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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/internal.h"
31 #include "avcodec.h"
32 #include "error_resilience.h"
33 #include "me_cmp.h"
34 #include "mpegutils.h"
35 #include "mpegvideo.h"
36 #include "rectangle.h"
37 #include "thread.h"
38 #include "version.h"
39 
40 /**
41  * @param stride the number of MVs to get to the next row
42  * @param mv_step the number of MVs per row or column in a macroblock
43  */
44 static void set_mv_strides(ERContext *s, ptrdiff_t *mv_step, ptrdiff_t *stride)
45 {
46  if (s->avctx->codec_id == AV_CODEC_ID_H264) {
47  av_assert0(s->quarter_sample);
48  *mv_step = 4;
49  *stride = s->mb_width * 4;
50  } else {
51  *mv_step = 2;
52  *stride = s->b8_stride;
53  }
54 }
55 
56 /**
57  * Replace the current MB with a flat dc-only version.
58  */
59 static void put_dc(ERContext *s, uint8_t *dest_y, uint8_t *dest_cb,
60  uint8_t *dest_cr, int mb_x, int mb_y)
61 {
62  int *linesize = s->cur_pic.f->linesize;
63  int dc, dcu, dcv, y, i;
64  for (i = 0; i < 4; i++) {
65  dc = s->dc_val[0][mb_x * 2 + (i & 1) + (mb_y * 2 + (i >> 1)) * s->b8_stride];
66  if (dc < 0)
67  dc = 0;
68  else if (dc > 2040)
69  dc = 2040;
70  for (y = 0; y < 8; y++) {
71  int x;
72  for (x = 0; x < 8; x++)
73  dest_y[x + (i & 1) * 8 + (y + (i >> 1) * 8) * linesize[0]] = dc / 8;
74  }
75  }
76  dcu = s->dc_val[1][mb_x + mb_y * s->mb_stride];
77  dcv = s->dc_val[2][mb_x + mb_y * s->mb_stride];
78  if (dcu < 0)
79  dcu = 0;
80  else if (dcu > 2040)
81  dcu = 2040;
82  if (dcv < 0)
83  dcv = 0;
84  else if (dcv > 2040)
85  dcv = 2040;
86 
87  if (dest_cr)
88  for (y = 0; y < 8; y++) {
89  int x;
90  for (x = 0; x < 8; x++) {
91  dest_cb[x + y * linesize[1]] = dcu / 8;
92  dest_cr[x + y * linesize[2]] = dcv / 8;
93  }
94  }
95 }
96 
97 static void filter181(int16_t *data, int width, int height, ptrdiff_t stride)
98 {
99  int x, y;
100 
101  /* horizontal filter */
102  for (y = 1; y < height - 1; y++) {
103  int prev_dc = data[0 + y * stride];
104 
105  for (x = 1; x < width - 1; x++) {
106  int dc;
107  dc = -prev_dc +
108  data[x + y * stride] * 8 -
109  data[x + 1 + y * stride];
110  dc = (av_clip(dc, INT_MIN/10923, INT_MAX/10923 - 32768) * 10923 + 32768) >> 16;
111  prev_dc = data[x + y * stride];
112  data[x + y * stride] = dc;
113  }
114  }
115 
116  /* vertical filter */
117  for (x = 1; x < width - 1; x++) {
118  int prev_dc = data[x];
119 
120  for (y = 1; y < height - 1; y++) {
121  int dc;
122 
123  dc = -prev_dc +
124  data[x + y * stride] * 8 -
125  data[x + (y + 1) * stride];
126  dc = (av_clip(dc, INT_MIN/10923, INT_MAX/10923 - 32768) * 10923 + 32768) >> 16;
127  prev_dc = data[x + y * stride];
128  data[x + y * stride] = dc;
129  }
130  }
131 }
132 
133 /**
134  * guess the dc of blocks which do not have an undamaged dc
135  * @param w width in 8 pixel blocks
136  * @param h height in 8 pixel blocks
137  */
138 static void guess_dc(ERContext *s, int16_t *dc, int w,
139  int h, ptrdiff_t stride, int is_luma)
140 {
141  int b_x, b_y;
142  int16_t (*col )[4] = av_malloc_array(stride, h*sizeof( int16_t)*4);
143  uint32_t (*dist)[4] = av_malloc_array(stride, h*sizeof(uint32_t)*4);
144 
145  if(!col || !dist) {
146  av_log(s->avctx, AV_LOG_ERROR, "guess_dc() is out of memory\n");
147  goto fail;
148  }
149 
150  for(b_y=0; b_y<h; b_y++){
151  int color= 1024;
152  int distance= -1;
153  for(b_x=0; b_x<w; b_x++){
154  int mb_index_j= (b_x>>is_luma) + (b_y>>is_luma)*s->mb_stride;
155  int error_j= s->error_status_table[mb_index_j];
156  int intra_j = IS_INTRA(s->cur_pic.mb_type[mb_index_j]);
157  if(intra_j==0 || !(error_j&ER_DC_ERROR)){
158  color= dc[b_x + b_y*stride];
159  distance= b_x;
160  }
161  col [b_x + b_y*stride][1]= color;
162  dist[b_x + b_y*stride][1]= distance >= 0 ? b_x-distance : 9999;
163  }
164  color= 1024;
165  distance= -1;
166  for(b_x=w-1; b_x>=0; b_x--){
167  int mb_index_j= (b_x>>is_luma) + (b_y>>is_luma)*s->mb_stride;
168  int error_j= s->error_status_table[mb_index_j];
169  int intra_j = IS_INTRA(s->cur_pic.mb_type[mb_index_j]);
170  if(intra_j==0 || !(error_j&ER_DC_ERROR)){
171  color= dc[b_x + b_y*stride];
172  distance= b_x;
173  }
174  col [b_x + b_y*stride][0]= color;
175  dist[b_x + b_y*stride][0]= distance >= 0 ? distance-b_x : 9999;
176  }
177  }
178  for(b_x=0; b_x<w; b_x++){
179  int color= 1024;
180  int distance= -1;
181  for(b_y=0; b_y<h; b_y++){
182  int mb_index_j= (b_x>>is_luma) + (b_y>>is_luma)*s->mb_stride;
183  int error_j= s->error_status_table[mb_index_j];
184  int intra_j = IS_INTRA(s->cur_pic.mb_type[mb_index_j]);
185  if(intra_j==0 || !(error_j&ER_DC_ERROR)){
186  color= dc[b_x + b_y*stride];
187  distance= b_y;
188  }
189  col [b_x + b_y*stride][3]= color;
190  dist[b_x + b_y*stride][3]= distance >= 0 ? b_y-distance : 9999;
191  }
192  color= 1024;
193  distance= -1;
194  for(b_y=h-1; b_y>=0; b_y--){
195  int mb_index_j= (b_x>>is_luma) + (b_y>>is_luma)*s->mb_stride;
196  int error_j= s->error_status_table[mb_index_j];
197  int intra_j = IS_INTRA(s->cur_pic.mb_type[mb_index_j]);
198  if(intra_j==0 || !(error_j&ER_DC_ERROR)){
199  color= dc[b_x + b_y*stride];
200  distance= b_y;
201  }
202  col [b_x + b_y*stride][2]= color;
203  dist[b_x + b_y*stride][2]= distance >= 0 ? distance-b_y : 9999;
204  }
205  }
206 
207  for (b_y = 0; b_y < h; b_y++) {
208  for (b_x = 0; b_x < w; b_x++) {
209  int mb_index, error, j;
210  int64_t guess, weight_sum;
211  mb_index = (b_x >> is_luma) + (b_y >> is_luma) * s->mb_stride;
212  error = s->error_status_table[mb_index];
213 
214  if (IS_INTER(s->cur_pic.mb_type[mb_index]))
215  continue; // inter
216  if (!(error & ER_DC_ERROR))
217  continue; // dc-ok
218 
219  weight_sum = 0;
220  guess = 0;
221  for (j = 0; j < 4; j++) {
222  int64_t weight = 256 * 256 * 256 * 16 / FFMAX(dist[b_x + b_y*stride][j], 1);
223  guess += weight*(int64_t)col[b_x + b_y*stride][j];
224  weight_sum += weight;
225  }
226  guess = (guess + weight_sum / 2) / weight_sum;
227  dc[b_x + b_y * stride] = guess;
228  }
229  }
230 
231 fail:
232  av_freep(&col);
233  av_freep(&dist);
234 }
235 
236 /**
237  * simple horizontal deblocking filter used for error resilience
238  * @param w width in 8 pixel blocks
239  * @param h height in 8 pixel blocks
240  */
241 static void h_block_filter(ERContext *s, uint8_t *dst, int w,
242  int h, ptrdiff_t stride, int is_luma)
243 {
244  int b_x, b_y;
245  ptrdiff_t 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  ptrdiff_t stride, int is_luma)
312 {
313  int b_x, b_y;
314  ptrdiff_t mvx_stride, mvy_stride;
315  const uint8_t *cm = ff_crop_tab + MAX_NEG_CROP;
316  set_mv_strides(s, &mvx_stride, &mvy_stride);
317  mvx_stride >>= is_luma;
318  mvy_stride *= mvx_stride;
319 
320  for (b_y = 0; b_y < h - 1; b_y++) {
321  for (b_x = 0; b_x < w; b_x++) {
322  int x;
323  int top_status = s->error_status_table[(b_x >> is_luma) + (b_y >> is_luma) * s->mb_stride];
324  int bottom_status = s->error_status_table[(b_x >> is_luma) + ((b_y + 1) >> is_luma) * s->mb_stride];
325  int top_intra = IS_INTRA(s->cur_pic.mb_type[(b_x >> is_luma) + ( b_y >> is_luma) * s->mb_stride]);
326  int bottom_intra = IS_INTRA(s->cur_pic.mb_type[(b_x >> is_luma) + ((b_y + 1) >> is_luma) * s->mb_stride]);
327  int top_damage = top_status & ER_MB_ERROR;
328  int bottom_damage = bottom_status & ER_MB_ERROR;
329  int offset = b_x * 8 + b_y * stride * 8;
330 
331  int16_t *top_mv = s->cur_pic.motion_val[0][mvy_stride * b_y + mvx_stride * b_x];
332  int16_t *bottom_mv = s->cur_pic.motion_val[0][mvy_stride * (b_y + 1) + mvx_stride * b_x];
333 
334  if (!(top_damage || bottom_damage))
335  continue; // both undamaged
336 
337  if ((!top_intra) && (!bottom_intra) &&
338  FFABS(top_mv[0] - bottom_mv[0]) +
339  FFABS(top_mv[1] + bottom_mv[1]) < 2)
340  continue;
341 
342  for (x = 0; x < 8; x++) {
343  int a, b, c, d;
344 
345  a = dst[offset + x + 7 * stride] - dst[offset + x + 6 * stride];
346  b = dst[offset + x + 8 * stride] - dst[offset + x + 7 * stride];
347  c = dst[offset + x + 9 * stride] - dst[offset + x + 8 * stride];
348 
349  d = FFABS(b) - ((FFABS(a) + FFABS(c) + 1) >> 1);
350  d = FFMAX(d, 0);
351  if (b < 0)
352  d = -d;
353 
354  if (d == 0)
355  continue;
356 
357  if (!(top_damage && bottom_damage))
358  d = d * 16 / 9;
359 
360  if (top_damage) {
361  dst[offset + x + 7 * stride] = cm[dst[offset + x + 7 * stride] + ((d * 7) >> 4)];
362  dst[offset + x + 6 * stride] = cm[dst[offset + x + 6 * stride] + ((d * 5) >> 4)];
363  dst[offset + x + 5 * stride] = cm[dst[offset + x + 5 * stride] + ((d * 3) >> 4)];
364  dst[offset + x + 4 * stride] = cm[dst[offset + x + 4 * stride] + ((d * 1) >> 4)];
365  }
366  if (bottom_damage) {
367  dst[offset + x + 8 * stride] = cm[dst[offset + x + 8 * stride] - ((d * 7) >> 4)];
368  dst[offset + x + 9 * stride] = cm[dst[offset + x + 9 * stride] - ((d * 5) >> 4)];
369  dst[offset + x + 10 * stride] = cm[dst[offset + x + 10 * stride] - ((d * 3) >> 4)];
370  dst[offset + x + 11 * stride] = cm[dst[offset + x + 11 * stride] - ((d * 1) >> 4)];
371  }
372  }
373  }
374  }
375 }
376 
377 #define MV_FROZEN 8
378 #define MV_CHANGED 4
379 #define MV_UNCHANGED 2
380 #define MV_LISTED 1
381 static av_always_inline void add_blocklist(int (*blocklist)[2], int *blocklist_length, uint8_t *fixed, int mb_x, int mb_y, int mb_xy)
382 {
383  if (fixed[mb_xy])
384  return;
385  fixed[mb_xy] = MV_LISTED;
386  blocklist[ *blocklist_length ][0] = mb_x;
387  blocklist[(*blocklist_length)++][1] = mb_y;
388 }
389 
390 static void guess_mv(ERContext *s)
391 {
392  int (*blocklist)[2], (*next_blocklist)[2];
393  uint8_t *fixed;
394  const ptrdiff_t mb_stride = s->mb_stride;
395  const int mb_width = s->mb_width;
396  int mb_height = s->mb_height;
397  int i, depth, num_avail;
398  int mb_x, mb_y;
399  ptrdiff_t mot_step, mot_stride;
400  int blocklist_length, next_blocklist_length;
401 
402  if (s->last_pic.f && s->last_pic.f->data[0])
403  mb_height = FFMIN(mb_height, (s->last_pic.f->height+15)>>4);
404  if (s->next_pic.f && s->next_pic.f->data[0])
405  mb_height = FFMIN(mb_height, (s->next_pic.f->height+15)>>4);
406 
407  blocklist = (int (*)[2])s->er_temp_buffer;
408  next_blocklist = blocklist + s->mb_stride * s->mb_height;
409  fixed = (uint8_t *)(next_blocklist + s->mb_stride * s->mb_height);
410 
411  set_mv_strides(s, &mot_step, &mot_stride);
412 
413  num_avail = 0;
414  if (s->last_pic.motion_val[0])
415  ff_thread_await_progress(s->last_pic.tf, mb_height-1, 0);
416  for (i = 0; i < mb_width * mb_height; i++) {
417  const int mb_xy = s->mb_index2xy[i];
418  int f = 0;
419  int error = s->error_status_table[mb_xy];
420 
421  if (IS_INTRA(s->cur_pic.mb_type[mb_xy]))
422  f = MV_FROZEN; // intra // FIXME check
423  if (!(error & ER_MV_ERROR))
424  f = MV_FROZEN; // inter with undamaged MV
425 
426  fixed[mb_xy] = f;
427  if (f == MV_FROZEN)
428  num_avail++;
429  else if(s->last_pic.f->data[0] && s->last_pic.motion_val[0]){
430  const int mb_y= mb_xy / s->mb_stride;
431  const int mb_x= mb_xy % s->mb_stride;
432  const int mot_index= (mb_x + mb_y*mot_stride) * mot_step;
433  s->cur_pic.motion_val[0][mot_index][0]= s->last_pic.motion_val[0][mot_index][0];
434  s->cur_pic.motion_val[0][mot_index][1]= s->last_pic.motion_val[0][mot_index][1];
435  s->cur_pic.ref_index[0][4*mb_xy] = s->last_pic.ref_index[0][4*mb_xy];
436  }
437  }
438 
439  if ((!(s->avctx->error_concealment&FF_EC_GUESS_MVS)) ||
440  num_avail <= mb_width / 2) {
441  for (mb_y = 0; mb_y < mb_height; mb_y++) {
442  for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
443  const int mb_xy = mb_x + mb_y * s->mb_stride;
444  int mv_dir = (s->last_pic.f && s->last_pic.f->data[0]) ? MV_DIR_FORWARD : MV_DIR_BACKWARD;
445 
446  if (IS_INTRA(s->cur_pic.mb_type[mb_xy]))
447  continue;
448  if (!(s->error_status_table[mb_xy] & ER_MV_ERROR))
449  continue;
450 
451  s->mv[0][0][0] = 0;
452  s->mv[0][0][1] = 0;
453  s->decode_mb(s->opaque, 0, mv_dir, MV_TYPE_16X16, &s->mv,
454  mb_x, mb_y, 0, 0);
455  }
456  }
457  return;
458  }
459 
460  blocklist_length = 0;
461  for (mb_y = 0; mb_y < mb_height; mb_y++) {
462  for (mb_x = 0; mb_x < mb_width; mb_x++) {
463  const int mb_xy = mb_x + mb_y * mb_stride;
464  if (fixed[mb_xy] == MV_FROZEN) {
465  if (mb_x) add_blocklist(blocklist, &blocklist_length, fixed, mb_x - 1, mb_y, mb_xy - 1);
466  if (mb_y) add_blocklist(blocklist, &blocklist_length, fixed, mb_x, mb_y - 1, mb_xy - mb_stride);
467  if (mb_x+1 < mb_width) add_blocklist(blocklist, &blocklist_length, fixed, mb_x + 1, mb_y, mb_xy + 1);
468  if (mb_y+1 < mb_height) add_blocklist(blocklist, &blocklist_length, fixed, mb_x, mb_y + 1, mb_xy + mb_stride);
469  }
470  }
471  }
472 
473  for (depth = 0; ; depth++) {
474  int changed, pass, none_left;
475  int blocklist_index;
476 
477  none_left = 1;
478  changed = 1;
479  for (pass = 0; (changed || pass < 2) && pass < 10; pass++) {
480  int score_sum = 0;
481 
482  changed = 0;
483  for (blocklist_index = 0; blocklist_index < blocklist_length; blocklist_index++) {
484  const int mb_x = blocklist[blocklist_index][0];
485  const int mb_y = blocklist[blocklist_index][1];
486  const int mb_xy = mb_x + mb_y * mb_stride;
487  int mv_predictor[8][2];
488  int ref[8];
489  int pred_count;
490  int j;
491  int best_score;
492  int best_pred;
493  int mot_index;
494  int prev_x, prev_y, prev_ref;
495 
496  if ((mb_x ^ mb_y ^ pass) & 1)
497  continue;
498  av_assert2(fixed[mb_xy] != MV_FROZEN);
499 
500 
501  av_assert1(!IS_INTRA(s->cur_pic.mb_type[mb_xy]));
502  av_assert1(s->last_pic.f && s->last_pic.f->data[0]);
503 
504  j = 0;
505  if (mb_x > 0)
506  j |= fixed[mb_xy - 1];
507  if (mb_x + 1 < mb_width)
508  j |= fixed[mb_xy + 1];
509  if (mb_y > 0)
510  j |= fixed[mb_xy - mb_stride];
511  if (mb_y + 1 < mb_height)
512  j |= fixed[mb_xy + mb_stride];
513 
514  av_assert2(j & MV_FROZEN);
515 
516  if (!(j & MV_CHANGED) && pass > 1)
517  continue;
518 
519  none_left = 0;
520  pred_count = 0;
521  mot_index = (mb_x + mb_y * mot_stride) * mot_step;
522 
523  if (mb_x > 0 && fixed[mb_xy - 1] > 1) {
524  mv_predictor[pred_count][0] =
525  s->cur_pic.motion_val[0][mot_index - mot_step][0];
526  mv_predictor[pred_count][1] =
527  s->cur_pic.motion_val[0][mot_index - mot_step][1];
528  ref[pred_count] =
529  s->cur_pic.ref_index[0][4 * (mb_xy - 1)];
530  pred_count++;
531  }
532  if (mb_x + 1 < mb_width && fixed[mb_xy + 1] > 1) {
533  mv_predictor[pred_count][0] =
534  s->cur_pic.motion_val[0][mot_index + mot_step][0];
535  mv_predictor[pred_count][1] =
536  s->cur_pic.motion_val[0][mot_index + mot_step][1];
537  ref[pred_count] =
538  s->cur_pic.ref_index[0][4 * (mb_xy + 1)];
539  pred_count++;
540  }
541  if (mb_y > 0 && fixed[mb_xy - mb_stride] > 1) {
542  mv_predictor[pred_count][0] =
543  s->cur_pic.motion_val[0][mot_index - mot_stride * mot_step][0];
544  mv_predictor[pred_count][1] =
545  s->cur_pic.motion_val[0][mot_index - mot_stride * mot_step][1];
546  ref[pred_count] =
547  s->cur_pic.ref_index[0][4 * (mb_xy - s->mb_stride)];
548  pred_count++;
549  }
550  if (mb_y + 1<mb_height && fixed[mb_xy + mb_stride] > 1) {
551  mv_predictor[pred_count][0] =
552  s->cur_pic.motion_val[0][mot_index + mot_stride * mot_step][0];
553  mv_predictor[pred_count][1] =
554  s->cur_pic.motion_val[0][mot_index + mot_stride * mot_step][1];
555  ref[pred_count] =
556  s->cur_pic.ref_index[0][4 * (mb_xy + s->mb_stride)];
557  pred_count++;
558  }
559  if (pred_count == 0)
560  continue;
561 
562  if (pred_count > 1) {
563  int sum_x = 0, sum_y = 0, sum_r = 0;
564  int max_x, max_y, min_x, min_y, max_r, min_r;
565 
566  for (j = 0; j < pred_count; j++) {
567  sum_x += mv_predictor[j][0];
568  sum_y += mv_predictor[j][1];
569  sum_r += ref[j];
570  if (j && ref[j] != ref[j - 1])
571  goto skip_mean_and_median;
572  }
573 
574  /* mean */
575  mv_predictor[pred_count][0] = sum_x / j;
576  mv_predictor[pred_count][1] = sum_y / j;
577  ref[pred_count] = sum_r / j;
578 
579  /* median */
580  if (pred_count >= 3) {
581  min_y = min_x = min_r = 99999;
582  max_y = max_x = max_r = -99999;
583  } else {
584  min_x = min_y = max_x = max_y = min_r = max_r = 0;
585  }
586  for (j = 0; j < pred_count; j++) {
587  max_x = FFMAX(max_x, mv_predictor[j][0]);
588  max_y = FFMAX(max_y, mv_predictor[j][1]);
589  max_r = FFMAX(max_r, ref[j]);
590  min_x = FFMIN(min_x, mv_predictor[j][0]);
591  min_y = FFMIN(min_y, mv_predictor[j][1]);
592  min_r = FFMIN(min_r, ref[j]);
593  }
594  mv_predictor[pred_count + 1][0] = sum_x - max_x - min_x;
595  mv_predictor[pred_count + 1][1] = sum_y - max_y - min_y;
596  ref[pred_count + 1] = sum_r - max_r - min_r;
597 
598  if (pred_count == 4) {
599  mv_predictor[pred_count + 1][0] /= 2;
600  mv_predictor[pred_count + 1][1] /= 2;
601  ref[pred_count + 1] /= 2;
602  }
603  pred_count += 2;
604  }
605 
606 skip_mean_and_median:
607  /* zero MV */
608  mv_predictor[pred_count][0] =
609  mv_predictor[pred_count][1] =
610  ref[pred_count] = 0;
611  pred_count++;
612 
613  prev_x = s->cur_pic.motion_val[0][mot_index][0];
614  prev_y = s->cur_pic.motion_val[0][mot_index][1];
615  prev_ref = s->cur_pic.ref_index[0][4 * mb_xy];
616 
617  /* last MV */
618  mv_predictor[pred_count][0] = prev_x;
619  mv_predictor[pred_count][1] = prev_y;
620  ref[pred_count] = prev_ref;
621  pred_count++;
622 
623  best_pred = 0;
624  best_score = 256 * 256 * 256 * 64;
625  for (j = 0; j < pred_count; j++) {
626  int *linesize = s->cur_pic.f->linesize;
627  int score = 0;
628  uint8_t *src = s->cur_pic.f->data[0] +
629  mb_x * 16 + mb_y * 16 * linesize[0];
630 
631  s->cur_pic.motion_val[0][mot_index][0] =
632  s->mv[0][0][0] = mv_predictor[j][0];
633  s->cur_pic.motion_val[0][mot_index][1] =
634  s->mv[0][0][1] = mv_predictor[j][1];
635 
636  // predictor intra or otherwise not available
637  if (ref[j] < 0)
638  continue;
639 
640  s->decode_mb(s->opaque, ref[j], MV_DIR_FORWARD,
641  MV_TYPE_16X16, &s->mv, mb_x, mb_y, 0, 0);
642 
643  if (mb_x > 0 && fixed[mb_xy - 1] > 1) {
644  int k;
645  for (k = 0; k < 16; k++)
646  score += FFABS(src[k * linesize[0] - 1] -
647  src[k * linesize[0]]);
648  }
649  if (mb_x + 1 < mb_width && fixed[mb_xy + 1] > 1) {
650  int k;
651  for (k = 0; k < 16; k++)
652  score += FFABS(src[k * linesize[0] + 15] -
653  src[k * linesize[0] + 16]);
654  }
655  if (mb_y > 0 && fixed[mb_xy - mb_stride] > 1) {
656  int k;
657  for (k = 0; k < 16; k++)
658  score += FFABS(src[k - linesize[0]] - src[k]);
659  }
660  if (mb_y + 1 < mb_height && fixed[mb_xy + mb_stride] > 1) {
661  int k;
662  for (k = 0; k < 16; k++)
663  score += FFABS(src[k + linesize[0] * 15] -
664  src[k + linesize[0] * 16]);
665  }
666 
667  if (score <= best_score) { // <= will favor the last MV
668  best_score = score;
669  best_pred = j;
670  }
671  }
672  score_sum += best_score;
673  s->mv[0][0][0] = mv_predictor[best_pred][0];
674  s->mv[0][0][1] = mv_predictor[best_pred][1];
675 
676  for (i = 0; i < mot_step; i++)
677  for (j = 0; j < mot_step; j++) {
678  s->cur_pic.motion_val[0][mot_index + i + j * mot_stride][0] = s->mv[0][0][0];
679  s->cur_pic.motion_val[0][mot_index + i + j * mot_stride][1] = s->mv[0][0][1];
680  }
681 
682  s->decode_mb(s->opaque, ref[best_pred], MV_DIR_FORWARD,
683  MV_TYPE_16X16, &s->mv, mb_x, mb_y, 0, 0);
684 
685 
686  if (s->mv[0][0][0] != prev_x || s->mv[0][0][1] != prev_y) {
687  fixed[mb_xy] = MV_CHANGED;
688  changed++;
689  } else
690  fixed[mb_xy] = MV_UNCHANGED;
691  }
692  }
693 
694  if (none_left)
695  return;
696 
697  next_blocklist_length = 0;
698 
699  for (blocklist_index = 0; blocklist_index < blocklist_length; blocklist_index++) {
700  const int mb_x = blocklist[blocklist_index][0];
701  const int mb_y = blocklist[blocklist_index][1];
702  const int mb_xy = mb_x + mb_y * mb_stride;
703 
704  if (fixed[mb_xy] & (MV_CHANGED|MV_UNCHANGED|MV_FROZEN)) {
705  fixed[mb_xy] = MV_FROZEN;
706  if (mb_x > 0)
707  add_blocklist(next_blocklist, &next_blocklist_length, fixed, mb_x - 1, mb_y, mb_xy - 1);
708  if (mb_y > 0)
709  add_blocklist(next_blocklist, &next_blocklist_length, fixed, mb_x, mb_y - 1, mb_xy - mb_stride);
710  if (mb_x + 1 < mb_width)
711  add_blocklist(next_blocklist, &next_blocklist_length, fixed, mb_x + 1, mb_y, mb_xy + 1);
712  if (mb_y + 1 < mb_height)
713  add_blocklist(next_blocklist, &next_blocklist_length, fixed, mb_x, mb_y + 1, mb_xy + mb_stride);
714  }
715  }
716  av_assert0(next_blocklist_length <= mb_height * mb_width);
717  FFSWAP(int , blocklist_length, next_blocklist_length);
718  FFSWAP(void*, blocklist, next_blocklist);
719  }
720 }
721 
722 static int is_intra_more_likely(ERContext *s)
723 {
724  int is_intra_likely, i, j, undamaged_count, skip_amount, mb_x, mb_y;
725 
726  if (!s->last_pic.f || !s->last_pic.f->data[0])
727  return 1; // no previous frame available -> use spatial prediction
728 
729  if (s->avctx->error_concealment & FF_EC_FAVOR_INTER)
730  return 0;
731 
732  undamaged_count = 0;
733  for (i = 0; i < s->mb_num; i++) {
734  const int mb_xy = s->mb_index2xy[i];
735  const int error = s->error_status_table[mb_xy];
736  if (!((error & ER_DC_ERROR) && (error & ER_MV_ERROR)))
737  undamaged_count++;
738  }
739 
740  if (undamaged_count < 5)
741  return 0; // almost all MBs damaged -> use temporal prediction
742 
743  // prevent dsp.sad() check, that requires access to the image
744  if (CONFIG_XVMC &&
745  s->avctx->hwaccel && s->avctx->hwaccel->decode_mb &&
746  s->cur_pic.f->pict_type == AV_PICTURE_TYPE_I)
747  return 1;
748 
749  skip_amount = FFMAX(undamaged_count / 50, 1); // check only up to 50 MBs
750  is_intra_likely = 0;
751 
752  j = 0;
753  for (mb_y = 0; mb_y < s->mb_height - 1; mb_y++) {
754  for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
755  int error;
756  const int mb_xy = mb_x + mb_y * s->mb_stride;
757 
758  error = s->error_status_table[mb_xy];
759  if ((error & ER_DC_ERROR) && (error & ER_MV_ERROR))
760  continue; // skip damaged
761 
762  j++;
763  // skip a few to speed things up
764  if ((j % skip_amount) != 0)
765  continue;
766 
767  if (s->cur_pic.f->pict_type == AV_PICTURE_TYPE_I) {
768  int *linesize = s->cur_pic.f->linesize;
769  uint8_t *mb_ptr = s->cur_pic.f->data[0] +
770  mb_x * 16 + mb_y * 16 * linesize[0];
771  uint8_t *last_mb_ptr = s->last_pic.f->data[0] +
772  mb_x * 16 + mb_y * 16 * linesize[0];
773 
774  if (s->avctx->codec_id == AV_CODEC_ID_H264) {
775  // FIXME
776  } else {
777  ff_thread_await_progress(s->last_pic.tf, mb_y, 0);
778  }
779  is_intra_likely += s->mecc.sad[0](NULL, last_mb_ptr, mb_ptr,
780  linesize[0], 16);
781  // FIXME need await_progress() here
782  is_intra_likely -= s->mecc.sad[0](NULL, last_mb_ptr,
783  last_mb_ptr + linesize[0] * 16,
784  linesize[0], 16);
785  } else {
786  if (IS_INTRA(s->cur_pic.mb_type[mb_xy]))
787  is_intra_likely++;
788  else
789  is_intra_likely--;
790  }
791  }
792  }
793 // av_log(NULL, AV_LOG_ERROR, "is_intra_likely: %d type:%d\n", is_intra_likely, s->pict_type);
794  return is_intra_likely > 0;
795 }
796 
797 void ff_er_frame_start(ERContext *s)
798 {
799  if (!s->avctx->error_concealment)
800  return;
801 
802  if (!s->mecc_inited) {
803  ff_me_cmp_init(&s->mecc, s->avctx);
804  s->mecc_inited = 1;
805  }
806 
807  memset(s->error_status_table, ER_MB_ERROR | VP_START | ER_MB_END,
808  s->mb_stride * s->mb_height * sizeof(uint8_t));
809  atomic_init(&s->error_count, 3 * s->mb_num);
810  s->error_occurred = 0;
811 }
812 
813 static int er_supported(ERContext *s)
814 {
815  if(s->avctx->hwaccel && s->avctx->hwaccel->decode_slice ||
816  !s->cur_pic.f ||
817  s->cur_pic.field_picture ||
818  s->avctx->profile == FF_PROFILE_MPEG4_SIMPLE_STUDIO
819  )
820  return 0;
821  return 1;
822 }
823 
824 /**
825  * Add a slice.
826  * @param endx x component of the last macroblock, can be -1
827  * for the last of the previous line
828  * @param status the status at the end (ER_MV_END, ER_AC_ERROR, ...), it is
829  * assumed that no earlier end or error of the same type occurred
830  */
831 void ff_er_add_slice(ERContext *s, int startx, int starty,
832  int endx, int endy, int status)
833 {
834  const int start_i = av_clip(startx + starty * s->mb_width, 0, s->mb_num - 1);
835  const int end_i = av_clip(endx + endy * s->mb_width, 0, s->mb_num);
836  const int start_xy = s->mb_index2xy[start_i];
837  const int end_xy = s->mb_index2xy[end_i];
838  int mask = -1;
839 
840  if (s->avctx->hwaccel && s->avctx->hwaccel->decode_slice)
841  return;
842 
843  if (start_i > end_i || start_xy > end_xy) {
844  av_log(s->avctx, AV_LOG_ERROR,
845  "internal error, slice end before start\n");
846  return;
847  }
848 
849  if (!s->avctx->error_concealment)
850  return;
851 
852  mask &= ~VP_START;
853  if (status & (ER_AC_ERROR | ER_AC_END)) {
854  mask &= ~(ER_AC_ERROR | ER_AC_END);
855  atomic_fetch_add(&s->error_count, start_i - end_i - 1);
856  }
857  if (status & (ER_DC_ERROR | ER_DC_END)) {
858  mask &= ~(ER_DC_ERROR | ER_DC_END);
859  atomic_fetch_add(&s->error_count, start_i - end_i - 1);
860  }
861  if (status & (ER_MV_ERROR | ER_MV_END)) {
862  mask &= ~(ER_MV_ERROR | ER_MV_END);
863  atomic_fetch_add(&s->error_count, start_i - end_i - 1);
864  }
865 
866  if (status & ER_MB_ERROR) {
867  s->error_occurred = 1;
868  atomic_store(&s->error_count, INT_MAX);
869  }
870 
871  if (mask == ~0x7F) {
872  memset(&s->error_status_table[start_xy], 0,
873  (end_xy - start_xy) * sizeof(uint8_t));
874  } else {
875  int i;
876  for (i = start_xy; i < end_xy; i++)
877  s->error_status_table[i] &= mask;
878  }
879 
880  if (end_i == s->mb_num)
881  atomic_store(&s->error_count, INT_MAX);
882  else {
883  s->error_status_table[end_xy] &= mask;
884  s->error_status_table[end_xy] |= status;
885  }
886 
887  s->error_status_table[start_xy] |= VP_START;
888 
889  if (start_xy > 0 && !(s->avctx->active_thread_type & FF_THREAD_SLICE) &&
890  er_supported(s) && s->avctx->skip_top * s->mb_width < start_i) {
891  int prev_status = s->error_status_table[s->mb_index2xy[start_i - 1]];
892 
893  prev_status &= ~ VP_START;
894  if (prev_status != (ER_MV_END | ER_DC_END | ER_AC_END)) {
895  s->error_occurred = 1;
896  atomic_store(&s->error_count, INT_MAX);
897  }
898  }
899 }
900 
901 void ff_er_frame_end(ERContext *s)
902 {
903  int *linesize = NULL;
904  int i, mb_x, mb_y, error, error_type, dc_error, mv_error, ac_error;
905  int distance;
906  int threshold_part[4] = { 100, 100, 100 };
907  int threshold = 50;
908  int is_intra_likely;
909  int size = s->b8_stride * 2 * s->mb_height;
910 
911  /* We do not support ER of field pictures yet,
912  * though it should not crash if enabled. */
913  if (!s->avctx->error_concealment || !atomic_load(&s->error_count) ||
914  s->avctx->lowres ||
915  !er_supported(s) ||
916  atomic_load(&s->error_count) == 3 * s->mb_width *
917  (s->avctx->skip_top + s->avctx->skip_bottom)) {
918  return;
919  }
920  linesize = s->cur_pic.f->linesize;
921  for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
922  int status = s->error_status_table[mb_x + (s->mb_height - 1) * s->mb_stride];
923  if (status != 0x7F)
924  break;
925  }
926 
927  if ( mb_x == s->mb_width
928  && s->avctx->codec_id == AV_CODEC_ID_MPEG2VIDEO
929  && (FFALIGN(s->avctx->height, 16)&16)
930  && atomic_load(&s->error_count) == 3 * s->mb_width * (s->avctx->skip_top + s->avctx->skip_bottom + 1)
931  ) {
932  av_log(s->avctx, AV_LOG_DEBUG, "ignoring last missing slice\n");
933  return;
934  }
935 
936  if (s->last_pic.f) {
937  if (s->last_pic.f->width != s->cur_pic.f->width ||
938  s->last_pic.f->height != s->cur_pic.f->height ||
939  s->last_pic.f->format != s->cur_pic.f->format) {
940  av_log(s->avctx, AV_LOG_WARNING, "Cannot use previous picture in error concealment\n");
941  memset(&s->last_pic, 0, sizeof(s->last_pic));
942  }
943  }
944  if (s->next_pic.f) {
945  if (s->next_pic.f->width != s->cur_pic.f->width ||
946  s->next_pic.f->height != s->cur_pic.f->height ||
947  s->next_pic.f->format != s->cur_pic.f->format) {
948  av_log(s->avctx, AV_LOG_WARNING, "Cannot use next picture in error concealment\n");
949  memset(&s->next_pic, 0, sizeof(s->next_pic));
950  }
951  }
952 
953  if (!s->cur_pic.motion_val[0] || !s->cur_pic.ref_index[0]) {
954  av_log(s->avctx, AV_LOG_ERROR, "Warning MVs not available\n");
955 
956  for (i = 0; i < 2; i++) {
957  s->ref_index_buf[i] = av_buffer_allocz(s->mb_stride * s->mb_height * 4 * sizeof(uint8_t));
958  s->motion_val_buf[i] = av_buffer_allocz((size + 4) * 2 * sizeof(uint16_t));
959  if (!s->ref_index_buf[i] || !s->motion_val_buf[i])
960  break;
961  s->cur_pic.ref_index[i] = s->ref_index_buf[i]->data;
962  s->cur_pic.motion_val[i] = (int16_t (*)[2])s->motion_val_buf[i]->data + 4;
963  }
964  if (i < 2) {
965  for (i = 0; i < 2; i++) {
966  av_buffer_unref(&s->ref_index_buf[i]);
967  av_buffer_unref(&s->motion_val_buf[i]);
968  s->cur_pic.ref_index[i] = NULL;
969  s->cur_pic.motion_val[i] = NULL;
970  }
971  return;
972  }
973  }
974 
975  if (s->avctx->debug & FF_DEBUG_ER) {
976  for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
977  for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
978  int status = s->error_status_table[mb_x + mb_y * s->mb_stride];
979 
980  av_log(s->avctx, AV_LOG_DEBUG, "%2X ", status);
981  }
982  av_log(s->avctx, AV_LOG_DEBUG, "\n");
983  }
984  }
985 
986 #if 1
987  /* handle overlapping slices */
988  for (error_type = 1; error_type <= 3; error_type++) {
989  int end_ok = 0;
990 
991  for (i = s->mb_num - 1; i >= 0; i--) {
992  const int mb_xy = s->mb_index2xy[i];
993  int error = s->error_status_table[mb_xy];
994 
995  if (error & (1 << error_type))
996  end_ok = 1;
997  if (error & (8 << error_type))
998  end_ok = 1;
999 
1000  if (!end_ok)
1001  s->error_status_table[mb_xy] |= 1 << error_type;
1002 
1003  if (error & VP_START)
1004  end_ok = 0;
1005  }
1006  }
1007 #endif
1008 #if 1
1009  /* handle slices with partitions of different length */
1010  if (s->partitioned_frame) {
1011  int end_ok = 0;
1012 
1013  for (i = s->mb_num - 1; i >= 0; i--) {
1014  const int mb_xy = s->mb_index2xy[i];
1015  int error = s->error_status_table[mb_xy];
1016 
1017  if (error & ER_AC_END)
1018  end_ok = 0;
1019  if ((error & ER_MV_END) ||
1020  (error & ER_DC_END) ||
1021  (error & ER_AC_ERROR))
1022  end_ok = 1;
1023 
1024  if (!end_ok)
1025  s->error_status_table[mb_xy]|= ER_AC_ERROR;
1026 
1027  if (error & VP_START)
1028  end_ok = 0;
1029  }
1030  }
1031 #endif
1032  /* handle missing slices */
1033  if (s->avctx->err_recognition & AV_EF_EXPLODE) {
1034  int end_ok = 1;
1035 
1036  // FIXME + 100 hack
1037  for (i = s->mb_num - 2; i >= s->mb_width + 100; i--) {
1038  const int mb_xy = s->mb_index2xy[i];
1039  int error1 = s->error_status_table[mb_xy];
1040  int error2 = s->error_status_table[s->mb_index2xy[i + 1]];
1041 
1042  if (error1 & VP_START)
1043  end_ok = 1;
1044 
1045  if (error2 == (VP_START | ER_MB_ERROR | ER_MB_END) &&
1046  error1 != (VP_START | ER_MB_ERROR | ER_MB_END) &&
1047  ((error1 & ER_AC_END) || (error1 & ER_DC_END) ||
1048  (error1 & ER_MV_END))) {
1049  // end & uninit
1050  end_ok = 0;
1051  }
1052 
1053  if (!end_ok)
1054  s->error_status_table[mb_xy] |= ER_MB_ERROR;
1055  }
1056  }
1057 
1058 #if 1
1059  /* backward mark errors */
1060  distance = 9999999;
1061  for (error_type = 1; error_type <= 3; error_type++) {
1062  for (i = s->mb_num - 1; i >= 0; i--) {
1063  const int mb_xy = s->mb_index2xy[i];
1064  int error = s->error_status_table[mb_xy];
1065 
1066  if (!s->mbskip_table || !s->mbskip_table[mb_xy]) // FIXME partition specific
1067  distance++;
1068  if (error & (1 << error_type))
1069  distance = 0;
1070 
1071  if (s->partitioned_frame) {
1072  if (distance < threshold_part[error_type - 1])
1073  s->error_status_table[mb_xy] |= 1 << error_type;
1074  } else {
1075  if (distance < threshold)
1076  s->error_status_table[mb_xy] |= 1 << error_type;
1077  }
1078 
1079  if (error & VP_START)
1080  distance = 9999999;
1081  }
1082  }
1083 #endif
1084 
1085  /* forward mark errors */
1086  error = 0;
1087  for (i = 0; i < s->mb_num; i++) {
1088  const int mb_xy = s->mb_index2xy[i];
1089  int old_error = s->error_status_table[mb_xy];
1090 
1091  if (old_error & VP_START) {
1092  error = old_error & ER_MB_ERROR;
1093  } else {
1094  error |= old_error & ER_MB_ERROR;
1095  s->error_status_table[mb_xy] |= error;
1096  }
1097  }
1098 #if 1
1099  /* handle not partitioned case */
1100  if (!s->partitioned_frame) {
1101  for (i = 0; i < s->mb_num; i++) {
1102  const int mb_xy = s->mb_index2xy[i];
1103  int error = s->error_status_table[mb_xy];
1104  if (error & ER_MB_ERROR)
1105  error |= ER_MB_ERROR;
1106  s->error_status_table[mb_xy] = error;
1107  }
1108  }
1109 #endif
1110 
1111  dc_error = ac_error = mv_error = 0;
1112  for (i = 0; i < s->mb_num; i++) {
1113  const int mb_xy = s->mb_index2xy[i];
1114  int error = s->error_status_table[mb_xy];
1115  if (error & ER_DC_ERROR)
1116  dc_error++;
1117  if (error & ER_AC_ERROR)
1118  ac_error++;
1119  if (error & ER_MV_ERROR)
1120  mv_error++;
1121  }
1122  av_log(s->avctx, AV_LOG_INFO, "concealing %d DC, %d AC, %d MV errors in %c frame\n",
1123  dc_error, ac_error, mv_error, av_get_picture_type_char(s->cur_pic.f->pict_type));
1124 
1125  is_intra_likely = is_intra_more_likely(s);
1126 
1127  /* set unknown mb-type to most likely */
1128  for (i = 0; i < s->mb_num; i++) {
1129  const int mb_xy = s->mb_index2xy[i];
1130  int error = s->error_status_table[mb_xy];
1131  if (!((error & ER_DC_ERROR) && (error & ER_MV_ERROR)))
1132  continue;
1133 
1134  if (is_intra_likely)
1135  s->cur_pic.mb_type[mb_xy] = MB_TYPE_INTRA4x4;
1136  else
1137  s->cur_pic.mb_type[mb_xy] = MB_TYPE_16x16 | MB_TYPE_L0;
1138  }
1139 
1140  // change inter to intra blocks if no reference frames are available
1141  if (!(s->last_pic.f && s->last_pic.f->data[0]) &&
1142  !(s->next_pic.f && s->next_pic.f->data[0]))
1143  for (i = 0; i < s->mb_num; i++) {
1144  const int mb_xy = s->mb_index2xy[i];
1145  if (!IS_INTRA(s->cur_pic.mb_type[mb_xy]))
1146  s->cur_pic.mb_type[mb_xy] = MB_TYPE_INTRA4x4;
1147  }
1148 
1149  /* handle inter blocks with damaged AC */
1150  for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1151  for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1152  const int mb_xy = mb_x + mb_y * s->mb_stride;
1153  const int mb_type = s->cur_pic.mb_type[mb_xy];
1154  const int dir = !(s->last_pic.f && s->last_pic.f->data[0]);
1155  const int mv_dir = dir ? MV_DIR_BACKWARD : MV_DIR_FORWARD;
1156  int mv_type;
1157 
1158  int error = s->error_status_table[mb_xy];
1159 
1160  if (IS_INTRA(mb_type))
1161  continue; // intra
1162  if (error & ER_MV_ERROR)
1163  continue; // inter with damaged MV
1164  if (!(error & ER_AC_ERROR))
1165  continue; // undamaged inter
1166 
1167  if (IS_8X8(mb_type)) {
1168  int mb_index = mb_x * 2 + mb_y * 2 * s->b8_stride;
1169  int j;
1170  mv_type = MV_TYPE_8X8;
1171  for (j = 0; j < 4; j++) {
1172  s->mv[0][j][0] = s->cur_pic.motion_val[dir][mb_index + (j & 1) + (j >> 1) * s->b8_stride][0];
1173  s->mv[0][j][1] = s->cur_pic.motion_val[dir][mb_index + (j & 1) + (j >> 1) * s->b8_stride][1];
1174  }
1175  } else {
1176  mv_type = MV_TYPE_16X16;
1177  s->mv[0][0][0] = s->cur_pic.motion_val[dir][mb_x * 2 + mb_y * 2 * s->b8_stride][0];
1178  s->mv[0][0][1] = s->cur_pic.motion_val[dir][mb_x * 2 + mb_y * 2 * s->b8_stride][1];
1179  }
1180 
1181  s->decode_mb(s->opaque, 0 /* FIXME H.264 partitioned slices need this set */,
1182  mv_dir, mv_type, &s->mv, mb_x, mb_y, 0, 0);
1183  }
1184  }
1185 
1186  /* guess MVs */
1187  if (s->cur_pic.f->pict_type == AV_PICTURE_TYPE_B) {
1188  for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1189  for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1190  int xy = mb_x * 2 + mb_y * 2 * s->b8_stride;
1191  const int mb_xy = mb_x + mb_y * s->mb_stride;
1192  const int mb_type = s->cur_pic.mb_type[mb_xy];
1193  int mv_dir = MV_DIR_FORWARD | MV_DIR_BACKWARD;
1194 
1195  int error = s->error_status_table[mb_xy];
1196 
1197  if (IS_INTRA(mb_type))
1198  continue;
1199  if (!(error & ER_MV_ERROR))
1200  continue; // inter with undamaged MV
1201  if (!(error & ER_AC_ERROR))
1202  continue; // undamaged inter
1203 
1204  if (!(s->last_pic.f && s->last_pic.f->data[0]))
1205  mv_dir &= ~MV_DIR_FORWARD;
1206  if (!(s->next_pic.f && s->next_pic.f->data[0]))
1207  mv_dir &= ~MV_DIR_BACKWARD;
1208 
1209  if (s->pp_time) {
1210  int time_pp = s->pp_time;
1211  int time_pb = s->pb_time;
1212 
1213  av_assert0(s->avctx->codec_id != AV_CODEC_ID_H264);
1214  ff_thread_await_progress(s->next_pic.tf, mb_y, 0);
1215 
1216  s->mv[0][0][0] = s->next_pic.motion_val[0][xy][0] * time_pb / time_pp;
1217  s->mv[0][0][1] = s->next_pic.motion_val[0][xy][1] * time_pb / time_pp;
1218  s->mv[1][0][0] = s->next_pic.motion_val[0][xy][0] * (time_pb - time_pp) / time_pp;
1219  s->mv[1][0][1] = s->next_pic.motion_val[0][xy][1] * (time_pb - time_pp) / time_pp;
1220  } else {
1221  s->mv[0][0][0] = 0;
1222  s->mv[0][0][1] = 0;
1223  s->mv[1][0][0] = 0;
1224  s->mv[1][0][1] = 0;
1225  }
1226 
1227  s->decode_mb(s->opaque, 0, mv_dir, MV_TYPE_16X16, &s->mv,
1228  mb_x, mb_y, 0, 0);
1229  }
1230  }
1231  } else
1232  guess_mv(s);
1233 
1234  /* the filters below manipulate raw image, skip them */
1235  if (CONFIG_XVMC && s->avctx->hwaccel && s->avctx->hwaccel->decode_mb)
1236  goto ec_clean;
1237  /* fill DC for inter blocks */
1238  for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1239  for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1240  int dc, dcu, dcv, y, n;
1241  int16_t *dc_ptr;
1242  uint8_t *dest_y, *dest_cb, *dest_cr;
1243  const int mb_xy = mb_x + mb_y * s->mb_stride;
1244  const int mb_type = s->cur_pic.mb_type[mb_xy];
1245 
1246  // error = s->error_status_table[mb_xy];
1247 
1248  if (IS_INTRA(mb_type) && s->partitioned_frame)
1249  continue;
1250  // if (error & ER_MV_ERROR)
1251  // continue; // inter data damaged FIXME is this good?
1252 
1253  dest_y = s->cur_pic.f->data[0] + mb_x * 16 + mb_y * 16 * linesize[0];
1254  dest_cb = s->cur_pic.f->data[1] + mb_x * 8 + mb_y * 8 * linesize[1];
1255  dest_cr = s->cur_pic.f->data[2] + mb_x * 8 + mb_y * 8 * linesize[2];
1256 
1257  dc_ptr = &s->dc_val[0][mb_x * 2 + mb_y * 2 * s->b8_stride];
1258  for (n = 0; n < 4; n++) {
1259  dc = 0;
1260  for (y = 0; y < 8; y++) {
1261  int x;
1262  for (x = 0; x < 8; x++)
1263  dc += dest_y[x + (n & 1) * 8 +
1264  (y + (n >> 1) * 8) * linesize[0]];
1265  }
1266  dc_ptr[(n & 1) + (n >> 1) * s->b8_stride] = (dc + 4) >> 3;
1267  }
1268 
1269  if (!s->cur_pic.f->data[2])
1270  continue;
1271 
1272  dcu = dcv = 0;
1273  for (y = 0; y < 8; y++) {
1274  int x;
1275  for (x = 0; x < 8; x++) {
1276  dcu += dest_cb[x + y * linesize[1]];
1277  dcv += dest_cr[x + y * linesize[2]];
1278  }
1279  }
1280  s->dc_val[1][mb_x + mb_y * s->mb_stride] = (dcu + 4) >> 3;
1281  s->dc_val[2][mb_x + mb_y * s->mb_stride] = (dcv + 4) >> 3;
1282  }
1283  }
1284 #if 1
1285  /* guess DC for damaged blocks */
1286  guess_dc(s, s->dc_val[0], s->mb_width*2, s->mb_height*2, s->b8_stride, 1);
1287  guess_dc(s, s->dc_val[1], s->mb_width , s->mb_height , s->mb_stride, 0);
1288  guess_dc(s, s->dc_val[2], s->mb_width , s->mb_height , s->mb_stride, 0);
1289 #endif
1290 
1291  /* filter luma DC */
1292  filter181(s->dc_val[0], s->mb_width * 2, s->mb_height * 2, s->b8_stride);
1293 
1294 #if 1
1295  /* render DC only intra */
1296  for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1297  for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1298  uint8_t *dest_y, *dest_cb, *dest_cr;
1299  const int mb_xy = mb_x + mb_y * s->mb_stride;
1300  const int mb_type = s->cur_pic.mb_type[mb_xy];
1301 
1302  int error = s->error_status_table[mb_xy];
1303 
1304  if (IS_INTER(mb_type))
1305  continue;
1306  if (!(error & ER_AC_ERROR))
1307  continue; // undamaged
1308 
1309  dest_y = s->cur_pic.f->data[0] + mb_x * 16 + mb_y * 16 * linesize[0];
1310  dest_cb = s->cur_pic.f->data[1] + mb_x * 8 + mb_y * 8 * linesize[1];
1311  dest_cr = s->cur_pic.f->data[2] + mb_x * 8 + mb_y * 8 * linesize[2];
1312  if (!s->cur_pic.f->data[2])
1313  dest_cb = dest_cr = NULL;
1314 
1315  put_dc(s, dest_y, dest_cb, dest_cr, mb_x, mb_y);
1316  }
1317  }
1318 #endif
1319 
1320  if (s->avctx->error_concealment & FF_EC_DEBLOCK) {
1321  /* filter horizontal block boundaries */
1322  h_block_filter(s, s->cur_pic.f->data[0], s->mb_width * 2,
1323  s->mb_height * 2, linesize[0], 1);
1324 
1325  /* filter vertical block boundaries */
1326  v_block_filter(s, s->cur_pic.f->data[0], s->mb_width * 2,
1327  s->mb_height * 2, linesize[0], 1);
1328 
1329  if (s->cur_pic.f->data[2]) {
1330  h_block_filter(s, s->cur_pic.f->data[1], s->mb_width,
1331  s->mb_height, linesize[1], 0);
1332  h_block_filter(s, s->cur_pic.f->data[2], s->mb_width,
1333  s->mb_height, linesize[2], 0);
1334  v_block_filter(s, s->cur_pic.f->data[1], s->mb_width,
1335  s->mb_height, linesize[1], 0);
1336  v_block_filter(s, s->cur_pic.f->data[2], s->mb_width,
1337  s->mb_height, linesize[2], 0);
1338  }
1339  }
1340 
1341 ec_clean:
1342  /* clean a few tables */
1343  for (i = 0; i < s->mb_num; i++) {
1344  const int mb_xy = s->mb_index2xy[i];
1345  int error = s->error_status_table[mb_xy];
1346 
1347  if (s->mbskip_table && s->cur_pic.f->pict_type != AV_PICTURE_TYPE_B &&
1348  (error & (ER_DC_ERROR | ER_MV_ERROR | ER_AC_ERROR))) {
1349  s->mbskip_table[mb_xy] = 0;
1350  }
1351  if (s->mbintra_table)
1352  s->mbintra_table[mb_xy] = 1;
1353  }
1354 
1355  for (i = 0; i < 2; i++) {
1356  av_buffer_unref(&s->ref_index_buf[i]);
1357  av_buffer_unref(&s->motion_val_buf[i]);
1358  s->cur_pic.ref_index[i] = NULL;
1359  s->cur_pic.motion_val[i] = NULL;
1360  }
1361 
1362  memset(&s->cur_pic, 0, sizeof(ERPicture));
1363  memset(&s->last_pic, 0, sizeof(ERPicture));
1364  memset(&s->next_pic, 0, sizeof(ERPicture));
1365 }
ff_me_cmp_init
av_cold void ff_me_cmp_init(MECmpContext *c, AVCodecContext *avctx)
Definition: me_cmp.c:1035
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#define NULL
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void av_buffer_unref(AVBufferRef **buf)
Free a given reference and automatically free the buffer if there are no more references to it...
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h
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Replace the current MB with a flat dc-only version.
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simple horizontal deblocking filter used for error resilience
Definition: error_resilience.c:241
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Wait for earlier decoding threads to finish reference pictures.
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const struct AVHWAccel * hwaccel
Hardware accelerator in use.
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simple vertical deblocking filter used for error resilience
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assert() equivalent, that is always enabled.
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assert() equivalent, that does lie in speed critical code.
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Return a single letter to describe the given picture type pict_type.
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void(* decode_mb)(struct MpegEncContext *s)
Called for every Macroblock in a slice.
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int lowres
low resolution decoding, 1-> 1/2 size, 2->1/4 size
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#define FF_EC_GUESS_MVS
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Libavcodec version macros.
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int width
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#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
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Add a slice.
Definition: error_resilience.c:831
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#define atomic_load(object)
Definition: stdatomic.h:93
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int active_thread_type
Which multithreading methods are in use by the codec.
Definition: avcodec.h:2788
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int error_concealment
error concealment flags
Definition: avcodec.h:2588
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#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
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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)
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#define FFMAX(a, b)
Definition: common.h:94
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#define fail()
Definition: checkasm.h:117
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uint8_t * mbintra_table
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int * mb_index2xy
Definition: error_resilience.h:58
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#define pass
Definition: fft_template.c:593
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static float distance(float x, float y, int band)
Definition: nellymoserenc.c:234
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uint8_t * error_status_table
Definition: error_resilience.h:66
guess_dc
static void guess_dc(ERContext *s, int16_t *dc, int w, int h, ptrdiff_t stride, int is_luma)
guess the dc of blocks which do not have an undamaged dc
Definition: error_resilience.c:138
internal.h
common internal API header
ER_AC_ERROR
#define ER_AC_ERROR
Definition: error_resilience.h:31
rectangle.h
useful rectangle filling function
AV_PICTURE_TYPE_I
Intra.
Definition: avutil.h:274
AVFrame::pict_type
enum AVPictureType pict_type
Picture type of the frame.
Definition: frame.h:301
AVCodecContext::err_recognition
int err_recognition
Error recognition; may misdetect some more or less valid parts as errors.
Definition: avcodec.h:2642
av_assert1
#define av_assert1(cond)
assert() equivalent, that does not lie in speed critical code.
Definition: avassert.h:53
ERContext::er_temp_buffer
uint8_t * er_temp_buffer
Definition: error_resilience.h:67
FFMIN
#define FFMIN(a, b)
Definition: common.h:96
FF_EC_DEBLOCK
#define FF_EC_DEBLOCK
Definition: avcodec.h:2590
w
uint8_t w
Definition: llviddspenc.c:38
ER_DC_END
#define ER_DC_END
Definition: error_resilience.h:35
ERContext::pb_time
uint16_t pb_time
Definition: error_resilience.h:81
FFABS
#define FFABS(a)
Absolute value, Note, INT_MIN / INT64_MIN result in undefined behavior as they are not representable ...
Definition: common.h:72
s
#define s(width, name)
Definition: cbs_vp9.c:257
FF_THREAD_SLICE
#define FF_THREAD_SLICE
Decode more than one part of a single frame at once.
Definition: avcodec.h:2781
AV_EF_EXPLODE
#define AV_EF_EXPLODE
abort decoding on minor error detection
Definition: avcodec.h:2653
n
int n
Definition: avisynth_c.h:684
AVCodecContext::skip_top
int skip_top
Number of macroblock rows at the top which are skipped.
Definition: avcodec.h:2046
AV_CODEC_ID_MPEG2VIDEO
preferred ID for MPEG-1/2 video decoding
Definition: avcodec.h:220
error
static void error(const char *err)
Definition: target_dec_fuzzer.c:64
me_cmp.h
AVFrame::format
int format
format of the frame, -1 if unknown or unset Values correspond to enum AVPixelFormat for video frames...
Definition: frame.h:291
MV_TYPE_16X16
#define MV_TYPE_16X16
1 vector for the whole mb
Definition: mpegvideo.h:266
atomic_fetch_add
#define atomic_fetch_add(object, operand)
Definition: stdatomic.h:131
MV_DIR_BACKWARD
#define MV_DIR_BACKWARD
Definition: mpegvideo.h:263
AV_LOG_INFO
#define AV_LOG_INFO
Standard information.
Definition: log.h:187
avcodec.h
Libavcodec external API header.
AVCodecContext::codec_id
enum AVCodecID codec_id
Definition: avcodec.h:1528
ERContext::next_pic
ERPicture next_pic
Definition: error_resilience.h:75
AVFrame::linesize
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:249
add_blocklist
static av_always_inline void add_blocklist(int(*blocklist)[2], int *blocklist_length, uint8_t *fixed, int mb_x, int mb_y, int mb_xy)
Definition: error_resilience.c:381
AVCodecContext::debug
int debug
debug
Definition: avcodec.h:2598
error_resilience.h
AVBufferRef::data
uint8_t * data
The data buffer.
Definition: buffer.h:89
av_buffer_allocz
AVBufferRef * av_buffer_allocz(int size)
Same as av_buffer_alloc(), except the returned buffer will be initialized to zero.
Definition: buffer.c:83
ERContext::mecc
MECmpContext mecc
Definition: error_resilience.h:55
IS_INTER
#define IS_INTER(a)
Definition: mpegutils.h:79
ER_DC_ERROR
#define ER_DC_ERROR
Definition: error_resilience.h:32
ERContext::avctx
AVCodecContext * avctx
Definition: error_resilience.h:54
weight
static int weight(int i, int blen, int offset)
Definition: diracdec.c:1523
MV_DIR_FORWARD
#define MV_DIR_FORWARD
Definition: mpegvideo.h:262
ERPicture::ref_index
int8_t * ref_index[2]
Definition: error_resilience.h:47
AVCodecContext::skip_bottom
int skip_bottom
Number of macroblock rows at the bottom which are skipped.
Definition: avcodec.h:2053
AVFrame::data
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:232
MECmpContext::sad
me_cmp_func sad[6]
Definition: me_cmp.h:56
FF_EC_FAVOR_INTER
#define FF_EC_FAVOR_INTER
Definition: avcodec.h:2591
int
int
Definition: ffmpeg_filter.c:191
stride
GLint GLenum GLboolean GLsizei stride
Definition: opengl_enc.c:105
ERContext::partitioned_frame
int partitioned_frame
Definition: error_resilience.h:83
if
if(ret< 0)
Definition: vf_mcdeint.c:279
ref
static int ref[MAX_W *MAX_W]
Definition: jpeg2000dwt.c:107
MV_UNCHANGED
#define MV_UNCHANGED
Definition: error_resilience.c:379
c
static double c[64]
Definition: vsrc_mptestsrc.c:87
ERContext::dc_val
int16_t * dc_val[3]
Definition: error_resilience.h:68
AV_PICTURE_TYPE_B
Bi-dir predicted.
Definition: avutil.h:276
ERPicture::f
AVFrame * f
Definition: error_resilience.h:42
ff_crop_tab
#define ff_crop_tab
Definition: motionpixels_tablegen.c:26
IS_INTRA
#define IS_INTRA(x, y)
is_intra_more_likely
static int is_intra_more_likely(ERContext *s)
Definition: error_resilience.c:722
ERContext::mv
int mv[2][4][2]
Definition: error_resilience.h:71
ERPicture::motion_val
int16_t(*[2] motion_val)[2]
Definition: error_resilience.h:46
IS_8X8
#define IS_8X8(a)
Definition: mpegutils.h:89
er_supported
static int er_supported(ERContext *s)
Definition: error_resilience.c:813
dc
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
Definition: audio_convert.c:194
ERContext::error_count
atomic_int error_count
Definition: error_resilience.h:64
ff_er_frame_start
void ff_er_frame_start(ERContext *s)
Definition: error_resilience.c:797
AVFrame::height
int height
Definition: frame.h:276
atomic_init
#define atomic_init(obj, value)
Definition: stdatomic.h:33
av_freep
#define av_freep(p)
Definition: tableprint_vlc.h:35
av_always_inline
#define av_always_inline
Definition: attributes.h:39
ER_AC_END
#define ER_AC_END
Definition: error_resilience.h:34
av_malloc_array
#define av_malloc_array(a, b)
Definition: tableprint_vlc.h:32
FFSWAP
#define FFSWAP(type, a, b)
Definition: common.h:99
stride
#define stride
AVHWAccel::decode_slice
int(* decode_slice)(AVCodecContext *avctx, const uint8_t *buf, uint32_t buf_size)
Callback for each slice.
Definition: avcodec.h:3666
ERContext::mb_stride
ptrdiff_t mb_stride
Definition: error_resilience.h:61
MV_TYPE_8X8
#define MV_TYPE_8X8
4 vectors (H.263, MPEG-4 4MV)
Definition: mpegvideo.h:267
ERContext::mbskip_table
uint8_t * mbskip_table
Definition: error_resilience.h:69
MB_TYPE_L0
#define MB_TYPE_L0
Definition: mpegutils.h:67
a
a
Definition: h264pred_template.c:468
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