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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/atomic.h"
31 #include "libavutil/internal.h"
32 #include "avcodec.h"
33 #include "error_resilience.h"
34 #include "me_cmp.h"
35 #include "mpegutils.h"
36 #include "mpegvideo.h"
37 #include "rectangle.h"
38 #include "thread.h"
39 #include "version.h"
40 
41 /**
42  * @param stride the number of MVs to get to the next row
43  * @param mv_step the number of MVs per row or column in a macroblock
44  */
45 static void set_mv_strides(ERContext *s, int *mv_step, int *stride)
46 {
47  if (s->avctx->codec_id == AV_CODEC_ID_H264) {
49  *mv_step = 4;
50  *stride = s->mb_width * 4;
51  } else {
52  *mv_step = 2;
53  *stride = s->b8_stride;
54  }
55 }
56 
57 /**
58  * Replace the current MB with a flat dc-only version.
59  */
60 static void put_dc(ERContext *s, uint8_t *dest_y, uint8_t *dest_cb,
61  uint8_t *dest_cr, int mb_x, int mb_y)
62 {
63  int *linesize = s->cur_pic.f->linesize;
64  int dc, dcu, dcv, y, i;
65  for (i = 0; i < 4; i++) {
66  dc = s->dc_val[0][mb_x * 2 + (i & 1) + (mb_y * 2 + (i >> 1)) * s->b8_stride];
67  if (dc < 0)
68  dc = 0;
69  else if (dc > 2040)
70  dc = 2040;
71  for (y = 0; y < 8; y++) {
72  int x;
73  for (x = 0; x < 8; x++)
74  dest_y[x + (i & 1) * 8 + (y + (i >> 1) * 8) * linesize[0]] = dc / 8;
75  }
76  }
77  dcu = s->dc_val[1][mb_x + mb_y * s->mb_stride];
78  dcv = s->dc_val[2][mb_x + mb_y * s->mb_stride];
79  if (dcu < 0)
80  dcu = 0;
81  else if (dcu > 2040)
82  dcu = 2040;
83  if (dcv < 0)
84  dcv = 0;
85  else if (dcv > 2040)
86  dcv = 2040;
87 
88  if (dest_cr)
89  for (y = 0; y < 8; y++) {
90  int x;
91  for (x = 0; x < 8; x++) {
92  dest_cb[x + y * linesize[1]] = dcu / 8;
93  dest_cr[x + y * linesize[2]] = dcv / 8;
94  }
95  }
96 }
97 
98 static void filter181(int16_t *data, int width, int height, int stride)
99 {
100  int x, y;
101 
102  /* horizontal filter */
103  for (y = 1; y < height - 1; y++) {
104  int prev_dc = data[0 + y * stride];
105 
106  for (x = 1; x < width - 1; x++) {
107  int dc;
108  dc = -prev_dc +
109  data[x + y * stride] * 8 -
110  data[x + 1 + y * stride];
111  dc = (dc * 10923 + 32768) >> 16;
112  prev_dc = data[x + y * stride];
113  data[x + y * stride] = dc;
114  }
115  }
116 
117  /* vertical filter */
118  for (x = 1; x < width - 1; x++) {
119  int prev_dc = data[x];
120 
121  for (y = 1; y < height - 1; y++) {
122  int dc;
123 
124  dc = -prev_dc +
125  data[x + y * stride] * 8 -
126  data[x + (y + 1) * stride];
127  dc = (dc * 10923 + 32768) >> 16;
128  prev_dc = data[x + y * stride];
129  data[x + y * stride] = dc;
130  }
131  }
132 }
133 
134 /**
135  * guess the dc of blocks which do not have an undamaged dc
136  * @param w width in 8 pixel blocks
137  * @param h height in 8 pixel blocks
138  */
139 static void guess_dc(ERContext *s, int16_t *dc, int w,
140  int h, int stride, int is_luma)
141 {
142  int b_x, b_y;
143  int16_t (*col )[4] = av_malloc_array(stride, h*sizeof( int16_t)*4);
144  uint32_t (*dist)[4] = av_malloc_array(stride, h*sizeof(uint32_t)*4);
145 
146  if(!col || !dist) {
147  av_log(s->avctx, AV_LOG_ERROR, "guess_dc() is out of memory\n");
148  goto fail;
149  }
150 
151  for(b_y=0; b_y<h; b_y++){
152  int color= 1024;
153  int distance= -1;
154  for(b_x=0; b_x<w; b_x++){
155  int mb_index_j= (b_x>>is_luma) + (b_y>>is_luma)*s->mb_stride;
156  int error_j= s->error_status_table[mb_index_j];
157  int intra_j = IS_INTRA(s->cur_pic.mb_type[mb_index_j]);
158  if(intra_j==0 || !(error_j&ER_DC_ERROR)){
159  color= dc[b_x + b_y*stride];
160  distance= b_x;
161  }
162  col [b_x + b_y*stride][1]= color;
163  dist[b_x + b_y*stride][1]= distance >= 0 ? b_x-distance : 9999;
164  }
165  color= 1024;
166  distance= -1;
167  for(b_x=w-1; b_x>=0; b_x--){
168  int mb_index_j= (b_x>>is_luma) + (b_y>>is_luma)*s->mb_stride;
169  int error_j= s->error_status_table[mb_index_j];
170  int intra_j = IS_INTRA(s->cur_pic.mb_type[mb_index_j]);
171  if(intra_j==0 || !(error_j&ER_DC_ERROR)){
172  color= dc[b_x + b_y*stride];
173  distance= b_x;
174  }
175  col [b_x + b_y*stride][0]= color;
176  dist[b_x + b_y*stride][0]= distance >= 0 ? distance-b_x : 9999;
177  }
178  }
179  for(b_x=0; b_x<w; b_x++){
180  int color= 1024;
181  int distance= -1;
182  for(b_y=0; b_y<h; b_y++){
183  int mb_index_j= (b_x>>is_luma) + (b_y>>is_luma)*s->mb_stride;
184  int error_j= s->error_status_table[mb_index_j];
185  int intra_j = IS_INTRA(s->cur_pic.mb_type[mb_index_j]);
186  if(intra_j==0 || !(error_j&ER_DC_ERROR)){
187  color= dc[b_x + b_y*stride];
188  distance= b_y;
189  }
190  col [b_x + b_y*stride][3]= color;
191  dist[b_x + b_y*stride][3]= distance >= 0 ? b_y-distance : 9999;
192  }
193  color= 1024;
194  distance= -1;
195  for(b_y=h-1; b_y>=0; b_y--){
196  int mb_index_j= (b_x>>is_luma) + (b_y>>is_luma)*s->mb_stride;
197  int error_j= s->error_status_table[mb_index_j];
198  int intra_j = IS_INTRA(s->cur_pic.mb_type[mb_index_j]);
199  if(intra_j==0 || !(error_j&ER_DC_ERROR)){
200  color= dc[b_x + b_y*stride];
201  distance= b_y;
202  }
203  col [b_x + b_y*stride][2]= color;
204  dist[b_x + b_y*stride][2]= distance >= 0 ? distance-b_y : 9999;
205  }
206  }
207 
208  for (b_y = 0; b_y < h; b_y++) {
209  for (b_x = 0; b_x < w; b_x++) {
210  int mb_index, error, j;
211  int64_t guess, weight_sum;
212  mb_index = (b_x >> is_luma) + (b_y >> is_luma) * s->mb_stride;
213  error = s->error_status_table[mb_index];
214 
215  if (IS_INTER(s->cur_pic.mb_type[mb_index]))
216  continue; // inter
217  if (!(error & ER_DC_ERROR))
218  continue; // dc-ok
219 
220  weight_sum = 0;
221  guess = 0;
222  for (j = 0; j < 4; j++) {
223  int64_t weight = 256 * 256 * 256 * 16 / FFMAX(dist[b_x + b_y*stride][j], 1);
224  guess += weight*(int64_t)col[b_x + b_y*stride][j];
225  weight_sum += weight;
226  }
227  guess = (guess + weight_sum / 2) / weight_sum;
228  dc[b_x + b_y * stride] = guess;
229  }
230  }
231 
232 fail:
233  av_freep(&col);
234  av_freep(&dist);
235 }
236 
237 /**
238  * simple horizontal deblocking filter used for error resilience
239  * @param w width in 8 pixel blocks
240  * @param h height in 8 pixel blocks
241  */
242 static void h_block_filter(ERContext *s, uint8_t *dst, int w,
243  int h, int stride, int is_luma)
244 {
245  int b_x, b_y, mvx_stride, mvy_stride;
246  const uint8_t *cm = ff_crop_tab + MAX_NEG_CROP;
247  set_mv_strides(s, &mvx_stride, &mvy_stride);
248  mvx_stride >>= is_luma;
249  mvy_stride *= mvx_stride;
250 
251  for (b_y = 0; b_y < h; b_y++) {
252  for (b_x = 0; b_x < w - 1; b_x++) {
253  int y;
254  int left_status = s->error_status_table[( b_x >> is_luma) + (b_y >> is_luma) * s->mb_stride];
255  int right_status = s->error_status_table[((b_x + 1) >> is_luma) + (b_y >> is_luma) * s->mb_stride];
256  int left_intra = IS_INTRA(s->cur_pic.mb_type[( b_x >> is_luma) + (b_y >> is_luma) * s->mb_stride]);
257  int right_intra = IS_INTRA(s->cur_pic.mb_type[((b_x + 1) >> is_luma) + (b_y >> is_luma) * s->mb_stride]);
258  int left_damage = left_status & ER_MB_ERROR;
259  int right_damage = right_status & ER_MB_ERROR;
260  int offset = b_x * 8 + b_y * stride * 8;
261  int16_t *left_mv = s->cur_pic.motion_val[0][mvy_stride * b_y + mvx_stride * b_x];
262  int16_t *right_mv = s->cur_pic.motion_val[0][mvy_stride * b_y + mvx_stride * (b_x + 1)];
263  if (!(left_damage || right_damage))
264  continue; // both undamaged
265  if ((!left_intra) && (!right_intra) &&
266  FFABS(left_mv[0] - right_mv[0]) +
267  FFABS(left_mv[1] + right_mv[1]) < 2)
268  continue;
269 
270  for (y = 0; y < 8; y++) {
271  int a, b, c, d;
272 
273  a = dst[offset + 7 + y * stride] - dst[offset + 6 + y * stride];
274  b = dst[offset + 8 + y * stride] - dst[offset + 7 + y * stride];
275  c = dst[offset + 9 + y * stride] - dst[offset + 8 + y * stride];
276 
277  d = FFABS(b) - ((FFABS(a) + FFABS(c) + 1) >> 1);
278  d = FFMAX(d, 0);
279  if (b < 0)
280  d = -d;
281 
282  if (d == 0)
283  continue;
284 
285  if (!(left_damage && right_damage))
286  d = d * 16 / 9;
287 
288  if (left_damage) {
289  dst[offset + 7 + y * stride] = cm[dst[offset + 7 + y * stride] + ((d * 7) >> 4)];
290  dst[offset + 6 + y * stride] = cm[dst[offset + 6 + y * stride] + ((d * 5) >> 4)];
291  dst[offset + 5 + y * stride] = cm[dst[offset + 5 + y * stride] + ((d * 3) >> 4)];
292  dst[offset + 4 + y * stride] = cm[dst[offset + 4 + y * stride] + ((d * 1) >> 4)];
293  }
294  if (right_damage) {
295  dst[offset + 8 + y * stride] = cm[dst[offset + 8 + y * stride] - ((d * 7) >> 4)];
296  dst[offset + 9 + y * stride] = cm[dst[offset + 9 + y * stride] - ((d * 5) >> 4)];
297  dst[offset + 10+ y * stride] = cm[dst[offset + 10 + y * stride] - ((d * 3) >> 4)];
298  dst[offset + 11+ y * stride] = cm[dst[offset + 11 + y * stride] - ((d * 1) >> 4)];
299  }
300  }
301  }
302  }
303 }
304 
305 /**
306  * simple vertical deblocking filter used for error resilience
307  * @param w width in 8 pixel blocks
308  * @param h height in 8 pixel blocks
309  */
310 static void v_block_filter(ERContext *s, uint8_t *dst, int w, int h,
311  int stride, int is_luma)
312 {
313  int b_x, b_y, mvx_stride, mvy_stride;
314  const uint8_t *cm = ff_crop_tab + MAX_NEG_CROP;
315  set_mv_strides(s, &mvx_stride, &mvy_stride);
316  mvx_stride >>= is_luma;
317  mvy_stride *= mvx_stride;
318 
319  for (b_y = 0; b_y < h - 1; b_y++) {
320  for (b_x = 0; b_x < w; b_x++) {
321  int x;
322  int top_status = s->error_status_table[(b_x >> is_luma) + (b_y >> is_luma) * s->mb_stride];
323  int bottom_status = s->error_status_table[(b_x >> is_luma) + ((b_y + 1) >> is_luma) * s->mb_stride];
324  int top_intra = IS_INTRA(s->cur_pic.mb_type[(b_x >> is_luma) + ( b_y >> is_luma) * s->mb_stride]);
325  int bottom_intra = IS_INTRA(s->cur_pic.mb_type[(b_x >> is_luma) + ((b_y + 1) >> is_luma) * s->mb_stride]);
326  int top_damage = top_status & ER_MB_ERROR;
327  int bottom_damage = bottom_status & ER_MB_ERROR;
328  int offset = b_x * 8 + b_y * stride * 8;
329 
330  int16_t *top_mv = s->cur_pic.motion_val[0][mvy_stride * b_y + mvx_stride * b_x];
331  int16_t *bottom_mv = s->cur_pic.motion_val[0][mvy_stride * (b_y + 1) + mvx_stride * b_x];
332 
333  if (!(top_damage || bottom_damage))
334  continue; // both undamaged
335 
336  if ((!top_intra) && (!bottom_intra) &&
337  FFABS(top_mv[0] - bottom_mv[0]) +
338  FFABS(top_mv[1] + bottom_mv[1]) < 2)
339  continue;
340 
341  for (x = 0; x < 8; x++) {
342  int a, b, c, d;
343 
344  a = dst[offset + x + 7 * stride] - dst[offset + x + 6 * stride];
345  b = dst[offset + x + 8 * stride] - dst[offset + x + 7 * stride];
346  c = dst[offset + x + 9 * stride] - dst[offset + x + 8 * stride];
347 
348  d = FFABS(b) - ((FFABS(a) + FFABS(c) + 1) >> 1);
349  d = FFMAX(d, 0);
350  if (b < 0)
351  d = -d;
352 
353  if (d == 0)
354  continue;
355 
356  if (!(top_damage && bottom_damage))
357  d = d * 16 / 9;
358 
359  if (top_damage) {
360  dst[offset + x + 7 * stride] = cm[dst[offset + x + 7 * stride] + ((d * 7) >> 4)];
361  dst[offset + x + 6 * stride] = cm[dst[offset + x + 6 * stride] + ((d * 5) >> 4)];
362  dst[offset + x + 5 * stride] = cm[dst[offset + x + 5 * stride] + ((d * 3) >> 4)];
363  dst[offset + x + 4 * stride] = cm[dst[offset + x + 4 * stride] + ((d * 1) >> 4)];
364  }
365  if (bottom_damage) {
366  dst[offset + x + 8 * stride] = cm[dst[offset + x + 8 * stride] - ((d * 7) >> 4)];
367  dst[offset + x + 9 * stride] = cm[dst[offset + x + 9 * stride] - ((d * 5) >> 4)];
368  dst[offset + x + 10 * stride] = cm[dst[offset + x + 10 * stride] - ((d * 3) >> 4)];
369  dst[offset + x + 11 * stride] = cm[dst[offset + x + 11 * stride] - ((d * 1) >> 4)];
370  }
371  }
372  }
373  }
374 }
375 
376 static void guess_mv(ERContext *s)
377 {
378  uint8_t *fixed = s->er_temp_buffer;
379 #define MV_FROZEN 3
380 #define MV_CHANGED 2
381 #define MV_UNCHANGED 1
382  const int mb_stride = s->mb_stride;
383  const int mb_width = s->mb_width;
384  int mb_height = s->mb_height;
385  int i, depth, num_avail;
386  int mb_x, mb_y, mot_step, mot_stride;
387 
388  if (s->last_pic.f && s->last_pic.f->data[0])
389  mb_height = FFMIN(mb_height, (s->last_pic.f->height+15)>>4);
390  if (s->next_pic.f && s->next_pic.f->data[0])
391  mb_height = FFMIN(mb_height, (s->next_pic.f->height+15)>>4);
392 
393  set_mv_strides(s, &mot_step, &mot_stride);
394 
395  num_avail = 0;
396  if (s->last_pic.motion_val[0])
397  ff_thread_await_progress(s->last_pic.tf, mb_height-1, 0);
398  for (i = 0; i < mb_width * mb_height; i++) {
399  const int mb_xy = s->mb_index2xy[i];
400  int f = 0;
401  int error = s->error_status_table[mb_xy];
402 
403  if (IS_INTRA(s->cur_pic.mb_type[mb_xy]))
404  f = MV_FROZEN; // intra // FIXME check
405  if (!(error & ER_MV_ERROR))
406  f = MV_FROZEN; // inter with undamaged MV
407 
408  fixed[mb_xy] = f;
409  if (f == MV_FROZEN)
410  num_avail++;
411  else if(s->last_pic.f->data[0] && s->last_pic.motion_val[0]){
412  const int mb_y= mb_xy / s->mb_stride;
413  const int mb_x= mb_xy % s->mb_stride;
414  const int mot_index= (mb_x + mb_y*mot_stride) * mot_step;
415  s->cur_pic.motion_val[0][mot_index][0]= s->last_pic.motion_val[0][mot_index][0];
416  s->cur_pic.motion_val[0][mot_index][1]= s->last_pic.motion_val[0][mot_index][1];
417  s->cur_pic.ref_index[0][4*mb_xy] = s->last_pic.ref_index[0][4*mb_xy];
418  }
419  }
420 
421  if ((!(s->avctx->error_concealment&FF_EC_GUESS_MVS)) ||
422  num_avail <= mb_width / 2) {
423  for (mb_y = 0; mb_y < mb_height; mb_y++) {
424  for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
425  const int mb_xy = mb_x + mb_y * s->mb_stride;
426  int mv_dir = (s->last_pic.f && s->last_pic.f->data[0]) ? MV_DIR_FORWARD : MV_DIR_BACKWARD;
427 
428  if (IS_INTRA(s->cur_pic.mb_type[mb_xy]))
429  continue;
430  if (!(s->error_status_table[mb_xy] & ER_MV_ERROR))
431  continue;
432 
433  s->mv[0][0][0] = 0;
434  s->mv[0][0][1] = 0;
435  s->decode_mb(s->opaque, 0, mv_dir, MV_TYPE_16X16, &s->mv,
436  mb_x, mb_y, 0, 0);
437  }
438  }
439  return;
440  }
441 
442  for (depth = 0; ; depth++) {
443  int changed, pass, none_left;
444 
445  none_left = 1;
446  changed = 1;
447  for (pass = 0; (changed || pass < 2) && pass < 10; pass++) {
448  int mb_x, mb_y;
449  int score_sum = 0;
450 
451  changed = 0;
452  for (mb_y = 0; mb_y < mb_height; mb_y++) {
453  for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
454  const int mb_xy = mb_x + mb_y * s->mb_stride;
455  int mv_predictor[8][2] = { { 0 } };
456  int ref[8] = { 0 };
457  int pred_count = 0;
458  int j;
459  int best_score = 256 * 256 * 256 * 64;
460  int best_pred = 0;
461  const int mot_index = (mb_x + mb_y * mot_stride) * mot_step;
462  int prev_x = 0, prev_y = 0, prev_ref = 0;
463 
464  if ((mb_x ^ mb_y ^ pass) & 1)
465  continue;
466 
467  if (fixed[mb_xy] == MV_FROZEN)
468  continue;
469  av_assert1(!IS_INTRA(s->cur_pic.mb_type[mb_xy]));
470  av_assert1(s->last_pic.f && s->last_pic.f->data[0]);
471 
472  j = 0;
473  if (mb_x > 0 && fixed[mb_xy - 1] == MV_FROZEN)
474  j = 1;
475  if (mb_x + 1 < mb_width && fixed[mb_xy + 1] == MV_FROZEN)
476  j = 1;
477  if (mb_y > 0 && fixed[mb_xy - mb_stride] == MV_FROZEN)
478  j = 1;
479  if (mb_y + 1 < mb_height && fixed[mb_xy + mb_stride] == MV_FROZEN)
480  j = 1;
481  if (j == 0)
482  continue;
483 
484  j = 0;
485  if (mb_x > 0 && fixed[mb_xy - 1 ] == MV_CHANGED)
486  j = 1;
487  if (mb_x + 1 < mb_width && fixed[mb_xy + 1 ] == MV_CHANGED)
488  j = 1;
489  if (mb_y > 0 && fixed[mb_xy - mb_stride] == MV_CHANGED)
490  j = 1;
491  if (mb_y + 1 < mb_height && fixed[mb_xy + mb_stride] == MV_CHANGED)
492  j = 1;
493  if (j == 0 && pass > 1)
494  continue;
495 
496  none_left = 0;
497 
498  if (mb_x > 0 && fixed[mb_xy - 1]) {
499  mv_predictor[pred_count][0] =
500  s->cur_pic.motion_val[0][mot_index - mot_step][0];
501  mv_predictor[pred_count][1] =
502  s->cur_pic.motion_val[0][mot_index - mot_step][1];
503  ref[pred_count] =
504  s->cur_pic.ref_index[0][4 * (mb_xy - 1)];
505  pred_count++;
506  }
507  if (mb_x + 1 < mb_width && fixed[mb_xy + 1]) {
508  mv_predictor[pred_count][0] =
509  s->cur_pic.motion_val[0][mot_index + mot_step][0];
510  mv_predictor[pred_count][1] =
511  s->cur_pic.motion_val[0][mot_index + mot_step][1];
512  ref[pred_count] =
513  s->cur_pic.ref_index[0][4 * (mb_xy + 1)];
514  pred_count++;
515  }
516  if (mb_y > 0 && fixed[mb_xy - mb_stride]) {
517  mv_predictor[pred_count][0] =
518  s->cur_pic.motion_val[0][mot_index - mot_stride * mot_step][0];
519  mv_predictor[pred_count][1] =
520  s->cur_pic.motion_val[0][mot_index - mot_stride * mot_step][1];
521  ref[pred_count] =
522  s->cur_pic.ref_index[0][4 * (mb_xy - s->mb_stride)];
523  pred_count++;
524  }
525  if (mb_y + 1<mb_height && fixed[mb_xy + mb_stride]) {
526  mv_predictor[pred_count][0] =
527  s->cur_pic.motion_val[0][mot_index + mot_stride * mot_step][0];
528  mv_predictor[pred_count][1] =
529  s->cur_pic.motion_val[0][mot_index + mot_stride * mot_step][1];
530  ref[pred_count] =
531  s->cur_pic.ref_index[0][4 * (mb_xy + s->mb_stride)];
532  pred_count++;
533  }
534  if (pred_count == 0)
535  continue;
536 
537  if (pred_count > 1) {
538  int sum_x = 0, sum_y = 0, sum_r = 0;
539  int max_x, max_y, min_x, min_y, max_r, min_r;
540 
541  for (j = 0; j < pred_count; j++) {
542  sum_x += mv_predictor[j][0];
543  sum_y += mv_predictor[j][1];
544  sum_r += ref[j];
545  if (j && ref[j] != ref[j - 1])
546  goto skip_mean_and_median;
547  }
548 
549  /* mean */
550  mv_predictor[pred_count][0] = sum_x / j;
551  mv_predictor[pred_count][1] = sum_y / j;
552  ref[pred_count] = sum_r / j;
553 
554  /* median */
555  if (pred_count >= 3) {
556  min_y = min_x = min_r = 99999;
557  max_y = max_x = max_r = -99999;
558  } else {
559  min_x = min_y = max_x = max_y = min_r = max_r = 0;
560  }
561  for (j = 0; j < pred_count; j++) {
562  max_x = FFMAX(max_x, mv_predictor[j][0]);
563  max_y = FFMAX(max_y, mv_predictor[j][1]);
564  max_r = FFMAX(max_r, ref[j]);
565  min_x = FFMIN(min_x, mv_predictor[j][0]);
566  min_y = FFMIN(min_y, mv_predictor[j][1]);
567  min_r = FFMIN(min_r, ref[j]);
568  }
569  mv_predictor[pred_count + 1][0] = sum_x - max_x - min_x;
570  mv_predictor[pred_count + 1][1] = sum_y - max_y - min_y;
571  ref[pred_count + 1] = sum_r - max_r - min_r;
572 
573  if (pred_count == 4) {
574  mv_predictor[pred_count + 1][0] /= 2;
575  mv_predictor[pred_count + 1][1] /= 2;
576  ref[pred_count + 1] /= 2;
577  }
578  pred_count += 2;
579  }
580 
581 skip_mean_and_median:
582  /* zero MV */
583  pred_count++;
584 
585  prev_x = s->cur_pic.motion_val[0][mot_index][0];
586  prev_y = s->cur_pic.motion_val[0][mot_index][1];
587  prev_ref = s->cur_pic.ref_index[0][4 * mb_xy];
588 
589  /* last MV */
590  mv_predictor[pred_count][0] = prev_x;
591  mv_predictor[pred_count][1] = prev_y;
592  ref[pred_count] = prev_ref;
593  pred_count++;
594 
595 skip_last_mv:
596 
597  for (j = 0; j < pred_count; j++) {
598  int *linesize = s->cur_pic.f->linesize;
599  int score = 0;
600  uint8_t *src = s->cur_pic.f->data[0] +
601  mb_x * 16 + mb_y * 16 * linesize[0];
602 
603  s->cur_pic.motion_val[0][mot_index][0] =
604  s->mv[0][0][0] = mv_predictor[j][0];
605  s->cur_pic.motion_val[0][mot_index][1] =
606  s->mv[0][0][1] = mv_predictor[j][1];
607 
608  // predictor intra or otherwise not available
609  if (ref[j] < 0)
610  continue;
611 
612  s->decode_mb(s->opaque, ref[j], MV_DIR_FORWARD,
613  MV_TYPE_16X16, &s->mv, mb_x, mb_y, 0, 0);
614 
615  if (mb_x > 0 && fixed[mb_xy - 1]) {
616  int k;
617  for (k = 0; k < 16; k++)
618  score += FFABS(src[k * linesize[0] - 1] -
619  src[k * linesize[0]]);
620  }
621  if (mb_x + 1 < mb_width && fixed[mb_xy + 1]) {
622  int k;
623  for (k = 0; k < 16; k++)
624  score += FFABS(src[k * linesize[0] + 15] -
625  src[k * linesize[0] + 16]);
626  }
627  if (mb_y > 0 && fixed[mb_xy - mb_stride]) {
628  int k;
629  for (k = 0; k < 16; k++)
630  score += FFABS(src[k - linesize[0]] - src[k]);
631  }
632  if (mb_y + 1 < mb_height && fixed[mb_xy + mb_stride]) {
633  int k;
634  for (k = 0; k < 16; k++)
635  score += FFABS(src[k + linesize[0] * 15] -
636  src[k + linesize[0] * 16]);
637  }
638 
639  if (score <= best_score) { // <= will favor the last MV
640  best_score = score;
641  best_pred = j;
642  }
643  }
644  score_sum += best_score;
645  s->mv[0][0][0] = mv_predictor[best_pred][0];
646  s->mv[0][0][1] = mv_predictor[best_pred][1];
647 
648  for (i = 0; i < mot_step; i++)
649  for (j = 0; j < mot_step; j++) {
650  s->cur_pic.motion_val[0][mot_index + i + j * mot_stride][0] = s->mv[0][0][0];
651  s->cur_pic.motion_val[0][mot_index + i + j * mot_stride][1] = s->mv[0][0][1];
652  }
653 
654  s->decode_mb(s->opaque, ref[best_pred], MV_DIR_FORWARD,
655  MV_TYPE_16X16, &s->mv, mb_x, mb_y, 0, 0);
656 
657 
658  if (s->mv[0][0][0] != prev_x || s->mv[0][0][1] != prev_y) {
659  fixed[mb_xy] = MV_CHANGED;
660  changed++;
661  } else
662  fixed[mb_xy] = MV_UNCHANGED;
663  }
664  }
665  }
666 
667  if (none_left)
668  return;
669 
670  for (i = 0; i < mb_width * mb_height; i++) {
671  int mb_xy = s->mb_index2xy[i];
672  if (fixed[mb_xy])
673  fixed[mb_xy] = MV_FROZEN;
674  }
675  }
676 }
677 
679 {
680  int is_intra_likely, i, j, undamaged_count, skip_amount, mb_x, mb_y;
681 
682  if (!s->last_pic.f || !s->last_pic.f->data[0])
683  return 1; // no previous frame available -> use spatial prediction
684 
686  return 0;
687 
688  undamaged_count = 0;
689  for (i = 0; i < s->mb_num; i++) {
690  const int mb_xy = s->mb_index2xy[i];
691  const int error = s->error_status_table[mb_xy];
692  if (!((error & ER_DC_ERROR) && (error & ER_MV_ERROR)))
693  undamaged_count++;
694  }
695 
696  if (undamaged_count < 5)
697  return 0; // almost all MBs damaged -> use temporal prediction
698 
699  // prevent dsp.sad() check, that requires access to the image
700  if (CONFIG_XVMC &&
701  s->avctx->hwaccel && s->avctx->hwaccel->decode_mb &&
703  return 1;
704 
705  skip_amount = FFMAX(undamaged_count / 50, 1); // check only up to 50 MBs
706  is_intra_likely = 0;
707 
708  j = 0;
709  for (mb_y = 0; mb_y < s->mb_height - 1; mb_y++) {
710  for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
711  int error;
712  const int mb_xy = mb_x + mb_y * s->mb_stride;
713 
714  error = s->error_status_table[mb_xy];
715  if ((error & ER_DC_ERROR) && (error & ER_MV_ERROR))
716  continue; // skip damaged
717 
718  j++;
719  // skip a few to speed things up
720  if ((j % skip_amount) != 0)
721  continue;
722 
723  if (s->cur_pic.f->pict_type == AV_PICTURE_TYPE_I) {
724  int *linesize = s->cur_pic.f->linesize;
725  uint8_t *mb_ptr = s->cur_pic.f->data[0] +
726  mb_x * 16 + mb_y * 16 * linesize[0];
727  uint8_t *last_mb_ptr = s->last_pic.f->data[0] +
728  mb_x * 16 + mb_y * 16 * linesize[0];
729 
730  if (s->avctx->codec_id == AV_CODEC_ID_H264) {
731  // FIXME
732  } else {
733  ff_thread_await_progress(s->last_pic.tf, mb_y, 0);
734  }
735  is_intra_likely += s->mecc.sad[0](NULL, last_mb_ptr, mb_ptr,
736  linesize[0], 16);
737  // FIXME need await_progress() here
738  is_intra_likely -= s->mecc.sad[0](NULL, last_mb_ptr,
739  last_mb_ptr + linesize[0] * 16,
740  linesize[0], 16);
741  } else {
742  if (IS_INTRA(s->cur_pic.mb_type[mb_xy]))
743  is_intra_likely++;
744  else
745  is_intra_likely--;
746  }
747  }
748  }
749 // av_log(NULL, AV_LOG_ERROR, "is_intra_likely: %d type:%d\n", is_intra_likely, s->pict_type);
750  return is_intra_likely > 0;
751 }
752 
754 {
755  if (!s->avctx->error_concealment)
756  return;
757 
758  if (!s->mecc_inited) {
759  ff_me_cmp_init(&s->mecc, s->avctx);
760  s->mecc_inited = 1;
761  }
762 
764  s->mb_stride * s->mb_height * sizeof(uint8_t));
765  s->error_count = 3 * s->mb_num;
766  s->error_occurred = 0;
767 }
768 
770 {
771  if(s->avctx->hwaccel && s->avctx->hwaccel->decode_slice ||
774 #endif
775  !s->cur_pic.f ||
777  )
778  return 0;
779  return 1;
780 }
781 
782 /**
783  * Add a slice.
784  * @param endx x component of the last macroblock, can be -1
785  * for the last of the previous line
786  * @param status the status at the end (ER_MV_END, ER_AC_ERROR, ...), it is
787  * assumed that no earlier end or error of the same type occurred
788  */
789 void ff_er_add_slice(ERContext *s, int startx, int starty,
790  int endx, int endy, int status)
791 {
792  const int start_i = av_clip(startx + starty * s->mb_width, 0, s->mb_num - 1);
793  const int end_i = av_clip(endx + endy * s->mb_width, 0, s->mb_num);
794  const int start_xy = s->mb_index2xy[start_i];
795  const int end_xy = s->mb_index2xy[end_i];
796  int mask = -1;
797 
798  if (s->avctx->hwaccel && s->avctx->hwaccel->decode_slice)
799  return;
800 
801  if (start_i > end_i || start_xy > end_xy) {
803  "internal error, slice end before start\n");
804  return;
805  }
806 
807  if (!s->avctx->error_concealment)
808  return;
809 
810  mask &= ~VP_START;
811  if (status & (ER_AC_ERROR | ER_AC_END)) {
812  mask &= ~(ER_AC_ERROR | ER_AC_END);
813  avpriv_atomic_int_add_and_fetch(&s->error_count, start_i - end_i - 1);
814  }
815  if (status & (ER_DC_ERROR | ER_DC_END)) {
816  mask &= ~(ER_DC_ERROR | ER_DC_END);
817  avpriv_atomic_int_add_and_fetch(&s->error_count, start_i - end_i - 1);
818  }
819  if (status & (ER_MV_ERROR | ER_MV_END)) {
820  mask &= ~(ER_MV_ERROR | ER_MV_END);
821  avpriv_atomic_int_add_and_fetch(&s->error_count, start_i - end_i - 1);
822  }
823 
824  if (status & ER_MB_ERROR) {
825  s->error_occurred = 1;
826  avpriv_atomic_int_set(&s->error_count, INT_MAX);
827  }
828 
829  if (mask == ~0x7F) {
830  memset(&s->error_status_table[start_xy], 0,
831  (end_xy - start_xy) * sizeof(uint8_t));
832  } else {
833  int i;
834  for (i = start_xy; i < end_xy; i++)
835  s->error_status_table[i] &= mask;
836  }
837 
838  if (end_i == s->mb_num)
839  avpriv_atomic_int_set(&s->error_count, INT_MAX);
840  else {
841  s->error_status_table[end_xy] &= mask;
842  s->error_status_table[end_xy] |= status;
843  }
844 
845  s->error_status_table[start_xy] |= VP_START;
846 
847  if (start_xy > 0 && !(s->avctx->active_thread_type & FF_THREAD_SLICE) &&
848  er_supported(s) && s->avctx->skip_top * s->mb_width < start_i) {
849  int prev_status = s->error_status_table[s->mb_index2xy[start_i - 1]];
850 
851  prev_status &= ~ VP_START;
852  if (prev_status != (ER_MV_END | ER_DC_END | ER_AC_END)) {
853  s->error_occurred = 1;
854  avpriv_atomic_int_set(&s->error_count, INT_MAX);
855  }
856  }
857 }
858 
860 {
861  int *linesize = NULL;
862  int i, mb_x, mb_y, error, error_type, dc_error, mv_error, ac_error;
863  int distance;
864  int threshold_part[4] = { 100, 100, 100 };
865  int threshold = 50;
866  int is_intra_likely;
867  int size = s->b8_stride * 2 * s->mb_height;
868 
869  /* We do not support ER of field pictures yet,
870  * though it should not crash if enabled. */
871  if (!s->avctx->error_concealment || s->error_count == 0 ||
872  s->avctx->lowres ||
873  !er_supported(s) ||
874  s->error_count == 3 * s->mb_width *
875  (s->avctx->skip_top + s->avctx->skip_bottom)) {
876  return;
877  }
878  linesize = s->cur_pic.f->linesize;
879  for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
880  int status = s->error_status_table[mb_x + (s->mb_height - 1) * s->mb_stride];
881  if (status != 0x7F)
882  break;
883  }
884 
885  if ( mb_x == s->mb_width
887  && (FFALIGN(s->avctx->height, 16)&16)
888  && s->error_count == 3 * s->mb_width * (s->avctx->skip_top + s->avctx->skip_bottom + 1)
889  ) {
890  av_log(s->avctx, AV_LOG_DEBUG, "ignoring last missing slice\n");
891  return;
892  }
893 
894  if (s->last_pic.f) {
895  if (s->last_pic.f->width != s->cur_pic.f->width ||
896  s->last_pic.f->height != s->cur_pic.f->height ||
897  s->last_pic.f->format != s->cur_pic.f->format) {
898  av_log(s->avctx, AV_LOG_WARNING, "Cannot use previous picture in error concealment\n");
899  memset(&s->last_pic, 0, sizeof(s->last_pic));
900  }
901  }
902  if (s->next_pic.f) {
903  if (s->next_pic.f->width != s->cur_pic.f->width ||
904  s->next_pic.f->height != s->cur_pic.f->height ||
905  s->next_pic.f->format != s->cur_pic.f->format) {
906  av_log(s->avctx, AV_LOG_WARNING, "Cannot use next picture in error concealment\n");
907  memset(&s->next_pic, 0, sizeof(s->next_pic));
908  }
909  }
910 
911  if (!s->cur_pic.motion_val[0] || !s->cur_pic.ref_index[0]) {
912  av_log(s->avctx, AV_LOG_ERROR, "Warning MVs not available\n");
913 
914  for (i = 0; i < 2; i++) {
915  s->ref_index_buf[i] = av_buffer_allocz(s->mb_stride * s->mb_height * 4 * sizeof(uint8_t));
916  s->motion_val_buf[i] = av_buffer_allocz((size + 4) * 2 * sizeof(uint16_t));
917  if (!s->ref_index_buf[i] || !s->motion_val_buf[i])
918  break;
919  s->cur_pic.ref_index[i] = s->ref_index_buf[i]->data;
920  s->cur_pic.motion_val[i] = (int16_t (*)[2])s->motion_val_buf[i]->data + 4;
921  }
922  if (i < 2) {
923  for (i = 0; i < 2; i++) {
926  s->cur_pic.ref_index[i] = NULL;
927  s->cur_pic.motion_val[i] = NULL;
928  }
929  return;
930  }
931  }
932 
933  if (s->avctx->debug & FF_DEBUG_ER) {
934  for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
935  for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
936  int status = s->error_status_table[mb_x + mb_y * s->mb_stride];
937 
938  av_log(s->avctx, AV_LOG_DEBUG, "%2X ", status);
939  }
940  av_log(s->avctx, AV_LOG_DEBUG, "\n");
941  }
942  }
943 
944 #if 1
945  /* handle overlapping slices */
946  for (error_type = 1; error_type <= 3; error_type++) {
947  int end_ok = 0;
948 
949  for (i = s->mb_num - 1; i >= 0; i--) {
950  const int mb_xy = s->mb_index2xy[i];
951  int error = s->error_status_table[mb_xy];
952 
953  if (error & (1 << error_type))
954  end_ok = 1;
955  if (error & (8 << error_type))
956  end_ok = 1;
957 
958  if (!end_ok)
959  s->error_status_table[mb_xy] |= 1 << error_type;
960 
961  if (error & VP_START)
962  end_ok = 0;
963  }
964  }
965 #endif
966 #if 1
967  /* handle slices with partitions of different length */
968  if (s->partitioned_frame) {
969  int end_ok = 0;
970 
971  for (i = s->mb_num - 1; i >= 0; i--) {
972  const int mb_xy = s->mb_index2xy[i];
973  int error = s->error_status_table[mb_xy];
974 
975  if (error & ER_AC_END)
976  end_ok = 0;
977  if ((error & ER_MV_END) ||
978  (error & ER_DC_END) ||
979  (error & ER_AC_ERROR))
980  end_ok = 1;
981 
982  if (!end_ok)
983  s->error_status_table[mb_xy]|= ER_AC_ERROR;
984 
985  if (error & VP_START)
986  end_ok = 0;
987  }
988  }
989 #endif
990  /* handle missing slices */
991  if (s->avctx->err_recognition & AV_EF_EXPLODE) {
992  int end_ok = 1;
993 
994  // FIXME + 100 hack
995  for (i = s->mb_num - 2; i >= s->mb_width + 100; i--) {
996  const int mb_xy = s->mb_index2xy[i];
997  int error1 = s->error_status_table[mb_xy];
998  int error2 = s->error_status_table[s->mb_index2xy[i + 1]];
999 
1000  if (error1 & VP_START)
1001  end_ok = 1;
1002 
1003  if (error2 == (VP_START | ER_MB_ERROR | ER_MB_END) &&
1004  error1 != (VP_START | ER_MB_ERROR | ER_MB_END) &&
1005  ((error1 & ER_AC_END) || (error1 & ER_DC_END) ||
1006  (error1 & ER_MV_END))) {
1007  // end & uninit
1008  end_ok = 0;
1009  }
1010 
1011  if (!end_ok)
1012  s->error_status_table[mb_xy] |= ER_MB_ERROR;
1013  }
1014  }
1015 
1016 #if 1
1017  /* backward mark errors */
1018  distance = 9999999;
1019  for (error_type = 1; error_type <= 3; error_type++) {
1020  for (i = s->mb_num - 1; i >= 0; i--) {
1021  const int mb_xy = s->mb_index2xy[i];
1022  int error = s->error_status_table[mb_xy];
1023 
1024  if (!s->mbskip_table || !s->mbskip_table[mb_xy]) // FIXME partition specific
1025  distance++;
1026  if (error & (1 << error_type))
1027  distance = 0;
1028 
1029  if (s->partitioned_frame) {
1030  if (distance < threshold_part[error_type - 1])
1031  s->error_status_table[mb_xy] |= 1 << error_type;
1032  } else {
1033  if (distance < threshold)
1034  s->error_status_table[mb_xy] |= 1 << error_type;
1035  }
1036 
1037  if (error & VP_START)
1038  distance = 9999999;
1039  }
1040  }
1041 #endif
1042 
1043  /* forward mark errors */
1044  error = 0;
1045  for (i = 0; i < s->mb_num; i++) {
1046  const int mb_xy = s->mb_index2xy[i];
1047  int old_error = s->error_status_table[mb_xy];
1048 
1049  if (old_error & VP_START) {
1050  error = old_error & ER_MB_ERROR;
1051  } else {
1052  error |= old_error & ER_MB_ERROR;
1053  s->error_status_table[mb_xy] |= error;
1054  }
1055  }
1056 #if 1
1057  /* handle not partitioned case */
1058  if (!s->partitioned_frame) {
1059  for (i = 0; i < s->mb_num; i++) {
1060  const int mb_xy = s->mb_index2xy[i];
1061  int error = s->error_status_table[mb_xy];
1062  if (error & ER_MB_ERROR)
1063  error |= ER_MB_ERROR;
1064  s->error_status_table[mb_xy] = error;
1065  }
1066  }
1067 #endif
1068 
1069  dc_error = ac_error = mv_error = 0;
1070  for (i = 0; i < s->mb_num; i++) {
1071  const int mb_xy = s->mb_index2xy[i];
1072  int error = s->error_status_table[mb_xy];
1073  if (error & ER_DC_ERROR)
1074  dc_error++;
1075  if (error & ER_AC_ERROR)
1076  ac_error++;
1077  if (error & ER_MV_ERROR)
1078  mv_error++;
1079  }
1080  av_log(s->avctx, AV_LOG_INFO, "concealing %d DC, %d AC, %d MV errors in %c frame\n",
1081  dc_error, ac_error, mv_error, av_get_picture_type_char(s->cur_pic.f->pict_type));
1082 
1083  is_intra_likely = is_intra_more_likely(s);
1084 
1085  /* set unknown mb-type to most likely */
1086  for (i = 0; i < s->mb_num; i++) {
1087  const int mb_xy = s->mb_index2xy[i];
1088  int error = s->error_status_table[mb_xy];
1089  if (!((error & ER_DC_ERROR) && (error & ER_MV_ERROR)))
1090  continue;
1091 
1092  if (is_intra_likely)
1093  s->cur_pic.mb_type[mb_xy] = MB_TYPE_INTRA4x4;
1094  else
1095  s->cur_pic.mb_type[mb_xy] = MB_TYPE_16x16 | MB_TYPE_L0;
1096  }
1097 
1098  // change inter to intra blocks if no reference frames are available
1099  if (!(s->last_pic.f && s->last_pic.f->data[0]) &&
1100  !(s->next_pic.f && s->next_pic.f->data[0]))
1101  for (i = 0; i < s->mb_num; i++) {
1102  const int mb_xy = s->mb_index2xy[i];
1103  if (!IS_INTRA(s->cur_pic.mb_type[mb_xy]))
1104  s->cur_pic.mb_type[mb_xy] = MB_TYPE_INTRA4x4;
1105  }
1106 
1107  /* handle inter blocks with damaged AC */
1108  for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1109  for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1110  const int mb_xy = mb_x + mb_y * s->mb_stride;
1111  const int mb_type = s->cur_pic.mb_type[mb_xy];
1112  const int dir = !(s->last_pic.f && s->last_pic.f->data[0]);
1113  const int mv_dir = dir ? MV_DIR_BACKWARD : MV_DIR_FORWARD;
1114  int mv_type;
1115 
1116  int error = s->error_status_table[mb_xy];
1117 
1118  if (IS_INTRA(mb_type))
1119  continue; // intra
1120  if (error & ER_MV_ERROR)
1121  continue; // inter with damaged MV
1122  if (!(error & ER_AC_ERROR))
1123  continue; // undamaged inter
1124 
1125  if (IS_8X8(mb_type)) {
1126  int mb_index = mb_x * 2 + mb_y * 2 * s->b8_stride;
1127  int j;
1128  mv_type = MV_TYPE_8X8;
1129  for (j = 0; j < 4; j++) {
1130  s->mv[0][j][0] = s->cur_pic.motion_val[dir][mb_index + (j & 1) + (j >> 1) * s->b8_stride][0];
1131  s->mv[0][j][1] = s->cur_pic.motion_val[dir][mb_index + (j & 1) + (j >> 1) * s->b8_stride][1];
1132  }
1133  } else {
1134  mv_type = MV_TYPE_16X16;
1135  s->mv[0][0][0] = s->cur_pic.motion_val[dir][mb_x * 2 + mb_y * 2 * s->b8_stride][0];
1136  s->mv[0][0][1] = s->cur_pic.motion_val[dir][mb_x * 2 + mb_y * 2 * s->b8_stride][1];
1137  }
1138 
1139  s->decode_mb(s->opaque, 0 /* FIXME h264 partitioned slices need this set */,
1140  mv_dir, mv_type, &s->mv, mb_x, mb_y, 0, 0);
1141  }
1142  }
1143 
1144  /* guess MVs */
1145  if (s->cur_pic.f->pict_type == AV_PICTURE_TYPE_B) {
1146  for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1147  for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1148  int xy = mb_x * 2 + mb_y * 2 * s->b8_stride;
1149  const int mb_xy = mb_x + mb_y * s->mb_stride;
1150  const int mb_type = s->cur_pic.mb_type[mb_xy];
1151  int mv_dir = MV_DIR_FORWARD | MV_DIR_BACKWARD;
1152 
1153  int error = s->error_status_table[mb_xy];
1154 
1155  if (IS_INTRA(mb_type))
1156  continue;
1157  if (!(error & ER_MV_ERROR))
1158  continue; // inter with undamaged MV
1159  if (!(error & ER_AC_ERROR))
1160  continue; // undamaged inter
1161 
1162  if (!(s->last_pic.f && s->last_pic.f->data[0]))
1163  mv_dir &= ~MV_DIR_FORWARD;
1164  if (!(s->next_pic.f && s->next_pic.f->data[0]))
1165  mv_dir &= ~MV_DIR_BACKWARD;
1166 
1167  if (s->pp_time) {
1168  int time_pp = s->pp_time;
1169  int time_pb = s->pb_time;
1170 
1172  ff_thread_await_progress(s->next_pic.tf, mb_y, 0);
1173 
1174  s->mv[0][0][0] = s->next_pic.motion_val[0][xy][0] * time_pb / time_pp;
1175  s->mv[0][0][1] = s->next_pic.motion_val[0][xy][1] * time_pb / time_pp;
1176  s->mv[1][0][0] = s->next_pic.motion_val[0][xy][0] * (time_pb - time_pp) / time_pp;
1177  s->mv[1][0][1] = s->next_pic.motion_val[0][xy][1] * (time_pb - time_pp) / time_pp;
1178  } else {
1179  s->mv[0][0][0] = 0;
1180  s->mv[0][0][1] = 0;
1181  s->mv[1][0][0] = 0;
1182  s->mv[1][0][1] = 0;
1183  }
1184 
1185  s->decode_mb(s->opaque, 0, mv_dir, MV_TYPE_16X16, &s->mv,
1186  mb_x, mb_y, 0, 0);
1187  }
1188  }
1189  } else
1190  guess_mv(s);
1191 
1192  /* the filters below manipulate raw image, skip them */
1193  if (CONFIG_XVMC && s->avctx->hwaccel && s->avctx->hwaccel->decode_mb)
1194  goto ec_clean;
1195  /* fill DC for inter blocks */
1196  for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1197  for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1198  int dc, dcu, dcv, y, n;
1199  int16_t *dc_ptr;
1200  uint8_t *dest_y, *dest_cb, *dest_cr;
1201  const int mb_xy = mb_x + mb_y * s->mb_stride;
1202  const int mb_type = s->cur_pic.mb_type[mb_xy];
1203 
1204  // error = s->error_status_table[mb_xy];
1205 
1206  if (IS_INTRA(mb_type) && s->partitioned_frame)
1207  continue;
1208  // if (error & ER_MV_ERROR)
1209  // continue; // inter data damaged FIXME is this good?
1210 
1211  dest_y = s->cur_pic.f->data[0] + mb_x * 16 + mb_y * 16 * linesize[0];
1212  dest_cb = s->cur_pic.f->data[1] + mb_x * 8 + mb_y * 8 * linesize[1];
1213  dest_cr = s->cur_pic.f->data[2] + mb_x * 8 + mb_y * 8 * linesize[2];
1214 
1215  dc_ptr = &s->dc_val[0][mb_x * 2 + mb_y * 2 * s->b8_stride];
1216  for (n = 0; n < 4; n++) {
1217  dc = 0;
1218  for (y = 0; y < 8; y++) {
1219  int x;
1220  for (x = 0; x < 8; x++)
1221  dc += dest_y[x + (n & 1) * 8 +
1222  (y + (n >> 1) * 8) * linesize[0]];
1223  }
1224  dc_ptr[(n & 1) + (n >> 1) * s->b8_stride] = (dc + 4) >> 3;
1225  }
1226 
1227  if (!s->cur_pic.f->data[2])
1228  continue;
1229 
1230  dcu = dcv = 0;
1231  for (y = 0; y < 8; y++) {
1232  int x;
1233  for (x = 0; x < 8; x++) {
1234  dcu += dest_cb[x + y * linesize[1]];
1235  dcv += dest_cr[x + y * linesize[2]];
1236  }
1237  }
1238  s->dc_val[1][mb_x + mb_y * s->mb_stride] = (dcu + 4) >> 3;
1239  s->dc_val[2][mb_x + mb_y * s->mb_stride] = (dcv + 4) >> 3;
1240  }
1241  }
1242 #if 1
1243  /* guess DC for damaged blocks */
1244  guess_dc(s, s->dc_val[0], s->mb_width*2, s->mb_height*2, s->b8_stride, 1);
1245  guess_dc(s, s->dc_val[1], s->mb_width , s->mb_height , s->mb_stride, 0);
1246  guess_dc(s, s->dc_val[2], s->mb_width , s->mb_height , s->mb_stride, 0);
1247 #endif
1248 
1249  /* filter luma DC */
1250  filter181(s->dc_val[0], s->mb_width * 2, s->mb_height * 2, s->b8_stride);
1251 
1252 #if 1
1253  /* render DC only intra */
1254  for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1255  for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1256  uint8_t *dest_y, *dest_cb, *dest_cr;
1257  const int mb_xy = mb_x + mb_y * s->mb_stride;
1258  const int mb_type = s->cur_pic.mb_type[mb_xy];
1259 
1260  int error = s->error_status_table[mb_xy];
1261 
1262  if (IS_INTER(mb_type))
1263  continue;
1264  if (!(error & ER_AC_ERROR))
1265  continue; // undamaged
1266 
1267  dest_y = s->cur_pic.f->data[0] + mb_x * 16 + mb_y * 16 * linesize[0];
1268  dest_cb = s->cur_pic.f->data[1] + mb_x * 8 + mb_y * 8 * linesize[1];
1269  dest_cr = s->cur_pic.f->data[2] + mb_x * 8 + mb_y * 8 * linesize[2];
1270  if (!s->cur_pic.f->data[2])
1271  dest_cb = dest_cr = NULL;
1272 
1273  put_dc(s, dest_y, dest_cb, dest_cr, mb_x, mb_y);
1274  }
1275  }
1276 #endif
1277 
1279  /* filter horizontal block boundaries */
1280  h_block_filter(s, s->cur_pic.f->data[0], s->mb_width * 2,
1281  s->mb_height * 2, linesize[0], 1);
1282 
1283  /* filter vertical block boundaries */
1284  v_block_filter(s, s->cur_pic.f->data[0], s->mb_width * 2,
1285  s->mb_height * 2, linesize[0], 1);
1286 
1287  if (s->cur_pic.f->data[2]) {
1288  h_block_filter(s, s->cur_pic.f->data[1], s->mb_width,
1289  s->mb_height, linesize[1], 0);
1290  h_block_filter(s, s->cur_pic.f->data[2], s->mb_width,
1291  s->mb_height, linesize[2], 0);
1292  v_block_filter(s, s->cur_pic.f->data[1], s->mb_width,
1293  s->mb_height, linesize[1], 0);
1294  v_block_filter(s, s->cur_pic.f->data[2], s->mb_width,
1295  s->mb_height, linesize[2], 0);
1296  }
1297  }
1298 
1299 ec_clean:
1300  /* clean a few tables */
1301  for (i = 0; i < s->mb_num; i++) {
1302  const int mb_xy = s->mb_index2xy[i];
1303  int error = s->error_status_table[mb_xy];
1304 
1305  if (s->mbskip_table && s->cur_pic.f->pict_type != AV_PICTURE_TYPE_B &&
1306  (error & (ER_DC_ERROR | ER_MV_ERROR | ER_AC_ERROR))) {
1307  s->mbskip_table[mb_xy] = 0;
1308  }
1309  if (s->mbintra_table)
1310  s->mbintra_table[mb_xy] = 1;
1311  }
1312 
1313  for (i = 0; i < 2; i++) {
1316  s->cur_pic.ref_index[i] = NULL;
1317  s->cur_pic.motion_val[i] = NULL;
1318  }
1319 
1320  memset(&s->cur_pic, 0, sizeof(ERPicture));
1321  memset(&s->last_pic, 0, sizeof(ERPicture));
1322  memset(&s->next_pic, 0, sizeof(ERPicture));
1323 }
av_cold void ff_me_cmp_init(MECmpContext *c, AVCodecContext *avctx)
Definition: me_cmp.c:936
#define NULL
Definition: coverity.c:32
const struct AVCodec * codec
Definition: avcodec.h:1651
#define avpriv_atomic_int_add_and_fetch
Definition: atomic_gcc.h:50
const char * s
Definition: avisynth_c.h:631
void av_buffer_unref(AVBufferRef **buf)
Free a given reference and automatically free the buffer if there are no more references to it...
Definition: buffer.c:124
ptrdiff_t const GLvoid * data
Definition: opengl_enc.c:101
#define MV_CHANGED
AVBufferRef * motion_val_buf[2]
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
#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:1237
const char * b
Definition: vf_curves.c:109
#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.
#define MV_FROZEN
uint16_t pp_time
struct AVHWAccel * hwaccel
Hardware accelerator in use.
Definition: avcodec.h:2961
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
uint8_t
AVBufferRef * ref_index_buf[2]
static const uint32_t color[16+AV_CLASS_CATEGORY_NB]
Definition: log.c:94
Multithreading support functions.
#define ER_MB_ERROR
#define FF_API_CAP_VDPAU
Definition: version.h:73
#define avpriv_atomic_int_set
Definition: atomic_gcc.h:39
ERPicture cur_pic
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:91
#define AV_CODEC_CAP_HWACCEL_VDPAU
Codec can export data for HW decoding (VDPAU).
Definition: avcodec.h:989
#define ER_MV_END
void(* decode_mb)(struct MpegEncContext *s)
Called for every Macroblock in a slice.
Definition: avcodec.h:3763
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:2899
int lowres
low resolution decoding, 1-> 1/2 size, 2->1/4 size
Definition: avcodec.h:3052
#define FF_EC_GUESS_MVS
Definition: avcodec.h:2872
ptrdiff_t size
Definition: opengl_enc.c:101
#define FFALIGN(x, a)
Definition: macros.h:48
#define av_log(a,...)
#define cm
Definition: dvbsubdec.c:36
static int ref[MAX_W *MAX_W]
Libavcodec version macros.
int width
width and height of the video frame
Definition: frame.h:232
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
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 active_thread_type
Which multithreading methods are in use by the codec.
Definition: avcodec.h:3091
int error_concealment
error concealment flags
Definition: avcodec.h:2871
int capabilities
Codec capabilities.
Definition: avcodec.h:3554
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
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)
ThreadFrame * tf
static const uint8_t offset[127][2]
Definition: vf_spp.c:92
#define FFMAX(a, b)
Definition: common.h:94
#define fail()
Definition: checkasm.h:81
uint8_t * mbintra_table
int * mb_index2xy
int depth
Definition: v4l.c:62
#define pass
Definition: fft_template.c:532
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:254
int err_recognition
Error recognition; may misdetect some more or less valid parts as errors.
Definition: avcodec.h:2929
#define av_assert1(cond)
assert() equivalent, that does not lie in speed critical code.
Definition: avassert.h:53
uint8_t * er_temp_buffer
#define FFMIN(a, b)
Definition: common.h:96
#define FF_EC_DEBLOCK
Definition: avcodec.h:2873
#define width
#define ER_DC_END
uint16_t pb_time
#define FFABS(a)
Absolute value, Note, INT_MIN / INT64_MIN result in undefined behavior as they are not representable ...
Definition: common.h:72
#define FF_THREAD_SLICE
Decode more than one part of a single frame at once.
Definition: avcodec.h:3084
#define AV_EF_EXPLODE
abort decoding on minor error detection
Definition: avcodec.h:2940
int n
Definition: avisynth_c.h:547
int skip_top
Number of macroblock rows at the top which are skipped.
Definition: avcodec.h:2259
#define src
Definition: vp9dsp.c:530
preferred ID for MPEG-1/2 video decoding
Definition: avcodec.h:194
int format
format of the frame, -1 if unknown or unset Values correspond to enum AVPixelFormat for video frames...
Definition: frame.h:244
#define MV_TYPE_16X16
1 vector for the whole mb
Definition: mpegvideo.h:266
#define MV_DIR_BACKWARD
Definition: mpegvideo.h:263
#define AV_LOG_INFO
Standard information.
Definition: log.h:187
Libavcodec external API header.
enum AVCodecID codec_id
Definition: avcodec.h:1659
ERPicture next_pic
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:211
int debug
debug
Definition: avcodec.h:2881
uint8_t * data
The data buffer.
Definition: buffer.h:89
AVBufferRef * av_buffer_allocz(int size)
Same as av_buffer_alloc(), except the returned buffer will be initialized to zero.
Definition: buffer.c:82
#define MB_TYPE_16x16
Definition: avcodec.h:1240
MECmpContext mecc
#define IS_INTER(a)
Definition: mpegutils.h:81
#define ER_DC_ERROR
AVCodecContext * avctx
static int weight(int i, int blen, int offset)
Definition: diracdec.c:1429
#define MV_DIR_FORWARD
Definition: mpegvideo.h:262
int8_t * ref_index[2]
int skip_bottom
Number of macroblock rows at the bottom which are skipped.
Definition: avcodec.h:2266
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:194
me_cmp_func sad[6]
Definition: me_cmp.h:56
#define FF_EC_FAVOR_INTER
Definition: avcodec.h:2874
volatile int error_count
GLint GLenum GLboolean GLsizei stride
Definition: opengl_enc.c:105
int partitioned_frame
if(ret< 0)
Definition: vf_mcdeint.c:282
#define MV_UNCHANGED
static double c[64]
int16_t * dc_val[3]
Bi-dir predicted.
Definition: avutil.h:268
AVFrame * f
#define ff_crop_tab
#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 IS_8X8(a)
Definition: mpegutils.h:91
static int er_supported(ERContext *s)
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_log(ac->avr, AV_LOG_TRACE,"%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
void ff_er_frame_start(ERContext *s)
int height
Definition: frame.h:232
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 av_freep(p)
#define ER_AC_END
#define av_malloc_array(a, b)
#define stride
#define height
int(* decode_slice)(AVCodecContext *avctx, const uint8_t *buf, uint32_t buf_size)
Callback for each slice.
Definition: avcodec.h:3732
#define MV_TYPE_8X8
4 vectors (h263, mpeg4 4MV)
Definition: mpegvideo.h:267
uint8_t * mbskip_table
static void set_mv_strides(ERContext *s, int *mv_step, int *stride)
#define MB_TYPE_L0
Definition: avcodec.h:1253