(error & ER_MV_ERROR))
1065  continue; // inter with undamaged MV
1066  if (!(error & ER_AC_ERROR))
1067  continue; // undamaged inter
1068 
1069  if (!(s->last_pic.f && s->last_pic.f->data[0]))
1070  mv_dir &= ~MV_DIR_FORWARD;
1071  if (!(s->next_pic.f && s->next_pic.f->data[0]))
1072  mv_dir &= ~MV_DIR_BACKWARD;
1073 
1074  if (s->pp_time) {
1075  int time_pp = s->pp_time;
1076  int time_pb = s->pb_time;
1077 
1078  ff_thread_await_progress(s->next_pic.tf, mb_y, 0);
1079 
1080  s->mv[0][0][0] = s->next_pic.motion_val[0][xy][0] * time_pb / time_pp;
1081  s->mv[0][0][1] = s->next_pic.motion_val[0][xy][1] * time_pb / time_pp;
1082  s->mv[1][0][0] = s->next_pic.motion_val[0][xy][0] * (time_pb - time_pp) / time_pp;
1083  s->mv[1][0][1] = s->next_pic.motion_val[0][xy][1] * (time_pb - time_pp) / time_pp;
1084  } else {
1085  s->mv[0][0][0] = 0;
1086  s->mv[0][0][1] = 0;
1087  s->mv[1][0][0] = 0;
1088  s->mv[1][0][1] = 0;
1089  }
1090 
1091  s->decode_mb(s->opaque, 0, mv_dir, MV_TYPE_16X16, &s->mv,
1092  mb_x, mb_y, 0, 0);
1093  }
1094  }
1095  } else
1096  guess_mv(s);
1097 
1098 #if FF_API_XVMC
1100  /* the filters below are not XvMC compatible, skip them */
1101  if (CONFIG_MPEG_XVMC_DECODER && s->avctx->xvmc_acceleration)
1102  goto ec_clean;
1104 #endif /* FF_API_XVMC */
1105  /* fill DC for inter blocks */
1106  for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1107  for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1108  int dc, dcu, dcv, y, n;
1109  int16_t *dc_ptr;
1110  uint8_t *dest_y, *dest_cb, *dest_cr;
1111  const int mb_xy = mb_x + mb_y * s->mb_stride;
1112  const int mb_type = s->cur_pic.mb_type[mb_xy];
1113 
1114  error = s->error_status_table[mb_xy];
1115 
1116  if (IS_INTRA(mb_type) && s->partitioned_frame)
1117  continue;
1118  // if (error & ER_MV_ERROR)
1119  // continue; // inter data damaged FIXME is this good?
1120 
1121  dest_y = s->cur_pic.f->data[0] + mb_x * 16 + mb_y * 16 * linesize[0];
1122  dest_cb = s->cur_pic.f->data[1] + mb_x * 8 + mb_y * 8 * linesize[1];
1123  dest_cr = s->cur_pic.f->data[2] + mb_x * 8 + mb_y * 8 * linesize[2];
1124 
1125  dc_ptr = &s->dc_val[0][mb_x * 2 + mb_y * 2 * s->b8_stride];
1126  for (n = 0; n < 4; n++) {
1127  dc = 0;
1128  for (y = 0; y < 8; y++) {
1129  int x;
1130  for (x = 0; x < 8; x++)
1131  dc += dest_y[x + (n & 1) * 8 +
1132  (y + (n >> 1) * 8) * linesize[0]];
1133  }
1134  dc_ptr[(n & 1) + (n >> 1) * s->b8_stride] = (dc + 4) >> 3;
1135  }
1136 
1137  dcu = dcv = 0;
1138  for (y = 0; y < 8; y++) {
1139  int x;
1140  for (x = 0; x < 8; x++) {
1141  dcu += dest_cb[x + y * linesize[1]];
1142  dcv += dest_cr[x + y * linesize[2]];
1143  }
1144  }
1145  s->dc_val[1][mb_x + mb_y * s->mb_stride] = (dcu + 4) >> 3;
1146  s->dc_val[2][mb_x + mb_y * s->mb_stride] = (dcv + 4) >> 3;
1147  }
1148  }
1149 
1150  /* guess DC for damaged blocks */
1151  guess_dc(s, s->dc_val[0], s->mb_width * 2, s->mb_height * 2, s->b8_stride, 1);
1152  guess_dc(s, s->dc_val[1], s->mb_width, s->mb_height, s->mb_stride, 0);
1153  guess_dc(s, s->dc_val[2], s->mb_width, s->mb_height, s->mb_stride, 0);
1154 
1155  /* filter luma DC */
1156  filter181(s->dc_val[0], s->mb_width * 2, s->mb_height * 2, s->b8_stride);
1157 
1158  /* render DC only intra */
1159  for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1160  for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1161  uint8_t *dest_y, *dest_cb, *dest_cr;
1162  const int mb_xy = mb_x + mb_y * s->mb_stride;
1163  const int mb_type = s->cur_pic.mb_type[mb_xy];
1164 
1165  error = s->error_status_table[mb_xy];
1166 
1167  if (IS_INTER(mb_type))
1168  continue;
1169  if (!(error & ER_AC_ERROR))
1170  continue; // undamaged
1171 
1172  dest_y = s->cur_pic.f->data[0] + mb_x * 16 + mb_y * 16 * linesize[0];
1173  dest_cb = s->cur_pic.f->data[1] + mb_x * 8 + mb_y * 8 * linesize[1];
1174  dest_cr = s->cur_pic.f->data[2] + mb_x * 8 + mb_y * 8 * linesize[2];
1175 
1176  put_dc(s, dest_y, dest_cb, dest_cr, mb_x, mb_y);
1177  }
1178  }
1179 
1181  /* filter horizontal block boundaries */
1182  h_block_filter(s, s->cur_pic.f->data[0], s->mb_width * 2,
1183  s->mb_height * 2, linesize[0], 1);
1184  h_block_filter(s, s->cur_pic.f->data[1], s->mb_width,
1185  s->mb_height, linesize[1], 0);
1186  h_block_filter(s, s->cur_pic.f->data[2], s->mb_width,
1187  s->mb_height, linesize[2], 0);
1188 
1189  /* filter vertical block boundaries */
1190  v_block_filter(s, s->cur_pic.f->data[0], s->mb_width * 2,
1191  s->mb_height * 2, linesize[0], 1);
1192  v_block_filter(s, s->cur_pic.f->data[1], s->mb_width,
1193  s->mb_height, linesize[1], 0);
1194  v_block_filter(s, s->cur_pic.f->data[2], s->mb_width,
1195  s->mb_height, linesize[2], 0);
1196  }
1197 
1198 ec_clean:
1199  /* clean a few tables */
1200  for (i = 0; i < s->mb_num; i++) {
1201  const int mb_xy = s->mb_index2xy[i];
1202  int error = s->error_status_table[mb_xy];
1203 
1204  if (s->cur_pic.f->pict_type != AV_PICTURE_TYPE_B &&
1205  (error & (ER_DC_ERROR | ER_MV_ERROR | ER_AC_ERROR))) {
1206  s->mbskip_table[mb_xy] = 0;
1207  }
1208  s->mbintra_table[mb_xy] = 1;
1209  }
1210 
1211  memset(&s->cur_pic, 0, sizeof(ERPicture));
1212  memset(&s->last_pic, 0, sizeof(ERPicture));
1213  memset(&s->next_pic, 0, sizeof(ERPicture));
1214 }
MECmpContext * mecc
#define MV_CHANGED
#define ER_MB_END
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.
void ff_er_frame_end(ERContext *s)
static void v_block_filter(ERContext *s, uint8_t *dst, int w, int h, int stride, int is_luma)
simple vertical deblocking filter used for error resilience
static void filter181(int16_t *data, int width, int height, int stride)
#define MB_TYPE_INTRA4x4
Definition: avcodec.h:775
#define VP_START
< current MB is the first after a resync marker
#define MAX_NEG_CROP
Definition: mathops.h:30
static void guess_mv(ERContext *s)
uint32_t * mb_type
ERPicture last_pic
mpegvideo header.
#define ER_MV_ERROR
void ff_thread_await_progress(ThreadFrame *f, int n, int field)
Wait for earlier decoding threads to finish reference pictures.
int stride
Definition: mace.c:144
#define MV_FROZEN
uint16_t pp_time
struct AVHWAccel * hwaccel
Hardware accelerator in use.
Definition: avcodec.h:2426
uint8_t
Multithreading support functions.
#define b
Definition: input.c:52
#define ER_MB_ERROR
ERPicture cur_pic
const char data[16]
Definition: mxf.c:70
#define ER_MV_END
static void guess_dc(ERContext *s, int16_t *dc, int w, int h, int stride, int is_luma)
guess the dc of blocks which do not have an undamaged dc
#define FF_DEBUG_ER
Definition: avcodec.h:2374
#define FF_EC_GUESS_MVS
Definition: avcodec.h:2348
#define cm
Definition: dvbsubdec.c:34
Libavcodec version macros.
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:123
void ff_er_add_slice(ERContext *s, int startx, int starty, int endx, int endy, int status)
Add a slice.
static const uint16_t mask[17]
Definition: lzw.c:38
int error_concealment
error concealment flags
Definition: avcodec.h:2347
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:144
void(* decode_mb)(void *opaque, int ref, int mv_dir, int mv_type, int(*mv)[2][4][2], int mb_x, int mb_y, int mb_intra, int mb_skipped)
void av_log(void *avcl, int level, const char *fmt,...)
Definition: log.c:168
ThreadFrame * tf
#define FFMAX(a, b)
Definition: common.h:55
uint8_t * mbintra_table
int * mb_index2xy
#define pass
Definition: fft_template.c:335
static float distance(float x, float y, int band)
uint8_t * error_status_table
common internal API header
#define ER_AC_ERROR
useful rectangle filling function
enum AVPictureType pict_type
Picture type of the frame.
Definition: frame.h:196
int err_recognition
Error recognition; may misdetect some more or less valid parts as errors.
Definition: avcodec.h:2400
uint8_t * er_temp_buffer
#define FFMIN(a, b)
Definition: common.h:57
#define FF_EC_DEBLOCK
Definition: avcodec.h:2349
#define ER_DC_END
uint16_t pb_time
#define FFABS(a)
Definition: common.h:52
#define AV_EF_EXPLODE
Definition: avcodec.h:2411
int skip_top
Number of macroblock rows at the top which are skipped.
Definition: avcodec.h:1637
int thread_count
thread count is used to decide how many independent tasks should be passed to execute() ...
Definition: avcodec.h:2534
if(ac->has_optimized_func)
#define MV_TYPE_16X16
1 vector for the whole mb
Definition: mpegvideo.h:388
NULL
Definition: eval.c:55
#define MV_DIR_BACKWARD
Definition: mpegvideo.h:385
static int width
Definition: utils.c:156
#define AV_LOG_INFO
Standard information.
Definition: log.h:134
Libavcodec external API header.
enum AVCodecID codec_id
Definition: avcodec.h:1061
ERPicture next_pic
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:153
int debug
debug
Definition: avcodec.h:2356
#define MB_TYPE_16x16
Definition: avcodec.h:778
#define IS_INTER(a)
Definition: mpegutils.h:75
#define ER_DC_ERROR
AVCodecContext * avctx
#define MV_DIR_FORWARD
Definition: mpegvideo.h:384
int8_t * ref_index[2]
int skip_bottom
Number of macroblock rows at the bottom which are skipped.
Definition: avcodec.h:1644
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:141
me_cmp_func sad[6]
Definition: me_cmp.h:41
uint8_t pi<< 24) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0f/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16, int16_t,(*(constint16_t *) pi >>8)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32, int32_t,(*(constint32_t *) pi >>24)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, float, av_clip_uint8(lrintf(*(constfloat *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, float, av_clip_int16(lrintf(*(constfloat *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, float, av_clipl_int32(llrintf(*(constfloat *) pi *(1U<< 31)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, double, av_clip_uint8(lrint(*(constdouble *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, double, av_clip_int16(lrint(*(constdouble *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, double, av_clipl_int32(llrint(*(constdouble *) pi *(1U<< 31))))#defineSET_CONV_FUNC_GROUP(ofmt, ifmt) staticvoidset_generic_function(AudioConvert *ac){}voidff_audio_convert_free(AudioConvert **ac){if(!*ac) return;ff_dither_free(&(*ac) ->dc);av_freep(ac);}AudioConvert *ff_audio_convert_alloc(AVAudioResampleContext *avr, enumAVSampleFormatout_fmt, enumAVSampleFormatin_fmt, intchannels, intsample_rate, intapply_map){AudioConvert *ac;intin_planar, out_planar;ac=av_mallocz(sizeof(*ac));if(!ac) returnNULL;ac->avr=avr;ac->out_fmt=out_fmt;ac->in_fmt=in_fmt;ac->channels=channels;ac->apply_map=apply_map;if(avr->dither_method!=AV_RESAMPLE_DITHER_NONE &&av_get_packed_sample_fmt(out_fmt)==AV_SAMPLE_FMT_S16 &&av_get_bytes_per_sample(in_fmt)>2){ac->dc=ff_dither_alloc(avr, out_fmt, in_fmt, channels, sample_rate, apply_map);if(!ac->dc){av_free(ac);returnNULL;}returnac;}in_planar=ff_sample_fmt_is_planar(in_fmt, channels);out_planar=ff_sample_fmt_is_planar(out_fmt, channels);if(in_planar==out_planar){ac->func_type=CONV_FUNC_TYPE_FLAT;ac->planes=in_planar?ac->channels:1;}elseif(in_planar) ac->func_type=CONV_FUNC_TYPE_INTERLEAVE;elseac->func_type=CONV_FUNC_TYPE_DEINTERLEAVE;set_generic_function(ac);if(ARCH_AARCH64) ff_audio_convert_init_aarch64(ac);if(ARCH_ARM) ff_audio_convert_init_arm(ac);if(ARCH_X86) ff_audio_convert_init_x86(ac);returnac;}intff_audio_convert(AudioConvert *ac, AudioData *out, AudioData *in){intuse_generic=1;intlen=in->nb_samples;intp;if(ac->dc){av_dlog(ac->avr,"%dsamples-audio_convert:%sto%s(dithered)\n", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt));returnff_convert_dither(ac-> dc
int height
Definition: gxfenc.c:72
int partitioned_frame
#define FF_DISABLE_DEPRECATION_WARNINGS
Definition: internal.h:76
#define MV_UNCHANGED
int16_t * dc_val[3]
Bi-dir predicted.
Definition: avutil.h:255
AVFrame * f
#define ff_crop_tab
static const uint8_t color[]
Definition: log.c:55
#define IS_INTRA(x, y)
static int is_intra_more_likely(ERContext *s)
int mv[2][4][2]
int16_t(*[2] motion_val)[2]
#define FF_ENABLE_DEPRECATION_WARNINGS
Definition: internal.h:77
#define IS_8X8(a)
Definition: mpegutils.h:85
void ff_er_frame_start(ERContext *s)
#define CONFIG_MPEG_XVMC_DECODER
Definition: config.h:523
static void h_block_filter(ERContext *s, uint8_t *dst, int w, int h, int stride, int is_luma)
simple horizontal deblocking filter used for error resilience
#define ER_AC_END
#define MV_TYPE_8X8
4 vectors (h263, mpeg4 4MV)
Definition: mpegvideo.h:389
uint8_t * mbskip_table
static void set_mv_strides(ERContext *s, int *mv_step, int *stride)
#define MB_TYPE_L0
Definition: avcodec.h:791