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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) {
48  av_assert0(s->quarter_sample);
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  for (i = 0; i < mb_width * mb_height; i++) {
397  const int mb_xy = s->mb_index2xy[i];
398  int f = 0;
399  int error = s->error_status_table[mb_xy];
400 
401  if (IS_INTRA(s->cur_pic.mb_type[mb_xy]))
402  f = MV_FROZEN; // intra // FIXME check
403  if (!(error & ER_MV_ERROR))
404  f = MV_FROZEN; // inter with undamaged MV
405 
406  fixed[mb_xy] = f;
407  if (f == MV_FROZEN)
408  num_avail++;
409  else if(s->last_pic.f->data[0] && s->last_pic.motion_val[0]){
410  const int mb_y= mb_xy / s->mb_stride;
411  const int mb_x= mb_xy % s->mb_stride;
412  const int mot_index= (mb_x + mb_y*mot_stride) * mot_step;
413  s->cur_pic.motion_val[0][mot_index][0]= s->last_pic.motion_val[0][mot_index][0];
414  s->cur_pic.motion_val[0][mot_index][1]= s->last_pic.motion_val[0][mot_index][1];
415  s->cur_pic.ref_index[0][4*mb_xy] = s->last_pic.ref_index[0][4*mb_xy];
416  }
417  }
418 
419  if ((!(s->avctx->error_concealment&FF_EC_GUESS_MVS)) ||
420  num_avail <= mb_width / 2) {
421  for (mb_y = 0; mb_y < mb_height; mb_y++) {
422  for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
423  const int mb_xy = mb_x + mb_y * s->mb_stride;
424  int mv_dir = (s->last_pic.f && s->last_pic.f->data[0]) ? MV_DIR_FORWARD : MV_DIR_BACKWARD;
425 
426  if (IS_INTRA(s->cur_pic.mb_type[mb_xy]))
427  continue;
428  if (!(s->error_status_table[mb_xy] & ER_MV_ERROR))
429  continue;
430 
431  s->mv[0][0][0] = 0;
432  s->mv[0][0][1] = 0;
433  s->decode_mb(s->opaque, 0, mv_dir, MV_TYPE_16X16, &s->mv,
434  mb_x, mb_y, 0, 0);
435  }
436  }
437  return;
438  }
439 
440  for (depth = 0; ; depth++) {
441  int changed, pass, none_left;
442 
443  none_left = 1;
444  changed = 1;
445  for (pass = 0; (changed || pass < 2) && pass < 10; pass++) {
446  int mb_x, mb_y;
447  int score_sum = 0;
448 
449  changed = 0;
450  for (mb_y = 0; mb_y < mb_height; mb_y++) {
451  for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
452  const int mb_xy = mb_x + mb_y * s->mb_stride;
453  int mv_predictor[8][2] = { { 0 } };
454  int ref[8] = { 0 };
455  int pred_count = 0;
456  int j;
457  int best_score = 256 * 256 * 256 * 64;
458  int best_pred = 0;
459  const int mot_index = (mb_x + mb_y * mot_stride) * mot_step;
460  int prev_x = 0, prev_y = 0, prev_ref = 0;
461 
462  if ((mb_x ^ mb_y ^ pass) & 1)
463  continue;
464 
465  if (fixed[mb_xy] == MV_FROZEN)
466  continue;
467  av_assert1(!IS_INTRA(s->cur_pic.mb_type[mb_xy]));
468  av_assert1(s->last_pic.f && s->last_pic.f->data[0]);
469 
470  j = 0;
471  if (mb_x > 0 && fixed[mb_xy - 1] == MV_FROZEN)
472  j = 1;
473  if (mb_x + 1 < mb_width && fixed[mb_xy + 1] == MV_FROZEN)
474  j = 1;
475  if (mb_y > 0 && fixed[mb_xy - mb_stride] == MV_FROZEN)
476  j = 1;
477  if (mb_y + 1 < mb_height && fixed[mb_xy + mb_stride] == MV_FROZEN)
478  j = 1;
479  if (j == 0)
480  continue;
481 
482  j = 0;
483  if (mb_x > 0 && fixed[mb_xy - 1 ] == MV_CHANGED)
484  j = 1;
485  if (mb_x + 1 < mb_width && fixed[mb_xy + 1 ] == MV_CHANGED)
486  j = 1;
487  if (mb_y > 0 && fixed[mb_xy - mb_stride] == MV_CHANGED)
488  j = 1;
489  if (mb_y + 1 < mb_height && fixed[mb_xy + mb_stride] == MV_CHANGED)
490  j = 1;
491  if (j == 0 && pass > 1)
492  continue;
493 
494  none_left = 0;
495 
496  if (mb_x > 0 && fixed[mb_xy - 1]) {
497  mv_predictor[pred_count][0] =
498  s->cur_pic.motion_val[0][mot_index - mot_step][0];
499  mv_predictor[pred_count][1] =
500  s->cur_pic.motion_val[0][mot_index - mot_step][1];
501  ref[pred_count] =
502  s->cur_pic.ref_index[0][4 * (mb_xy - 1)];
503  pred_count++;
504  }
505  if (mb_x + 1 < mb_width && fixed[mb_xy + 1]) {
506  mv_predictor[pred_count][0] =
507  s->cur_pic.motion_val[0][mot_index + mot_step][0];
508  mv_predictor[pred_count][1] =
509  s->cur_pic.motion_val[0][mot_index + mot_step][1];
510  ref[pred_count] =
511  s->cur_pic.ref_index[0][4 * (mb_xy + 1)];
512  pred_count++;
513  }
514  if (mb_y > 0 && fixed[mb_xy - mb_stride]) {
515  mv_predictor[pred_count][0] =
516  s->cur_pic.motion_val[0][mot_index - mot_stride * mot_step][0];
517  mv_predictor[pred_count][1] =
518  s->cur_pic.motion_val[0][mot_index - mot_stride * mot_step][1];
519  ref[pred_count] =
520  s->cur_pic.ref_index[0][4 * (mb_xy - s->mb_stride)];
521  pred_count++;
522  }
523  if (mb_y + 1<mb_height && fixed[mb_xy + mb_stride]) {
524  mv_predictor[pred_count][0] =
525  s->cur_pic.motion_val[0][mot_index + mot_stride * mot_step][0];
526  mv_predictor[pred_count][1] =
527  s->cur_pic.motion_val[0][mot_index + mot_stride * mot_step][1];
528  ref[pred_count] =
529  s->cur_pic.ref_index[0][4 * (mb_xy + s->mb_stride)];
530  pred_count++;
531  }
532  if (pred_count == 0)
533  continue;
534 
535  if (pred_count > 1) {
536  int sum_x = 0, sum_y = 0, sum_r = 0;
537  int max_x, max_y, min_x, min_y, max_r, min_r;
538 
539  for (j = 0; j < pred_count; j++) {
540  sum_x += mv_predictor[j][0];
541  sum_y += mv_predictor[j][1];
542  sum_r += ref[j];
543  if (j && ref[j] != ref[j - 1])
544  goto skip_mean_and_median;
545  }
546 
547  /* mean */
548  mv_predictor[pred_count][0] = sum_x / j;
549  mv_predictor[pred_count][1] = sum_y / j;
550  ref[pred_count] = sum_r / j;
551 
552  /* median */
553  if (pred_count >= 3) {
554  min_y = min_x = min_r = 99999;
555  max_y = max_x = max_r = -99999;
556  } else {
557  min_x = min_y = max_x = max_y = min_r = max_r = 0;
558  }
559  for (j = 0; j < pred_count; j++) {
560  max_x = FFMAX(max_x, mv_predictor[j][0]);
561  max_y = FFMAX(max_y, mv_predictor[j][1]);
562  max_r = FFMAX(max_r, ref[j]);
563  min_x = FFMIN(min_x, mv_predictor[j][0]);
564  min_y = FFMIN(min_y, mv_predictor[j][1]);
565  min_r = FFMIN(min_r, ref[j]);
566  }
567  mv_predictor[pred_count + 1][0] = sum_x - max_x - min_x;
568  mv_predictor[pred_count + 1][1] = sum_y - max_y - min_y;
569  ref[pred_count + 1] = sum_r - max_r - min_r;
570 
571  if (pred_count == 4) {
572  mv_predictor[pred_count + 1][0] /= 2;
573  mv_predictor[pred_count + 1][1] /= 2;
574  ref[pred_count + 1] /= 2;
575  }
576  pred_count += 2;
577  }
578 
579 skip_mean_and_median:
580  /* zero MV */
581  pred_count++;
582 
583  if (!fixed[mb_xy] && 0) {
584  if (s->avctx->codec_id == AV_CODEC_ID_H264) {
585  // FIXME
586  } else {
587  ff_thread_await_progress(s->last_pic.tf,
588  mb_y, 0);
589  }
590  if (!s->last_pic.motion_val[0] ||
591  !s->last_pic.ref_index[0])
592  goto skip_last_mv;
593  prev_x = s->last_pic.motion_val[0][mot_index][0];
594  prev_y = s->last_pic.motion_val[0][mot_index][1];
595  prev_ref = s->last_pic.ref_index[0][4 * mb_xy];
596  } else {
597  prev_x = s->cur_pic.motion_val[0][mot_index][0];
598  prev_y = s->cur_pic.motion_val[0][mot_index][1];
599  prev_ref = s->cur_pic.ref_index[0][4 * mb_xy];
600  }
601 
602  /* last MV */
603  mv_predictor[pred_count][0] = prev_x;
604  mv_predictor[pred_count][1] = prev_y;
605  ref[pred_count] = prev_ref;
606  pred_count++;
607 
608 skip_last_mv:
609 
610  for (j = 0; j < pred_count; j++) {
611  int *linesize = s->cur_pic.f->linesize;
612  int score = 0;
613  uint8_t *src = s->cur_pic.f->data[0] +
614  mb_x * 16 + mb_y * 16 * linesize[0];
615 
616  s->cur_pic.motion_val[0][mot_index][0] =
617  s->mv[0][0][0] = mv_predictor[j][0];
618  s->cur_pic.motion_val[0][mot_index][1] =
619  s->mv[0][0][1] = mv_predictor[j][1];
620 
621  // predictor intra or otherwise not available
622  if (ref[j] < 0)
623  continue;
624 
625  s->decode_mb(s->opaque, ref[j], MV_DIR_FORWARD,
626  MV_TYPE_16X16, &s->mv, mb_x, mb_y, 0, 0);
627 
628  if (mb_x > 0 && fixed[mb_xy - 1]) {
629  int k;
630  for (k = 0; k < 16; k++)
631  score += FFABS(src[k * linesize[0] - 1] -
632  src[k * linesize[0]]);
633  }
634  if (mb_x + 1 < mb_width && fixed[mb_xy + 1]) {
635  int k;
636  for (k = 0; k < 16; k++)
637  score += FFABS(src[k * linesize[0] + 15] -
638  src[k * linesize[0] + 16]);
639  }
640  if (mb_y > 0 && fixed[mb_xy - mb_stride]) {
641  int k;
642  for (k = 0; k < 16; k++)
643  score += FFABS(src[k - linesize[0]] - src[k]);
644  }
645  if (mb_y + 1 < mb_height && fixed[mb_xy + mb_stride]) {
646  int k;
647  for (k = 0; k < 16; k++)
648  score += FFABS(src[k + linesize[0] * 15] -
649  src[k + linesize[0] * 16]);
650  }
651 
652  if (score <= best_score) { // <= will favor the last MV
653  best_score = score;
654  best_pred = j;
655  }
656  }
657  score_sum += best_score;
658  s->mv[0][0][0] = mv_predictor[best_pred][0];
659  s->mv[0][0][1] = mv_predictor[best_pred][1];
660 
661  for (i = 0; i < mot_step; i++)
662  for (j = 0; j < mot_step; j++) {
663  s->cur_pic.motion_val[0][mot_index + i + j * mot_stride][0] = s->mv[0][0][0];
664  s->cur_pic.motion_val[0][mot_index + i + j * mot_stride][1] = s->mv[0][0][1];
665  }
666 
667  s->decode_mb(s->opaque, ref[best_pred], MV_DIR_FORWARD,
668  MV_TYPE_16X16, &s->mv, mb_x, mb_y, 0, 0);
669 
670 
671  if (s->mv[0][0][0] != prev_x || s->mv[0][0][1] != prev_y) {
672  fixed[mb_xy] = MV_CHANGED;
673  changed++;
674  } else
675  fixed[mb_xy] = MV_UNCHANGED;
676  }
677  }
678  }
679 
680  if (none_left)
681  return;
682 
683  for (i = 0; i < mb_width * mb_height; i++) {
684  int mb_xy = s->mb_index2xy[i];
685  if (fixed[mb_xy])
686  fixed[mb_xy] = MV_FROZEN;
687  }
688  }
689 }
690 
691 static int is_intra_more_likely(ERContext *s)
692 {
693  int is_intra_likely, i, j, undamaged_count, skip_amount, mb_x, mb_y;
694 
695  if (!s->last_pic.f || !s->last_pic.f->data[0])
696  return 1; // no previous frame available -> use spatial prediction
697 
698  if (s->avctx->error_concealment & FF_EC_FAVOR_INTER)
699  return 0;
700 
701  undamaged_count = 0;
702  for (i = 0; i < s->mb_num; i++) {
703  const int mb_xy = s->mb_index2xy[i];
704  const int error = s->error_status_table[mb_xy];
705  if (!((error & ER_DC_ERROR) && (error & ER_MV_ERROR)))
706  undamaged_count++;
707  }
708 
709  if (undamaged_count < 5)
710  return 0; // almost all MBs damaged -> use temporal prediction
711 
712  // prevent dsp.sad() check, that requires access to the image
713  if (CONFIG_XVMC &&
714  s->avctx->hwaccel && s->avctx->hwaccel->decode_mb &&
715  s->cur_pic.f->pict_type == AV_PICTURE_TYPE_I)
716  return 1;
717 
718  skip_amount = FFMAX(undamaged_count / 50, 1); // check only up to 50 MBs
719  is_intra_likely = 0;
720 
721  j = 0;
722  for (mb_y = 0; mb_y < s->mb_height - 1; mb_y++) {
723  for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
724  int error;
725  const int mb_xy = mb_x + mb_y * s->mb_stride;
726 
727  error = s->error_status_table[mb_xy];
728  if ((error & ER_DC_ERROR) && (error & ER_MV_ERROR))
729  continue; // skip damaged
730 
731  j++;
732  // skip a few to speed things up
733  if ((j % skip_amount) != 0)
734  continue;
735 
736  if (s->cur_pic.f->pict_type == AV_PICTURE_TYPE_I) {
737  int *linesize = s->cur_pic.f->linesize;
738  uint8_t *mb_ptr = s->cur_pic.f->data[0] +
739  mb_x * 16 + mb_y * 16 * linesize[0];
740  uint8_t *last_mb_ptr = s->last_pic.f->data[0] +
741  mb_x * 16 + mb_y * 16 * linesize[0];
742 
743  if (s->avctx->codec_id == AV_CODEC_ID_H264) {
744  // FIXME
745  } else {
746  ff_thread_await_progress(s->last_pic.tf, mb_y, 0);
747  }
748  is_intra_likely += s->mecc.sad[0](NULL, last_mb_ptr, mb_ptr,
749  linesize[0], 16);
750  // FIXME need await_progress() here
751  is_intra_likely -= s->mecc.sad[0](NULL, last_mb_ptr,
752  last_mb_ptr + linesize[0] * 16,
753  linesize[0], 16);
754  } else {
755  if (IS_INTRA(s->cur_pic.mb_type[mb_xy]))
756  is_intra_likely++;
757  else
758  is_intra_likely--;
759  }
760  }
761  }
762 // av_log(NULL, AV_LOG_ERROR, "is_intra_likely: %d type:%d\n", is_intra_likely, s->pict_type);
763  return is_intra_likely > 0;
764 }
765 
766 void ff_er_frame_start(ERContext *s)
767 {
768  if (!s->avctx->error_concealment)
769  return;
770 
771  if (!s->mecc_inited) {
772  ff_me_cmp_init(&s->mecc, s->avctx);
773  s->mecc_inited = 1;
774  }
775 
776  memset(s->error_status_table, ER_MB_ERROR | VP_START | ER_MB_END,
777  s->mb_stride * s->mb_height * sizeof(uint8_t));
778  s->error_count = 3 * s->mb_num;
779  s->error_occurred = 0;
780 }
781 
782 static int er_supported(ERContext *s)
783 {
784  if(s->avctx->hwaccel && s->avctx->hwaccel->decode_slice ||
785 #if FF_API_CAP_VDPAU
786  s->avctx->codec->capabilities&AV_CODEC_CAP_HWACCEL_VDPAU ||
787 #endif
788  !s->cur_pic.f ||
789  s->cur_pic.field_picture
790  )
791  return 0;
792  return 1;
793 }
794 
795 /**
796  * Add a slice.
797  * @param endx x component of the last macroblock, can be -1
798  * for the last of the previous line
799  * @param status the status at the end (ER_MV_END, ER_AC_ERROR, ...), it is
800  * assumed that no earlier end or error of the same type occurred
801  */
802 void ff_er_add_slice(ERContext *s, int startx, int starty,
803  int endx, int endy, int status)
804 {
805  const int start_i = av_clip(startx + starty * s->mb_width, 0, s->mb_num - 1);
806  const int end_i = av_clip(endx + endy * s->mb_width, 0, s->mb_num);
807  const int start_xy = s->mb_index2xy[start_i];
808  const int end_xy = s->mb_index2xy[end_i];
809  int mask = -1;
810 
811  if (s->avctx->hwaccel && s->avctx->hwaccel->decode_slice)
812  return;
813 
814  if (start_i > end_i || start_xy > end_xy) {
815  av_log(s->avctx, AV_LOG_ERROR,
816  "internal error, slice end before start\n");
817  return;
818  }
819 
820  if (!s->avctx->error_concealment)
821  return;
822 
823  mask &= ~VP_START;
824  if (status & (ER_AC_ERROR | ER_AC_END)) {
825  mask &= ~(ER_AC_ERROR | ER_AC_END);
826  avpriv_atomic_int_add_and_fetch(&s->error_count, start_i - end_i - 1);
827  }
828  if (status & (ER_DC_ERROR | ER_DC_END)) {
829  mask &= ~(ER_DC_ERROR | ER_DC_END);
830  avpriv_atomic_int_add_and_fetch(&s->error_count, start_i - end_i - 1);
831  }
832  if (status & (ER_MV_ERROR | ER_MV_END)) {
833  mask &= ~(ER_MV_ERROR | ER_MV_END);
834  avpriv_atomic_int_add_and_fetch(&s->error_count, start_i - end_i - 1);
835  }
836 
837  if (status & ER_MB_ERROR) {
838  s->error_occurred = 1;
839  avpriv_atomic_int_set(&s->error_count, INT_MAX);
840  }
841 
842  if (mask == ~0x7F) {
843  memset(&s->error_status_table[start_xy], 0,
844  (end_xy - start_xy) * sizeof(uint8_t));
845  } else {
846  int i;
847  for (i = start_xy; i < end_xy; i++)
848  s->error_status_table[i] &= mask;
849  }
850 
851  if (end_i == s->mb_num)
852  avpriv_atomic_int_set(&s->error_count, INT_MAX);
853  else {
854  s->error_status_table[end_xy] &= mask;
855  s->error_status_table[end_xy] |= status;
856  }
857 
858  s->error_status_table[start_xy] |= VP_START;
859 
860  if (start_xy > 0 && !(s->avctx->active_thread_type & FF_THREAD_SLICE) &&
861  er_supported(s) && s->avctx->skip_top * s->mb_width < start_i) {
862  int prev_status = s->error_status_table[s->mb_index2xy[start_i - 1]];
863 
864  prev_status &= ~ VP_START;
865  if (prev_status != (ER_MV_END | ER_DC_END | ER_AC_END)) {
866  s->error_occurred = 1;
867  avpriv_atomic_int_set(&s->error_count, INT_MAX);
868  }
869  }
870 }
871 
872 void ff_er_frame_end(ERContext *s)
873 {
874  int *linesize = NULL;
875  int i, mb_x, mb_y, error, error_type, dc_error, mv_error, ac_error;
876  int distance;
877  int threshold_part[4] = { 100, 100, 100 };
878  int threshold = 50;
879  int is_intra_likely;
880  int size = s->b8_stride * 2 * s->mb_height;
881 
882  /* We do not support ER of field pictures yet,
883  * though it should not crash if enabled. */
884  if (!s->avctx->error_concealment || s->error_count == 0 ||
885  s->avctx->lowres ||
886  !er_supported(s) ||
887  s->error_count == 3 * s->mb_width *
888  (s->avctx->skip_top + s->avctx->skip_bottom)) {
889  return;
890  }
891  linesize = s->cur_pic.f->linesize;
892  for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
893  int status = s->error_status_table[mb_x + (s->mb_height - 1) * s->mb_stride];
894  if (status != 0x7F)
895  break;
896  }
897 
898  if ( mb_x == s->mb_width
899  && s->avctx->codec_id == AV_CODEC_ID_MPEG2VIDEO
900  && (s->avctx->height&16)
901  && s->error_count == 3 * s->mb_width * (s->avctx->skip_top + s->avctx->skip_bottom + 1)
902  ) {
903  av_log(s->avctx, AV_LOG_DEBUG, "ignoring last missing slice\n");
904  return;
905  }
906 
907  if (s->last_pic.f) {
908  if (s->last_pic.f->width != s->cur_pic.f->width ||
909  s->last_pic.f->height != s->cur_pic.f->height ||
910  s->last_pic.f->format != s->cur_pic.f->format) {
911  av_log(s->avctx, AV_LOG_WARNING, "Cannot use previous picture in error concealment\n");
912  memset(&s->last_pic, 0, sizeof(s->last_pic));
913  }
914  }
915  if (s->next_pic.f) {
916  if (s->next_pic.f->width != s->cur_pic.f->width ||
917  s->next_pic.f->height != s->cur_pic.f->height ||
918  s->next_pic.f->format != s->cur_pic.f->format) {
919  av_log(s->avctx, AV_LOG_WARNING, "Cannot use next picture in error concealment\n");
920  memset(&s->next_pic, 0, sizeof(s->next_pic));
921  }
922  }
923 
924  if (!s->cur_pic.motion_val[0] || !s->cur_pic.ref_index[0]) {
925  av_log(s->avctx, AV_LOG_ERROR, "Warning MVs not available\n");
926 
927  for (i = 0; i < 2; i++) {
928  s->ref_index_buf[i] = av_buffer_allocz(s->mb_stride * s->mb_height * 4 * sizeof(uint8_t));
929  s->motion_val_buf[i] = av_buffer_allocz((size + 4) * 2 * sizeof(uint16_t));
930  if (!s->ref_index_buf[i] || !s->motion_val_buf[i])
931  break;
932  s->cur_pic.ref_index[i] = s->ref_index_buf[i]->data;
933  s->cur_pic.motion_val[i] = (int16_t (*)[2])s->motion_val_buf[i]->data + 4;
934  }
935  if (i < 2) {
936  for (i = 0; i < 2; i++) {
937  av_buffer_unref(&s->ref_index_buf[i]);
938  av_buffer_unref(&s->motion_val_buf[i]);
939  s->cur_pic.ref_index[i] = NULL;
940  s->cur_pic.motion_val[i] = NULL;
941  }
942  return;
943  }
944  }
945 
946  if (s->avctx->debug & FF_DEBUG_ER) {
947  for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
948  for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
949  int status = s->error_status_table[mb_x + mb_y * s->mb_stride];
950 
951  av_log(s->avctx, AV_LOG_DEBUG, "%2X ", status);
952  }
953  av_log(s->avctx, AV_LOG_DEBUG, "\n");
954  }
955  }
956 
957 #if 1
958  /* handle overlapping slices */
959  for (error_type = 1; error_type <= 3; error_type++) {
960  int end_ok = 0;
961 
962  for (i = s->mb_num - 1; i >= 0; i--) {
963  const int mb_xy = s->mb_index2xy[i];
964  int error = s->error_status_table[mb_xy];
965 
966  if (error & (1 << error_type))
967  end_ok = 1;
968  if (error & (8 << error_type))
969  end_ok = 1;
970 
971  if (!end_ok)
972  s->error_status_table[mb_xy] |= 1 << error_type;
973 
974  if (error & VP_START)
975  end_ok = 0;
976  }
977  }
978 #endif
979 #if 1
980  /* handle slices with partitions of different length */
981  if (s->partitioned_frame) {
982  int end_ok = 0;
983 
984  for (i = s->mb_num - 1; i >= 0; i--) {
985  const int mb_xy = s->mb_index2xy[i];
986  int error = s->error_status_table[mb_xy];
987 
988  if (error & ER_AC_END)
989  end_ok = 0;
990  if ((error & ER_MV_END) ||
991  (error & ER_DC_END) ||
992  (error & ER_AC_ERROR))
993  end_ok = 1;
994 
995  if (!end_ok)
996  s->error_status_table[mb_xy]|= ER_AC_ERROR;
997 
998  if (error & VP_START)
999  end_ok = 0;
1000  }
1001  }
1002 #endif
1003  /* handle missing slices */
1004  if (s->avctx->err_recognition & AV_EF_EXPLODE) {
1005  int end_ok = 1;
1006 
1007  // FIXME + 100 hack
1008  for (i = s->mb_num - 2; i >= s->mb_width + 100; i--) {
1009  const int mb_xy = s->mb_index2xy[i];
1010  int error1 = s->error_status_table[mb_xy];
1011  int error2 = s->error_status_table[s->mb_index2xy[i + 1]];
1012 
1013  if (error1 & VP_START)
1014  end_ok = 1;
1015 
1016  if (error2 == (VP_START | ER_MB_ERROR | ER_MB_END) &&
1017  error1 != (VP_START | ER_MB_ERROR | ER_MB_END) &&
1018  ((error1 & ER_AC_END) || (error1 & ER_DC_END) ||
1019  (error1 & ER_MV_END))) {
1020  // end & uninit
1021  end_ok = 0;
1022  }
1023 
1024  if (!end_ok)
1025  s->error_status_table[mb_xy] |= ER_MB_ERROR;
1026  }
1027  }
1028 
1029 #if 1
1030  /* backward mark errors */
1031  distance = 9999999;
1032  for (error_type = 1; error_type <= 3; error_type++) {
1033  for (i = s->mb_num - 1; i >= 0; i--) {
1034  const int mb_xy = s->mb_index2xy[i];
1035  int error = s->error_status_table[mb_xy];
1036 
1037  if (!s->mbskip_table || !s->mbskip_table[mb_xy]) // FIXME partition specific
1038  distance++;
1039  if (error & (1 << error_type))
1040  distance = 0;
1041 
1042  if (s->partitioned_frame) {
1043  if (distance < threshold_part[error_type - 1])
1044  s->error_status_table[mb_xy] |= 1 << error_type;
1045  } else {
1046  if (distance < threshold)
1047  s->error_status_table[mb_xy] |= 1 << error_type;
1048  }
1049 
1050  if (error & VP_START)
1051  distance = 9999999;
1052  }
1053  }
1054 #endif
1055 
1056  /* forward mark errors */
1057  error = 0;
1058  for (i = 0; i < s->mb_num; i++) {
1059  const int mb_xy = s->mb_index2xy[i];
1060  int old_error = s->error_status_table[mb_xy];
1061 
1062  if (old_error & VP_START) {
1063  error = old_error & ER_MB_ERROR;
1064  } else {
1065  error |= old_error & ER_MB_ERROR;
1066  s->error_status_table[mb_xy] |= error;
1067  }
1068  }
1069 #if 1
1070  /* handle not partitioned case */
1071  if (!s->partitioned_frame) {
1072  for (i = 0; i < s->mb_num; i++) {
1073  const int mb_xy = s->mb_index2xy[i];
1074  int error = s->error_status_table[mb_xy];
1075  if (error & ER_MB_ERROR)
1076  error |= ER_MB_ERROR;
1077  s->error_status_table[mb_xy] = error;
1078  }
1079  }
1080 #endif
1081 
1082  dc_error = ac_error = mv_error = 0;
1083  for (i = 0; i < s->mb_num; i++) {
1084  const int mb_xy = s->mb_index2xy[i];
1085  int error = s->error_status_table[mb_xy];
1086  if (error & ER_DC_ERROR)
1087  dc_error++;
1088  if (error & ER_AC_ERROR)
1089  ac_error++;
1090  if (error & ER_MV_ERROR)
1091  mv_error++;
1092  }
1093  av_log(s->avctx, AV_LOG_INFO, "concealing %d DC, %d AC, %d MV errors in %c frame\n",
1094  dc_error, ac_error, mv_error, av_get_picture_type_char(s->cur_pic.f->pict_type));
1095 
1096  is_intra_likely = is_intra_more_likely(s);
1097 
1098  /* set unknown mb-type to most likely */
1099  for (i = 0; i < s->mb_num; i++) {
1100  const int mb_xy = s->mb_index2xy[i];
1101  int error = s->error_status_table[mb_xy];
1102  if (!((error & ER_DC_ERROR) && (error & ER_MV_ERROR)))
1103  continue;
1104 
1105  if (is_intra_likely)
1106  s->cur_pic.mb_type[mb_xy] = MB_TYPE_INTRA4x4;
1107  else
1108  s->cur_pic.mb_type[mb_xy] = MB_TYPE_16x16 | MB_TYPE_L0;
1109  }
1110 
1111  // change inter to intra blocks if no reference frames are available
1112  if (!(s->last_pic.f && s->last_pic.f->data[0]) &&
1113  !(s->next_pic.f && s->next_pic.f->data[0]))
1114  for (i = 0; i < s->mb_num; i++) {
1115  const int mb_xy = s->mb_index2xy[i];
1116  if (!IS_INTRA(s->cur_pic.mb_type[mb_xy]))
1117  s->cur_pic.mb_type[mb_xy] = MB_TYPE_INTRA4x4;
1118  }
1119 
1120  /* handle inter blocks with damaged AC */
1121  for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1122  for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1123  const int mb_xy = mb_x + mb_y * s->mb_stride;
1124  const int mb_type = s->cur_pic.mb_type[mb_xy];
1125  const int dir = !(s->last_pic.f && s->last_pic.f->data[0]);
1126  const int mv_dir = dir ? MV_DIR_BACKWARD : MV_DIR_FORWARD;
1127  int mv_type;
1128 
1129  int error = s->error_status_table[mb_xy];
1130 
1131  if (IS_INTRA(mb_type))
1132  continue; // intra
1133  if (error & ER_MV_ERROR)
1134  continue; // inter with damaged MV
1135  if (!(error & ER_AC_ERROR))
1136  continue; // undamaged inter
1137 
1138  if (IS_8X8(mb_type)) {
1139  int mb_index = mb_x * 2 + mb_y * 2 * s->b8_stride;
1140  int j;
1141  mv_type = MV_TYPE_8X8;
1142  for (j = 0; j < 4; j++) {
1143  s->mv[0][j][0] = s->cur_pic.motion_val[dir][mb_index + (j & 1) + (j >> 1) * s->b8_stride][0];
1144  s->mv[0][j][1] = s->cur_pic.motion_val[dir][mb_index + (j & 1) + (j >> 1) * s->b8_stride][1];
1145  }
1146  } else {
1147  mv_type = MV_TYPE_16X16;
1148  s->mv[0][0][0] = s->cur_pic.motion_val[dir][mb_x * 2 + mb_y * 2 * s->b8_stride][0];
1149  s->mv[0][0][1] = s->cur_pic.motion_val[dir][mb_x * 2 + mb_y * 2 * s->b8_stride][1];
1150  }
1151 
1152  s->decode_mb(s->opaque, 0 /* FIXME h264 partitioned slices need this set */,
1153  mv_dir, mv_type, &s->mv, mb_x, mb_y, 0, 0);
1154  }
1155  }
1156 
1157  /* guess MVs */
1158  if (s->cur_pic.f->pict_type == AV_PICTURE_TYPE_B) {
1159  for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1160  for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1161  int xy = mb_x * 2 + mb_y * 2 * s->b8_stride;
1162  const int mb_xy = mb_x + mb_y * s->mb_stride;
1163  const int mb_type = s->cur_pic.mb_type[mb_xy];
1164  int mv_dir = MV_DIR_FORWARD | MV_DIR_BACKWARD;
1165 
1166  int error = s->error_status_table[mb_xy];
1167 
1168  if (IS_INTRA(mb_type))
1169  continue;
1170  if (!(error & ER_MV_ERROR))
1171  continue; // inter with undamaged MV
1172  if (!(error & ER_AC_ERROR))
1173  continue; // undamaged inter
1174 
1175  if (!(s->last_pic.f && s->last_pic.f->data[0]))
1176  mv_dir &= ~MV_DIR_FORWARD;
1177  if (!(s->next_pic.f && s->next_pic.f->data[0]))
1178  mv_dir &= ~MV_DIR_BACKWARD;
1179 
1180  if (s->pp_time) {
1181  int time_pp = s->pp_time;
1182  int time_pb = s->pb_time;
1183 
1184  av_assert0(s->avctx->codec_id != AV_CODEC_ID_H264);
1185  ff_thread_await_progress(s->next_pic.tf, mb_y, 0);
1186 
1187  s->mv[0][0][0] = s->next_pic.motion_val[0][xy][0] * time_pb / time_pp;
1188  s->mv[0][0][1] = s->next_pic.motion_val[0][xy][1] * time_pb / time_pp;
1189  s->mv[1][0][0] = s->next_pic.motion_val[0][xy][0] * (time_pb - time_pp) / time_pp;
1190  s->mv[1][0][1] = s->next_pic.motion_val[0][xy][1] * (time_pb - time_pp) / time_pp;
1191  } else {
1192  s->mv[0][0][0] = 0;
1193  s->mv[0][0][1] = 0;
1194  s->mv[1][0][0] = 0;
1195  s->mv[1][0][1] = 0;
1196  }
1197 
1198  s->decode_mb(s->opaque, 0, mv_dir, MV_TYPE_16X16, &s->mv,
1199  mb_x, mb_y, 0, 0);
1200  }
1201  }
1202  } else
1203  guess_mv(s);
1204 
1205  /* the filters below manipulate raw image, skip them */
1206  if (CONFIG_XVMC && s->avctx->hwaccel && s->avctx->hwaccel->decode_mb)
1207  goto ec_clean;
1208  /* fill DC for inter blocks */
1209  for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1210  for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1211  int dc, dcu, dcv, y, n;
1212  int16_t *dc_ptr;
1213  uint8_t *dest_y, *dest_cb, *dest_cr;
1214  const int mb_xy = mb_x + mb_y * s->mb_stride;
1215  const int mb_type = s->cur_pic.mb_type[mb_xy];
1216 
1217  // error = s->error_status_table[mb_xy];
1218 
1219  if (IS_INTRA(mb_type) && s->partitioned_frame)
1220  continue;
1221  // if (error & ER_MV_ERROR)
1222  // continue; // inter data damaged FIXME is this good?
1223 
1224  dest_y = s->cur_pic.f->data[0] + mb_x * 16 + mb_y * 16 * linesize[0];
1225  dest_cb = s->cur_pic.f->data[1] + mb_x * 8 + mb_y * 8 * linesize[1];
1226  dest_cr = s->cur_pic.f->data[2] + mb_x * 8 + mb_y * 8 * linesize[2];
1227 
1228  dc_ptr = &s->dc_val[0][mb_x * 2 + mb_y * 2 * s->b8_stride];
1229  for (n = 0; n < 4; n++) {
1230  dc = 0;
1231  for (y = 0; y < 8; y++) {
1232  int x;
1233  for (x = 0; x < 8; x++)
1234  dc += dest_y[x + (n & 1) * 8 +
1235  (y + (n >> 1) * 8) * linesize[0]];
1236  }
1237  dc_ptr[(n & 1) + (n >> 1) * s->b8_stride] = (dc + 4) >> 3;
1238  }
1239 
1240  if (!s->cur_pic.f->data[2])
1241  continue;
1242 
1243  dcu = dcv = 0;
1244  for (y = 0; y < 8; y++) {
1245  int x;
1246  for (x = 0; x < 8; x++) {
1247  dcu += dest_cb[x + y * linesize[1]];
1248  dcv += dest_cr[x + y * linesize[2]];
1249  }
1250  }
1251  s->dc_val[1][mb_x + mb_y * s->mb_stride] = (dcu + 4) >> 3;
1252  s->dc_val[2][mb_x + mb_y * s->mb_stride] = (dcv + 4) >> 3;
1253  }
1254  }
1255 #if 1
1256  /* guess DC for damaged blocks */
1257  guess_dc(s, s->dc_val[0], s->mb_width*2, s->mb_height*2, s->b8_stride, 1);
1258  guess_dc(s, s->dc_val[1], s->mb_width , s->mb_height , s->mb_stride, 0);
1259  guess_dc(s, s->dc_val[2], s->mb_width , s->mb_height , s->mb_stride, 0);
1260 #endif
1261 
1262  /* filter luma DC */
1263  filter181(s->dc_val[0], s->mb_width * 2, s->mb_height * 2, s->b8_stride);
1264 
1265 #if 1
1266  /* render DC only intra */
1267  for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1268  for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1269  uint8_t *dest_y, *dest_cb, *dest_cr;
1270  const int mb_xy = mb_x + mb_y * s->mb_stride;
1271  const int mb_type = s->cur_pic.mb_type[mb_xy];
1272 
1273  int error = s->error_status_table[mb_xy];
1274 
1275  if (IS_INTER(mb_type))
1276  continue;
1277  if (!(error & ER_AC_ERROR))
1278  continue; // undamaged
1279 
1280  dest_y = s->cur_pic.f->data[0] + mb_x * 16 + mb_y * 16 * linesize[0];
1281  dest_cb = s->cur_pic.f->data[1] + mb_x * 8 + mb_y * 8 * linesize[1];
1282  dest_cr = s->cur_pic.f->data[2] + mb_x * 8 + mb_y * 8 * linesize[2];
1283  if (!s->cur_pic.f->data[2])
1284  dest_cb = dest_cr = NULL;
1285 
1286  put_dc(s, dest_y, dest_cb, dest_cr, mb_x, mb_y);
1287  }
1288  }
1289 #endif
1290 
1291  if (s->avctx->error_concealment & FF_EC_DEBLOCK) {
1292  /* filter horizontal block boundaries */
1293  h_block_filter(s, s->cur_pic.f->data[0], s->mb_width * 2,
1294  s->mb_height * 2, linesize[0], 1);
1295 
1296  /* filter vertical block boundaries */
1297  v_block_filter(s, s->cur_pic.f->data[0], s->mb_width * 2,
1298  s->mb_height * 2, linesize[0], 1);
1299 
1300  if (s->cur_pic.f->data[2]) {
1301  h_block_filter(s, s->cur_pic.f->data[1], s->mb_width,
1302  s->mb_height, linesize[1], 0);
1303  h_block_filter(s, s->cur_pic.f->data[2], s->mb_width,
1304  s->mb_height, linesize[2], 0);
1305  v_block_filter(s, s->cur_pic.f->data[1], s->mb_width,
1306  s->mb_height, linesize[1], 0);
1307  v_block_filter(s, s->cur_pic.f->data[2], s->mb_width,
1308  s->mb_height, linesize[2], 0);
1309  }
1310  }
1311 
1312 ec_clean:
1313  /* clean a few tables */
1314  for (i = 0; i < s->mb_num; i++) {
1315  const int mb_xy = s->mb_index2xy[i];
1316  int error = s->error_status_table[mb_xy];
1317 
1318  if (s->mbskip_table && s->cur_pic.f->pict_type != AV_PICTURE_TYPE_B &&
1319  (error & (ER_DC_ERROR | ER_MV_ERROR | ER_AC_ERROR))) {
1320  s->mbskip_table[mb_xy] = 0;
1321  }
1322  if (s->mbintra_table)
1323  s->mbintra_table[mb_xy] = 1;
1324  }
1325 
1326  for (i = 0; i < 2; i++) {
1327  av_buffer_unref(&s->ref_index_buf[i]);
1328  av_buffer_unref(&s->motion_val_buf[i]);
1329  s->cur_pic.ref_index[i] = NULL;
1330  s->cur_pic.motion_val[i] = NULL;
1331  }
1332 
1333  memset(&s->cur_pic, 0, sizeof(ERPicture));
1334  memset(&s->last_pic, 0, sizeof(ERPicture));
1335  memset(&s->next_pic, 0, sizeof(ERPicture));
1336 }
ff_me_cmp_init
av_cold void ff_me_cmp_init(MECmpContext *c, AVCodecContext *avctx)
Definition: me_cmp.c:936
NULL
#define NULL
Definition: coverity.c:32
AVCodecContext::codec
const struct AVCodec * codec
Definition: avcodec.h:1541
avpriv_atomic_int_add_and_fetch
#define avpriv_atomic_int_add_and_fetch
Definition: atomic_gcc.h:50
s
const char * s
Definition: avisynth_c.h:631
av_buffer_unref
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
h
h
Definition: vp9dsp_template.c:2093
data
ptrdiff_t const GLvoid * data
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MV_CHANGED
#define MV_CHANGED
ERContext::motion_val_buf
AVBufferRef * motion_val_buf[2]
Definition: error_resilience.h:78
AV_LOG_WARNING
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
ER_MB_END
#define ER_MB_END
Definition: error_resilience.h:39
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static void put_dc(ERContext *s, uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr, int mb_x, int mb_y)
Replace the current MB with a flat dc-only version.
Definition: error_resilience.c:60
ff_er_frame_end
void ff_er_frame_end(ERContext *s)
Definition: error_resilience.c:872
v_block_filter
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
Definition: error_resilience.c:310
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static void filter181(int16_t *data, int width, int height, int stride)
Definition: error_resilience.c:98
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#define MB_TYPE_INTRA4x4
Definition: avcodec.h:1140
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const char * b
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VP_START
#define VP_START
< current MB is the first after a resync marker
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#define MAX_NEG_CROP
Definition: mathops.h:30
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static void guess_mv(ERContext *s)
Definition: error_resilience.c:376
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uint32_t * mb_type
Definition: error_resilience.h:49
ERContext::last_pic
ERPicture last_pic
Definition: error_resilience.h:74
mpegvideo.h
mpegvideo header.
ER_MV_ERROR
#define ER_MV_ERROR
Definition: error_resilience.h:33
ff_thread_await_progress
void ff_thread_await_progress(ThreadFrame *f, int n, int field)
Wait for earlier decoding threads to finish reference pictures.
Definition: pthread_frame.c:490
AV_CODEC_ID_H264
Definition: avcodec.h:134
MV_FROZEN
#define MV_FROZEN
ERContext::pp_time
uint16_t pp_time
Definition: error_resilience.h:80
AVCodecContext::hwaccel
struct AVHWAccel * hwaccel
Hardware accelerator in use.
Definition: avcodec.h:2843
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#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
uint8_t
uint8_t
Definition: audio_convert.c:194
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AVBufferRef * ref_index_buf[2]
Definition: error_resilience.h:77
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static const uint32_t color[16+AV_CLASS_CATEGORY_NB]
Definition: log.c:94
thread.h
Multithreading support functions.
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#define ER_MB_ERROR
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#define FF_API_CAP_VDPAU
Definition: version.h:74
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#define avpriv_atomic_int_set
Definition: atomic_gcc.h:39
ERContext::cur_pic
ERPicture cur_pic
Definition: error_resilience.h:73
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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
AV_CODEC_CAP_HWACCEL_VDPAU
#define AV_CODEC_CAP_HWACCEL_VDPAU
Codec can export data for HW decoding (VDPAU).
Definition: avcodec.h:892
ER_MV_END
#define ER_MV_END
Definition: error_resilience.h:36
AVHWAccel::decode_mb
void(* decode_mb)(struct MpegEncContext *s)
Called for every Macroblock in a slice.
Definition: avcodec.h:3605
guess_dc
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
Definition: error_resilience.c:139
FF_DEBUG_ER
#define FF_DEBUG_ER
Definition: avcodec.h:2781
AVCodecContext::lowres
int lowres
low resolution decoding, 1-> 1/2 size, 2->1/4 size
Definition: avcodec.h:2934
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#define FF_EC_GUESS_MVS
Definition: avcodec.h:2754
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ptrdiff_t size
Definition: opengl_enc.c:101
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:28
cm
#define cm
Definition: dvbsubdec.c:36
version.h
Libavcodec version macros.
AVFrame::width
int width
width and height of the video frame
Definition: frame.h:230
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
ff_er_add_slice
void ff_er_add_slice(ERContext *s, int startx, int starty, int endx, int endy, int status)
Add a slice.
Definition: error_resilience.c:802
mask
static const uint16_t mask[17]
Definition: lzw.c:38
AVCodecContext::active_thread_type
int active_thread_type
Which multithreading methods are in use by the codec.
Definition: avcodec.h:2973
AVCodecContext::error_concealment
int error_concealment
error concealment flags
Definition: avcodec.h:2753
AVCodec::capabilities
int capabilities
Codec capabilities.
Definition: avcodec.h:3411
AV_LOG_DEBUG
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
ERContext::decode_mb
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)
Definition: error_resilience.h:86
ERPicture::tf
ThreadFrame * tf
Definition: error_resilience.h:43
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static const uint8_t offset[127][2]
Definition: vf_spp.c:92
FFMAX
#define FFMAX(a, b)
Definition: common.h:94
fail
#define fail()
Definition: checkasm.h:80
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uint8_t * mbintra_table
Definition: error_resilience.h:70
ERContext::mb_index2xy
int * mb_index2xy
Definition: error_resilience.h:58
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int depth
Definition: v4l.c:62
pass
#define pass
Definition: fft_template.c:509
distance
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
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:266
AVFrame::pict_type
enum AVPictureType pict_type
Picture type of the frame.
Definition: frame.h:252
AVCodecContext::err_recognition
int err_recognition
Error recognition; may misdetect some more or less valid parts as errors.
Definition: avcodec.h:2811
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:2755
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
FF_THREAD_SLICE
#define FF_THREAD_SLICE
Decode more than one part of a single frame at once.
Definition: avcodec.h:2966
AV_EF_EXPLODE
#define AV_EF_EXPLODE
abort decoding on minor error detection
Definition: avcodec.h:2822
n
int n
Definition: avisynth_c.h:547
AVCodecContext::skip_top
int skip_top
Number of macroblock rows at the top which are skipped.
Definition: avcodec.h:2141
src
#define src
Definition: vp9dsp.c:530
AV_CODEC_ID_MPEG2VIDEO
preferred ID for MPEG-1/2 video decoding
Definition: avcodec.h:106
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:242
MV_TYPE_16X16
#define MV_TYPE_16X16
1 vector for the whole mb
Definition: mpegvideo.h:266
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:1549
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:209
AVCodecContext::debug
int debug
debug
Definition: avcodec.h:2763
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:82
height
BYTE int const BYTE int int int height
Definition: avisynth_c.h:676
MB_TYPE_16x16
#define MB_TYPE_16x16
Definition: avcodec.h:1143
ERContext::mecc
MECmpContext mecc
Definition: error_resilience.h:55
IS_INTER
#define IS_INTER(a)
Definition: mpegutils.h:81
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:1413
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:2148
AVFrame::data
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:192
MECmpContext::sad
me_cmp_func sad[6]
Definition: me_cmp.h:56
FF_EC_FAVOR_INTER
#define FF_EC_FAVOR_INTER
Definition: avcodec.h:2756
ERContext::error_count
volatile int error_count
Definition: error_resilience.h:64
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:282
MV_UNCHANGED
#define MV_UNCHANGED
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:268
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:691
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:91
er_supported
static int er_supported(ERContext *s)
Definition: error_resilience.c:782
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
ff_er_frame_start
void ff_er_frame_start(ERContext *s)
Definition: error_resilience.c:766
AVFrame::height
int height
Definition: frame.h:230
h_block_filter
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
Definition: error_resilience.c:242
av_freep
#define av_freep(p)
Definition: tableprint_vlc.h:35
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
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:3574
MV_TYPE_8X8
#define MV_TYPE_8X8
4 vectors (h263, mpeg4 4MV)
Definition: mpegvideo.h:267
ERContext::mbskip_table
uint8_t * mbskip_table
Definition: error_resilience.h:69
set_mv_strides
static void set_mv_strides(ERContext *s, int *mv_step, int *stride)
Definition: error_resilience.c:45
MB_TYPE_L0
#define MB_TYPE_L0
Definition: avcodec.h:1156
a
a
Definition: h264pred_template.c:468
width
static int width
Definition: demuxing_decoding.c:39
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