2 * Error resilience / concealment
4 * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
6 * This file is part of FFmpeg.
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.
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.
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
25 * Error resilience / concealment.
30 #include "libavutil/internal.h"
32 #include "error_resilience.h"
34 #include "mpegutils.h"
35 #include "mpegvideo.h"
36 #include "rectangle.h"
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
44 static void set_mv_strides(ERContext *s, int *mv_step, int *stride)
46 if (s->avctx->codec_id == AV_CODEC_ID_H264) {
47 av_assert0(s->quarter_sample);
49 *stride = s->mb_width * 4;
52 *stride = s->b8_stride;
57 * Replace the current MB with a flat dc-only version.
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)
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];
70 for (y = 0; y < 8; y++) {
72 for (x = 0; x < 8; x++)
73 dest_y[x + (i & 1) * 8 + (y + (i >> 1) * 8) * linesize[0]] = dc / 8;
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];
86 for (y = 0; y < 8; y++) {
88 for (x = 0; x < 8; x++) {
89 dest_cb[x + y * linesize[1]] = dcu / 8;
90 dest_cr[x + y * linesize[2]] = dcv / 8;
95 static void filter181(int16_t *data, int width, int height, int stride)
99 /* horizontal filter */
100 for (y = 1; y < height - 1; y++) {
101 int prev_dc = data[0 + y * stride];
103 for (x = 1; x < width - 1; x++) {
106 data[x + y * stride] * 8 -
107 data[x + 1 + y * stride];
108 dc = (dc * 10923 + 32768) >> 16;
109 prev_dc = data[x + y * stride];
110 data[x + y * stride] = dc;
114 /* vertical filter */
115 for (x = 1; x < width - 1; x++) {
116 int prev_dc = data[x];
118 for (y = 1; y < height - 1; y++) {
122 data[x + y * stride] * 8 -
123 data[x + (y + 1) * stride];
124 dc = (dc * 10923 + 32768) >> 16;
125 prev_dc = data[x + y * stride];
126 data[x + y * stride] = dc;
132 * guess the dc of blocks which do not have an undamaged dc
133 * @param w width in 8 pixel blocks
134 * @param h height in 8 pixel blocks
136 static void guess_dc(ERContext *s, int16_t *dc, int w,
137 int h, int stride, int is_luma)
140 int16_t (*col )[4] = av_malloc_array(stride, h*sizeof( int16_t)*4);
141 uint32_t (*dist)[4] = av_malloc_array(stride, h*sizeof(uint32_t)*4);
144 av_log(s->avctx, AV_LOG_ERROR, "guess_dc() is out of memory\n");
148 for(b_y=0; b_y<h; b_y++){
151 for(b_x=0; b_x<w; b_x++){
152 int mb_index_j= (b_x>>is_luma) + (b_y>>is_luma)*s->mb_stride;
153 int error_j= s->error_status_table[mb_index_j];
154 int intra_j = IS_INTRA(s->cur_pic.mb_type[mb_index_j]);
155 if(intra_j==0 || !(error_j&ER_DC_ERROR)){
156 color= dc[b_x + b_y*stride];
159 col [b_x + b_y*stride][1]= color;
160 dist[b_x + b_y*stride][1]= distance >= 0 ? b_x-distance : 9999;
164 for(b_x=w-1; b_x>=0; b_x--){
165 int mb_index_j= (b_x>>is_luma) + (b_y>>is_luma)*s->mb_stride;
166 int error_j= s->error_status_table[mb_index_j];
167 int intra_j = IS_INTRA(s->cur_pic.mb_type[mb_index_j]);
168 if(intra_j==0 || !(error_j&ER_DC_ERROR)){
169 color= dc[b_x + b_y*stride];
172 col [b_x + b_y*stride][0]= color;
173 dist[b_x + b_y*stride][0]= distance >= 0 ? distance-b_x : 9999;
176 for(b_x=0; b_x<w; b_x++){
179 for(b_y=0; b_y<h; b_y++){
180 int mb_index_j= (b_x>>is_luma) + (b_y>>is_luma)*s->mb_stride;
181 int error_j= s->error_status_table[mb_index_j];
182 int intra_j = IS_INTRA(s->cur_pic.mb_type[mb_index_j]);
183 if(intra_j==0 || !(error_j&ER_DC_ERROR)){
184 color= dc[b_x + b_y*stride];
187 col [b_x + b_y*stride][3]= color;
188 dist[b_x + b_y*stride][3]= distance >= 0 ? b_y-distance : 9999;
192 for(b_y=h-1; b_y>=0; b_y--){
193 int mb_index_j= (b_x>>is_luma) + (b_y>>is_luma)*s->mb_stride;
194 int error_j= s->error_status_table[mb_index_j];
195 int intra_j = IS_INTRA(s->cur_pic.mb_type[mb_index_j]);
196 if(intra_j==0 || !(error_j&ER_DC_ERROR)){
197 color= dc[b_x + b_y*stride];
200 col [b_x + b_y*stride][2]= color;
201 dist[b_x + b_y*stride][2]= distance >= 0 ? distance-b_y : 9999;
205 for (b_y = 0; b_y < h; b_y++) {
206 for (b_x = 0; b_x < w; b_x++) {
207 int mb_index, error, j;
208 int64_t guess, weight_sum;
209 mb_index = (b_x >> is_luma) + (b_y >> is_luma) * s->mb_stride;
210 error = s->error_status_table[mb_index];
212 if (IS_INTER(s->cur_pic.mb_type[mb_index]))
214 if (!(error & ER_DC_ERROR))
219 for (j = 0; j < 4; j++) {
220 int64_t weight = 256 * 256 * 256 * 16 / FFMAX(dist[b_x + b_y*stride][j], 1);
221 guess += weight*(int64_t)col[b_x + b_y*stride][j];
222 weight_sum += weight;
224 guess = (guess + weight_sum / 2) / weight_sum;
225 dc[b_x + b_y * stride] = guess;
235 * simple horizontal deblocking filter used for error resilience
236 * @param w width in 8 pixel blocks
237 * @param h height in 8 pixel blocks
239 static void h_block_filter(ERContext *s, uint8_t *dst, int w,
240 int h, int stride, int is_luma)
242 int b_x, b_y, mvx_stride, mvy_stride;
243 const uint8_t *cm = ff_crop_tab + MAX_NEG_CROP;
244 set_mv_strides(s, &mvx_stride, &mvy_stride);
245 mvx_stride >>= is_luma;
246 mvy_stride *= mvx_stride;
248 for (b_y = 0; b_y < h; b_y++) {
249 for (b_x = 0; b_x < w - 1; b_x++) {
251 int left_status = s->error_status_table[( b_x >> is_luma) + (b_y >> is_luma) * s->mb_stride];
252 int right_status = s->error_status_table[((b_x + 1) >> is_luma) + (b_y >> is_luma) * s->mb_stride];
253 int left_intra = IS_INTRA(s->cur_pic.mb_type[( b_x >> is_luma) + (b_y >> is_luma) * s->mb_stride]);
254 int right_intra = IS_INTRA(s->cur_pic.mb_type[((b_x + 1) >> is_luma) + (b_y >> is_luma) * s->mb_stride]);
255 int left_damage = left_status & ER_MB_ERROR;
256 int right_damage = right_status & ER_MB_ERROR;
257 int offset = b_x * 8 + b_y * stride * 8;
258 int16_t *left_mv = s->cur_pic.motion_val[0][mvy_stride * b_y + mvx_stride * b_x];
259 int16_t *right_mv = s->cur_pic.motion_val[0][mvy_stride * b_y + mvx_stride * (b_x + 1)];
260 if (!(left_damage || right_damage))
261 continue; // both undamaged
262 if ((!left_intra) && (!right_intra) &&
263 FFABS(left_mv[0] - right_mv[0]) +
264 FFABS(left_mv[1] + right_mv[1]) < 2)
267 for (y = 0; y < 8; y++) {
270 a = dst[offset + 7 + y * stride] - dst[offset + 6 + y * stride];
271 b = dst[offset + 8 + y * stride] - dst[offset + 7 + y * stride];
272 c = dst[offset + 9 + y * stride] - dst[offset + 8 + y * stride];
274 d = FFABS(b) - ((FFABS(a) + FFABS(c) + 1) >> 1);
282 if (!(left_damage && right_damage))
286 dst[offset + 7 + y * stride] = cm[dst[offset + 7 + y * stride] + ((d * 7) >> 4)];
287 dst[offset + 6 + y * stride] = cm[dst[offset + 6 + y * stride] + ((d * 5) >> 4)];
288 dst[offset + 5 + y * stride] = cm[dst[offset + 5 + y * stride] + ((d * 3) >> 4)];
289 dst[offset + 4 + y * stride] = cm[dst[offset + 4 + y * stride] + ((d * 1) >> 4)];
292 dst[offset + 8 + y * stride] = cm[dst[offset + 8 + y * stride] - ((d * 7) >> 4)];
293 dst[offset + 9 + y * stride] = cm[dst[offset + 9 + y * stride] - ((d * 5) >> 4)];
294 dst[offset + 10+ y * stride] = cm[dst[offset + 10 + y * stride] - ((d * 3) >> 4)];
295 dst[offset + 11+ y * stride] = cm[dst[offset + 11 + y * stride] - ((d * 1) >> 4)];
303 * simple vertical deblocking filter used for error resilience
304 * @param w width in 8 pixel blocks
305 * @param h height in 8 pixel blocks
307 static void v_block_filter(ERContext *s, uint8_t *dst, int w, int h,
308 int stride, int is_luma)
310 int b_x, b_y, mvx_stride, mvy_stride;
311 const uint8_t *cm = ff_crop_tab + MAX_NEG_CROP;
312 set_mv_strides(s, &mvx_stride, &mvy_stride);
313 mvx_stride >>= is_luma;
314 mvy_stride *= mvx_stride;
316 for (b_y = 0; b_y < h - 1; b_y++) {
317 for (b_x = 0; b_x < w; b_x++) {
319 int top_status = s->error_status_table[(b_x >> is_luma) + (b_y >> is_luma) * s->mb_stride];
320 int bottom_status = s->error_status_table[(b_x >> is_luma) + ((b_y + 1) >> is_luma) * s->mb_stride];
321 int top_intra = IS_INTRA(s->cur_pic.mb_type[(b_x >> is_luma) + ( b_y >> is_luma) * s->mb_stride]);
322 int bottom_intra = IS_INTRA(s->cur_pic.mb_type[(b_x >> is_luma) + ((b_y + 1) >> is_luma) * s->mb_stride]);
323 int top_damage = top_status & ER_MB_ERROR;
324 int bottom_damage = bottom_status & ER_MB_ERROR;
325 int offset = b_x * 8 + b_y * stride * 8;
327 int16_t *top_mv = s->cur_pic.motion_val[0][mvy_stride * b_y + mvx_stride * b_x];
328 int16_t *bottom_mv = s->cur_pic.motion_val[0][mvy_stride * (b_y + 1) + mvx_stride * b_x];
330 if (!(top_damage || bottom_damage))
331 continue; // both undamaged
333 if ((!top_intra) && (!bottom_intra) &&
334 FFABS(top_mv[0] - bottom_mv[0]) +
335 FFABS(top_mv[1] + bottom_mv[1]) < 2)
338 for (x = 0; x < 8; x++) {
341 a = dst[offset + x + 7 * stride] - dst[offset + x + 6 * stride];
342 b = dst[offset + x + 8 * stride] - dst[offset + x + 7 * stride];
343 c = dst[offset + x + 9 * stride] - dst[offset + x + 8 * stride];
345 d = FFABS(b) - ((FFABS(a) + FFABS(c) + 1) >> 1);
353 if (!(top_damage && bottom_damage))
357 dst[offset + x + 7 * stride] = cm[dst[offset + x + 7 * stride] + ((d * 7) >> 4)];
358 dst[offset + x + 6 * stride] = cm[dst[offset + x + 6 * stride] + ((d * 5) >> 4)];
359 dst[offset + x + 5 * stride] = cm[dst[offset + x + 5 * stride] + ((d * 3) >> 4)];
360 dst[offset + x + 4 * stride] = cm[dst[offset + x + 4 * stride] + ((d * 1) >> 4)];
363 dst[offset + x + 8 * stride] = cm[dst[offset + x + 8 * stride] - ((d * 7) >> 4)];
364 dst[offset + x + 9 * stride] = cm[dst[offset + x + 9 * stride] - ((d * 5) >> 4)];
365 dst[offset + x + 10 * stride] = cm[dst[offset + x + 10 * stride] - ((d * 3) >> 4)];
366 dst[offset + x + 11 * stride] = cm[dst[offset + x + 11 * stride] - ((d * 1) >> 4)];
373 static void guess_mv(ERContext *s)
375 uint8_t *fixed = s->er_temp_buffer;
378 #define MV_UNCHANGED 1
379 const int mb_stride = s->mb_stride;
380 const int mb_width = s->mb_width;
381 const int mb_height = s->mb_height;
382 int i, depth, num_avail;
383 int mb_x, mb_y, mot_step, mot_stride;
385 set_mv_strides(s, &mot_step, &mot_stride);
388 for (i = 0; i < s->mb_num; i++) {
389 const int mb_xy = s->mb_index2xy[i];
391 int error = s->error_status_table[mb_xy];
393 if (IS_INTRA(s->cur_pic.mb_type[mb_xy]))
394 f = MV_FROZEN; // intra // FIXME check
395 if (!(error & ER_MV_ERROR))
396 f = MV_FROZEN; // inter with undamaged MV
401 else if(s->last_pic.f->data[0] && s->last_pic.motion_val[0]){
402 const int mb_y= mb_xy / s->mb_stride;
403 const int mb_x= mb_xy % s->mb_stride;
404 const int mot_index= (mb_x + mb_y*mot_stride) * mot_step;
405 s->cur_pic.motion_val[0][mot_index][0]= s->last_pic.motion_val[0][mot_index][0];
406 s->cur_pic.motion_val[0][mot_index][1]= s->last_pic.motion_val[0][mot_index][1];
407 s->cur_pic.ref_index[0][4*mb_xy] = s->last_pic.ref_index[0][4*mb_xy];
411 if ((!(s->avctx->error_concealment&FF_EC_GUESS_MVS)) ||
412 num_avail <= mb_width / 2) {
413 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
414 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
415 const int mb_xy = mb_x + mb_y * s->mb_stride;
416 int mv_dir = (s->last_pic.f && s->last_pic.f->data[0]) ? MV_DIR_FORWARD : MV_DIR_BACKWARD;
418 if (IS_INTRA(s->cur_pic.mb_type[mb_xy]))
420 if (!(s->error_status_table[mb_xy] & ER_MV_ERROR))
425 s->decode_mb(s->opaque, 0, mv_dir, MV_TYPE_16X16, &s->mv,
432 for (depth = 0; ; depth++) {
433 int changed, pass, none_left;
437 for (pass = 0; (changed || pass < 2) && pass < 10; pass++) {
442 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
443 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
444 const int mb_xy = mb_x + mb_y * s->mb_stride;
445 int mv_predictor[8][2] = { { 0 } };
449 int best_score = 256 * 256 * 256 * 64;
451 const int mot_index = (mb_x + mb_y * mot_stride) * mot_step;
452 int prev_x = 0, prev_y = 0, prev_ref = 0;
454 if ((mb_x ^ mb_y ^ pass) & 1)
457 if (fixed[mb_xy] == MV_FROZEN)
459 av_assert1(!IS_INTRA(s->cur_pic.mb_type[mb_xy]));
460 av_assert1(s->last_pic.f && s->last_pic.f->data[0]);
463 if (mb_x > 0 && fixed[mb_xy - 1] == MV_FROZEN)
465 if (mb_x + 1 < mb_width && fixed[mb_xy + 1] == MV_FROZEN)
467 if (mb_y > 0 && fixed[mb_xy - mb_stride] == MV_FROZEN)
469 if (mb_y + 1 < mb_height && fixed[mb_xy + mb_stride] == MV_FROZEN)
475 if (mb_x > 0 && fixed[mb_xy - 1 ] == MV_CHANGED)
477 if (mb_x + 1 < mb_width && fixed[mb_xy + 1 ] == MV_CHANGED)
479 if (mb_y > 0 && fixed[mb_xy - mb_stride] == MV_CHANGED)
481 if (mb_y + 1 < mb_height && fixed[mb_xy + mb_stride] == MV_CHANGED)
483 if (j == 0 && pass > 1)
488 if (mb_x > 0 && fixed[mb_xy - 1]) {
489 mv_predictor[pred_count][0] =
490 s->cur_pic.motion_val[0][mot_index - mot_step][0];
491 mv_predictor[pred_count][1] =
492 s->cur_pic.motion_val[0][mot_index - mot_step][1];
494 s->cur_pic.ref_index[0][4 * (mb_xy - 1)];
497 if (mb_x + 1 < mb_width && fixed[mb_xy + 1]) {
498 mv_predictor[pred_count][0] =
499 s->cur_pic.motion_val[0][mot_index + mot_step][0];
500 mv_predictor[pred_count][1] =
501 s->cur_pic.motion_val[0][mot_index + mot_step][1];
503 s->cur_pic.ref_index[0][4 * (mb_xy + 1)];
506 if (mb_y > 0 && fixed[mb_xy - mb_stride]) {
507 mv_predictor[pred_count][0] =
508 s->cur_pic.motion_val[0][mot_index - mot_stride * mot_step][0];
509 mv_predictor[pred_count][1] =
510 s->cur_pic.motion_val[0][mot_index - mot_stride * mot_step][1];
512 s->cur_pic.ref_index[0][4 * (mb_xy - s->mb_stride)];
515 if (mb_y + 1<mb_height && fixed[mb_xy + mb_stride]) {
516 mv_predictor[pred_count][0] =
517 s->cur_pic.motion_val[0][mot_index + mot_stride * mot_step][0];
518 mv_predictor[pred_count][1] =
519 s->cur_pic.motion_val[0][mot_index + mot_stride * mot_step][1];
521 s->cur_pic.ref_index[0][4 * (mb_xy + s->mb_stride)];
527 if (pred_count > 1) {
528 int sum_x = 0, sum_y = 0, sum_r = 0;
529 int max_x, max_y, min_x, min_y, max_r, min_r;
531 for (j = 0; j < pred_count; j++) {
532 sum_x += mv_predictor[j][0];
533 sum_y += mv_predictor[j][1];
535 if (j && ref[j] != ref[j - 1])
536 goto skip_mean_and_median;
540 mv_predictor[pred_count][0] = sum_x / j;
541 mv_predictor[pred_count][1] = sum_y / j;
542 ref[pred_count] = sum_r / j;
545 if (pred_count >= 3) {
546 min_y = min_x = min_r = 99999;
547 max_y = max_x = max_r = -99999;
549 min_x = min_y = max_x = max_y = min_r = max_r = 0;
551 for (j = 0; j < pred_count; j++) {
552 max_x = FFMAX(max_x, mv_predictor[j][0]);
553 max_y = FFMAX(max_y, mv_predictor[j][1]);
554 max_r = FFMAX(max_r, ref[j]);
555 min_x = FFMIN(min_x, mv_predictor[j][0]);
556 min_y = FFMIN(min_y, mv_predictor[j][1]);
557 min_r = FFMIN(min_r, ref[j]);
559 mv_predictor[pred_count + 1][0] = sum_x - max_x - min_x;
560 mv_predictor[pred_count + 1][1] = sum_y - max_y - min_y;
561 ref[pred_count + 1] = sum_r - max_r - min_r;
563 if (pred_count == 4) {
564 mv_predictor[pred_count + 1][0] /= 2;
565 mv_predictor[pred_count + 1][1] /= 2;
566 ref[pred_count + 1] /= 2;
571 skip_mean_and_median:
575 if (!fixed[mb_xy] && 0) {
576 if (s->avctx->codec_id == AV_CODEC_ID_H264) {
579 ff_thread_await_progress(s->last_pic.tf,
582 if (!s->last_pic.motion_val[0] ||
583 !s->last_pic.ref_index[0])
585 prev_x = s->last_pic.motion_val[0][mot_index][0];
586 prev_y = s->last_pic.motion_val[0][mot_index][1];
587 prev_ref = s->last_pic.ref_index[0][4 * mb_xy];
589 prev_x = s->cur_pic.motion_val[0][mot_index][0];
590 prev_y = s->cur_pic.motion_val[0][mot_index][1];
591 prev_ref = s->cur_pic.ref_index[0][4 * mb_xy];
595 mv_predictor[pred_count][0] = prev_x;
596 mv_predictor[pred_count][1] = prev_y;
597 ref[pred_count] = prev_ref;
602 for (j = 0; j < pred_count; j++) {
603 int *linesize = s->cur_pic.f->linesize;
605 uint8_t *src = s->cur_pic.f->data[0] +
606 mb_x * 16 + mb_y * 16 * linesize[0];
608 s->cur_pic.motion_val[0][mot_index][0] =
609 s->mv[0][0][0] = mv_predictor[j][0];
610 s->cur_pic.motion_val[0][mot_index][1] =
611 s->mv[0][0][1] = mv_predictor[j][1];
613 // predictor intra or otherwise not available
617 s->decode_mb(s->opaque, ref[j], MV_DIR_FORWARD,
618 MV_TYPE_16X16, &s->mv, mb_x, mb_y, 0, 0);
620 if (mb_x > 0 && fixed[mb_xy - 1]) {
622 for (k = 0; k < 16; k++)
623 score += FFABS(src[k * linesize[0] - 1] -
624 src[k * linesize[0]]);
626 if (mb_x + 1 < mb_width && fixed[mb_xy + 1]) {
628 for (k = 0; k < 16; k++)
629 score += FFABS(src[k * linesize[0] + 15] -
630 src[k * linesize[0] + 16]);
632 if (mb_y > 0 && fixed[mb_xy - mb_stride]) {
634 for (k = 0; k < 16; k++)
635 score += FFABS(src[k - linesize[0]] - src[k]);
637 if (mb_y + 1 < mb_height && fixed[mb_xy + mb_stride]) {
639 for (k = 0; k < 16; k++)
640 score += FFABS(src[k + linesize[0] * 15] -
641 src[k + linesize[0] * 16]);
644 if (score <= best_score) { // <= will favor the last MV
649 score_sum += best_score;
650 s->mv[0][0][0] = mv_predictor[best_pred][0];
651 s->mv[0][0][1] = mv_predictor[best_pred][1];
653 for (i = 0; i < mot_step; i++)
654 for (j = 0; j < mot_step; j++) {
655 s->cur_pic.motion_val[0][mot_index + i + j * mot_stride][0] = s->mv[0][0][0];
656 s->cur_pic.motion_val[0][mot_index + i + j * mot_stride][1] = s->mv[0][0][1];
659 s->decode_mb(s->opaque, ref[best_pred], MV_DIR_FORWARD,
660 MV_TYPE_16X16, &s->mv, mb_x, mb_y, 0, 0);
663 if (s->mv[0][0][0] != prev_x || s->mv[0][0][1] != prev_y) {
664 fixed[mb_xy] = MV_CHANGED;
667 fixed[mb_xy] = MV_UNCHANGED;
675 for (i = 0; i < s->mb_num; i++) {
676 int mb_xy = s->mb_index2xy[i];
678 fixed[mb_xy] = MV_FROZEN;
683 static int is_intra_more_likely(ERContext *s)
685 int is_intra_likely, i, j, undamaged_count, skip_amount, mb_x, mb_y;
687 if (!s->last_pic.f || !s->last_pic.f->data[0])
688 return 1; // no previous frame available -> use spatial prediction
690 if (s->avctx->error_concealment & FF_EC_FAVOR_INTER)
694 for (i = 0; i < s->mb_num; i++) {
695 const int mb_xy = s->mb_index2xy[i];
696 const int error = s->error_status_table[mb_xy];
697 if (!((error & ER_DC_ERROR) && (error & ER_MV_ERROR)))
701 if (undamaged_count < 5)
702 return 0; // almost all MBs damaged -> use temporal prediction
704 // prevent dsp.sad() check, that requires access to the image
706 s->avctx->hwaccel && s->avctx->hwaccel->decode_mb &&
707 s->cur_pic.f->pict_type == AV_PICTURE_TYPE_I)
710 skip_amount = FFMAX(undamaged_count / 50, 1); // check only up to 50 MBs
714 for (mb_y = 0; mb_y < s->mb_height - 1; mb_y++) {
715 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
717 const int mb_xy = mb_x + mb_y * s->mb_stride;
719 error = s->error_status_table[mb_xy];
720 if ((error & ER_DC_ERROR) && (error & ER_MV_ERROR))
721 continue; // skip damaged
724 // skip a few to speed things up
725 if ((j % skip_amount) != 0)
728 if (s->cur_pic.f->pict_type == AV_PICTURE_TYPE_I) {
729 int *linesize = s->cur_pic.f->linesize;
730 uint8_t *mb_ptr = s->cur_pic.f->data[0] +
731 mb_x * 16 + mb_y * 16 * linesize[0];
732 uint8_t *last_mb_ptr = s->last_pic.f->data[0] +
733 mb_x * 16 + mb_y * 16 * linesize[0];
735 if (s->avctx->codec_id == AV_CODEC_ID_H264) {
738 ff_thread_await_progress(s->last_pic.tf, mb_y, 0);
740 is_intra_likely += s->mecc.sad[0](NULL, last_mb_ptr, mb_ptr,
742 // FIXME need await_progress() here
743 is_intra_likely -= s->mecc.sad[0](NULL, last_mb_ptr,
744 last_mb_ptr + linesize[0] * 16,
747 if (IS_INTRA(s->cur_pic.mb_type[mb_xy]))
754 // av_log(NULL, AV_LOG_ERROR, "is_intra_likely: %d type:%d\n", is_intra_likely, s->pict_type);
755 return is_intra_likely > 0;
758 void ff_er_frame_start(ERContext *s)
760 if (!s->avctx->error_concealment)
763 if (!s->mecc_inited) {
764 ff_me_cmp_init(&s->mecc, s->avctx);
768 memset(s->error_status_table, ER_MB_ERROR | VP_START | ER_MB_END,
769 s->mb_stride * s->mb_height * sizeof(uint8_t));
770 s->error_count = 3 * s->mb_num;
771 s->error_occurred = 0;
774 static int er_supported(ERContext *s)
776 if(s->avctx->hwaccel && s->avctx->hwaccel->decode_slice ||
777 s->avctx->codec->capabilities&CODEC_CAP_HWACCEL_VDPAU ||
779 s->cur_pic.field_picture
787 * @param endx x component of the last macroblock, can be -1
788 * for the last of the previous line
789 * @param status the status at the end (ER_MV_END, ER_AC_ERROR, ...), it is
790 * assumed that no earlier end or error of the same type occurred
792 void ff_er_add_slice(ERContext *s, int startx, int starty,
793 int endx, int endy, int status)
795 const int start_i = av_clip(startx + starty * s->mb_width, 0, s->mb_num - 1);
796 const int end_i = av_clip(endx + endy * s->mb_width, 0, s->mb_num);
797 const int start_xy = s->mb_index2xy[start_i];
798 const int end_xy = s->mb_index2xy[end_i];
801 if (s->avctx->hwaccel && s->avctx->hwaccel->decode_slice)
804 if (start_i > end_i || start_xy > end_xy) {
805 av_log(s->avctx, AV_LOG_ERROR,
806 "internal error, slice end before start\n");
810 if (!s->avctx->error_concealment)
814 if (status & (ER_AC_ERROR | ER_AC_END)) {
815 mask &= ~(ER_AC_ERROR | ER_AC_END);
816 s->error_count -= end_i - start_i + 1;
818 if (status & (ER_DC_ERROR | ER_DC_END)) {
819 mask &= ~(ER_DC_ERROR | ER_DC_END);
820 s->error_count -= end_i - start_i + 1;
822 if (status & (ER_MV_ERROR | ER_MV_END)) {
823 mask &= ~(ER_MV_ERROR | ER_MV_END);
824 s->error_count -= end_i - start_i + 1;
827 if (status & ER_MB_ERROR) {
828 s->error_occurred = 1;
829 s->error_count = INT_MAX;
833 memset(&s->error_status_table[start_xy], 0,
834 (end_xy - start_xy) * sizeof(uint8_t));
837 for (i = start_xy; i < end_xy; i++)
838 s->error_status_table[i] &= mask;
841 if (end_i == s->mb_num)
842 s->error_count = INT_MAX;
844 s->error_status_table[end_xy] &= mask;
845 s->error_status_table[end_xy] |= status;
848 s->error_status_table[start_xy] |= VP_START;
850 if (start_xy > 0 && !(s->avctx->active_thread_type & FF_THREAD_SLICE) &&
851 er_supported(s) && s->avctx->skip_top * s->mb_width < start_i) {
852 int prev_status = s->error_status_table[s->mb_index2xy[start_i - 1]];
854 prev_status &= ~ VP_START;
855 if (prev_status != (ER_MV_END | ER_DC_END | ER_AC_END)) {
856 s->error_occurred = 1;
857 s->error_count = INT_MAX;
862 void ff_er_frame_end(ERContext *s)
864 int *linesize = NULL;
865 int i, mb_x, mb_y, error, error_type, dc_error, mv_error, ac_error;
867 int threshold_part[4] = { 100, 100, 100 };
870 int size = s->b8_stride * 2 * s->mb_height;
872 /* We do not support ER of field pictures yet,
873 * though it should not crash if enabled. */
874 if (!s->avctx->error_concealment || s->error_count == 0 ||
877 s->error_count == 3 * s->mb_width *
878 (s->avctx->skip_top + s->avctx->skip_bottom)) {
881 linesize = s->cur_pic.f->linesize;
882 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
883 int status = s->error_status_table[mb_x + (s->mb_height - 1) * s->mb_stride];
888 if ( mb_x == s->mb_width
889 && s->avctx->codec_id == AV_CODEC_ID_MPEG2VIDEO
890 && (s->avctx->height&16)
891 && s->error_count == 3 * s->mb_width * (s->avctx->skip_top + s->avctx->skip_bottom + 1)
893 av_log(s->avctx, AV_LOG_DEBUG, "ignoring last missing slice\n");
898 if (s->last_pic.f->width != s->cur_pic.f->width ||
899 s->last_pic.f->height != s->cur_pic.f->height ||
900 s->last_pic.f->format != s->cur_pic.f->format) {
901 av_log(s->avctx, AV_LOG_WARNING, "Cannot use previous picture in error concealment\n");
902 memset(&s->last_pic, 0, sizeof(s->last_pic));
906 if (s->next_pic.f->width != s->cur_pic.f->width ||
907 s->next_pic.f->height != s->cur_pic.f->height ||
908 s->next_pic.f->format != s->cur_pic.f->format) {
909 av_log(s->avctx, AV_LOG_WARNING, "Cannot use next picture in error concealment\n");
910 memset(&s->next_pic, 0, sizeof(s->next_pic));
914 if (!s->cur_pic.motion_val[0] || !s->cur_pic.ref_index[0]) {
915 av_log(s->avctx, AV_LOG_ERROR, "Warning MVs not available\n");
917 for (i = 0; i < 2; i++) {
918 s->ref_index_buf[i] = av_buffer_allocz(s->mb_stride * s->mb_height * 4 * sizeof(uint8_t));
919 s->motion_val_buf[i] = av_buffer_allocz((size + 4) * 2 * sizeof(uint16_t));
920 if (!s->ref_index_buf[i] || !s->motion_val_buf[i])
922 s->cur_pic.ref_index[i] = s->ref_index_buf[i]->data;
923 s->cur_pic.motion_val[i] = (int16_t (*)[2])s->motion_val_buf[i]->data + 4;
926 for (i = 0; i < 2; i++) {
927 av_buffer_unref(&s->ref_index_buf[i]);
928 av_buffer_unref(&s->motion_val_buf[i]);
929 s->cur_pic.ref_index[i] = NULL;
930 s->cur_pic.motion_val[i] = NULL;
936 if (s->avctx->debug & FF_DEBUG_ER) {
937 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
938 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
939 int status = s->error_status_table[mb_x + mb_y * s->mb_stride];
941 av_log(s->avctx, AV_LOG_DEBUG, "%2X ", status);
943 av_log(s->avctx, AV_LOG_DEBUG, "\n");
948 /* handle overlapping slices */
949 for (error_type = 1; error_type <= 3; error_type++) {
952 for (i = s->mb_num - 1; i >= 0; i--) {
953 const int mb_xy = s->mb_index2xy[i];
954 int error = s->error_status_table[mb_xy];
956 if (error & (1 << error_type))
958 if (error & (8 << error_type))
962 s->error_status_table[mb_xy] |= 1 << error_type;
964 if (error & VP_START)
970 /* handle slices with partitions of different length */
971 if (s->partitioned_frame) {
974 for (i = s->mb_num - 1; i >= 0; i--) {
975 const int mb_xy = s->mb_index2xy[i];
976 int error = s->error_status_table[mb_xy];
978 if (error & ER_AC_END)
980 if ((error & ER_MV_END) ||
981 (error & ER_DC_END) ||
982 (error & ER_AC_ERROR))
986 s->error_status_table[mb_xy]|= ER_AC_ERROR;
988 if (error & VP_START)
993 /* handle missing slices */
994 if (s->avctx->err_recognition & AV_EF_EXPLODE) {
998 for (i = s->mb_num - 2; i >= s->mb_width + 100; i--) {
999 const int mb_xy = s->mb_index2xy[i];
1000 int error1 = s->error_status_table[mb_xy];
1001 int error2 = s->error_status_table[s->mb_index2xy[i + 1]];
1003 if (error1 & VP_START)
1006 if (error2 == (VP_START | ER_MB_ERROR | ER_MB_END) &&
1007 error1 != (VP_START | ER_MB_ERROR | ER_MB_END) &&
1008 ((error1 & ER_AC_END) || (error1 & ER_DC_END) ||
1009 (error1 & ER_MV_END))) {
1015 s->error_status_table[mb_xy] |= ER_MB_ERROR;
1020 /* backward mark errors */
1022 for (error_type = 1; error_type <= 3; error_type++) {
1023 for (i = s->mb_num - 1; i >= 0; i--) {
1024 const int mb_xy = s->mb_index2xy[i];
1025 int error = s->error_status_table[mb_xy];
1027 if (!s->mbskip_table[mb_xy]) // FIXME partition specific
1029 if (error & (1 << error_type))
1032 if (s->partitioned_frame) {
1033 if (distance < threshold_part[error_type - 1])
1034 s->error_status_table[mb_xy] |= 1 << error_type;
1036 if (distance < threshold)
1037 s->error_status_table[mb_xy] |= 1 << error_type;
1040 if (error & VP_START)
1046 /* forward mark errors */
1048 for (i = 0; i < s->mb_num; i++) {
1049 const int mb_xy = s->mb_index2xy[i];
1050 int old_error = s->error_status_table[mb_xy];
1052 if (old_error & VP_START) {
1053 error = old_error & ER_MB_ERROR;
1055 error |= old_error & ER_MB_ERROR;
1056 s->error_status_table[mb_xy] |= error;
1060 /* handle not partitioned case */
1061 if (!s->partitioned_frame) {
1062 for (i = 0; i < s->mb_num; i++) {
1063 const int mb_xy = s->mb_index2xy[i];
1064 int error = s->error_status_table[mb_xy];
1065 if (error & ER_MB_ERROR)
1066 error |= ER_MB_ERROR;
1067 s->error_status_table[mb_xy] = error;
1072 dc_error = ac_error = mv_error = 0;
1073 for (i = 0; i < s->mb_num; i++) {
1074 const int mb_xy = s->mb_index2xy[i];
1075 int error = s->error_status_table[mb_xy];
1076 if (error & ER_DC_ERROR)
1078 if (error & ER_AC_ERROR)
1080 if (error & ER_MV_ERROR)
1083 av_log(s->avctx, AV_LOG_INFO, "concealing %d DC, %d AC, %d MV errors in %c frame\n",
1084 dc_error, ac_error, mv_error, av_get_picture_type_char(s->cur_pic.f->pict_type));
1086 is_intra_likely = is_intra_more_likely(s);
1088 /* set unknown mb-type to most likely */
1089 for (i = 0; i < s->mb_num; i++) {
1090 const int mb_xy = s->mb_index2xy[i];
1091 int error = s->error_status_table[mb_xy];
1092 if (!((error & ER_DC_ERROR) && (error & ER_MV_ERROR)))
1095 if (is_intra_likely)
1096 s->cur_pic.mb_type[mb_xy] = MB_TYPE_INTRA4x4;
1098 s->cur_pic.mb_type[mb_xy] = MB_TYPE_16x16 | MB_TYPE_L0;
1101 // change inter to intra blocks if no reference frames are available
1102 if (!(s->last_pic.f && s->last_pic.f->data[0]) &&
1103 !(s->next_pic.f && s->next_pic.f->data[0]))
1104 for (i = 0; i < s->mb_num; i++) {
1105 const int mb_xy = s->mb_index2xy[i];
1106 if (!IS_INTRA(s->cur_pic.mb_type[mb_xy]))
1107 s->cur_pic.mb_type[mb_xy] = MB_TYPE_INTRA4x4;
1110 /* handle inter blocks with damaged AC */
1111 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1112 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1113 const int mb_xy = mb_x + mb_y * s->mb_stride;
1114 const int mb_type = s->cur_pic.mb_type[mb_xy];
1115 const int dir = !(s->last_pic.f && s->last_pic.f->data[0]);
1116 const int mv_dir = dir ? MV_DIR_BACKWARD : MV_DIR_FORWARD;
1119 int error = s->error_status_table[mb_xy];
1121 if (IS_INTRA(mb_type))
1123 if (error & ER_MV_ERROR)
1124 continue; // inter with damaged MV
1125 if (!(error & ER_AC_ERROR))
1126 continue; // undamaged inter
1128 if (IS_8X8(mb_type)) {
1129 int mb_index = mb_x * 2 + mb_y * 2 * s->b8_stride;
1131 mv_type = MV_TYPE_8X8;
1132 for (j = 0; j < 4; j++) {
1133 s->mv[0][j][0] = s->cur_pic.motion_val[dir][mb_index + (j & 1) + (j >> 1) * s->b8_stride][0];
1134 s->mv[0][j][1] = s->cur_pic.motion_val[dir][mb_index + (j & 1) + (j >> 1) * s->b8_stride][1];
1137 mv_type = MV_TYPE_16X16;
1138 s->mv[0][0][0] = s->cur_pic.motion_val[dir][mb_x * 2 + mb_y * 2 * s->b8_stride][0];
1139 s->mv[0][0][1] = s->cur_pic.motion_val[dir][mb_x * 2 + mb_y * 2 * s->b8_stride][1];
1142 s->decode_mb(s->opaque, 0 /* FIXME h264 partitioned slices need this set */,
1143 mv_dir, mv_type, &s->mv, mb_x, mb_y, 0, 0);
1148 if (s->cur_pic.f->pict_type == AV_PICTURE_TYPE_B) {
1149 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1150 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1151 int xy = mb_x * 2 + mb_y * 2 * s->b8_stride;
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 int mv_dir = MV_DIR_FORWARD | MV_DIR_BACKWARD;
1156 int error = s->error_status_table[mb_xy];
1158 if (IS_INTRA(mb_type))
1160 if (!(error & ER_MV_ERROR))
1161 continue; // inter with undamaged MV
1162 if (!(error & ER_AC_ERROR))
1163 continue; // undamaged inter
1165 if (!(s->last_pic.f && s->last_pic.f->data[0]))
1166 mv_dir &= ~MV_DIR_FORWARD;
1167 if (!(s->next_pic.f && s->next_pic.f->data[0]))
1168 mv_dir &= ~MV_DIR_BACKWARD;
1171 int time_pp = s->pp_time;
1172 int time_pb = s->pb_time;
1174 av_assert0(s->avctx->codec_id != AV_CODEC_ID_H264);
1175 ff_thread_await_progress(s->next_pic.tf, mb_y, 0);
1177 s->mv[0][0][0] = s->next_pic.motion_val[0][xy][0] * time_pb / time_pp;
1178 s->mv[0][0][1] = s->next_pic.motion_val[0][xy][1] * time_pb / time_pp;
1179 s->mv[1][0][0] = s->next_pic.motion_val[0][xy][0] * (time_pb - time_pp) / time_pp;
1180 s->mv[1][0][1] = s->next_pic.motion_val[0][xy][1] * (time_pb - time_pp) / time_pp;
1188 s->decode_mb(s->opaque, 0, mv_dir, MV_TYPE_16X16, &s->mv,
1195 /* the filters below manipulate raw image, skip them */
1196 if (CONFIG_XVMC && s->avctx->hwaccel && s->avctx->hwaccel->decode_mb)
1198 /* fill DC for inter blocks */
1199 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1200 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1201 int dc, dcu, dcv, y, n;
1203 uint8_t *dest_y, *dest_cb, *dest_cr;
1204 const int mb_xy = mb_x + mb_y * s->mb_stride;
1205 const int mb_type = s->cur_pic.mb_type[mb_xy];
1207 // error = s->error_status_table[mb_xy];
1209 if (IS_INTRA(mb_type) && s->partitioned_frame)
1211 // if (error & ER_MV_ERROR)
1212 // continue; // inter data damaged FIXME is this good?
1214 dest_y = s->cur_pic.f->data[0] + mb_x * 16 + mb_y * 16 * linesize[0];
1215 dest_cb = s->cur_pic.f->data[1] + mb_x * 8 + mb_y * 8 * linesize[1];
1216 dest_cr = s->cur_pic.f->data[2] + mb_x * 8 + mb_y * 8 * linesize[2];
1218 dc_ptr = &s->dc_val[0][mb_x * 2 + mb_y * 2 * s->b8_stride];
1219 for (n = 0; n < 4; n++) {
1221 for (y = 0; y < 8; y++) {
1223 for (x = 0; x < 8; x++)
1224 dc += dest_y[x + (n & 1) * 8 +
1225 (y + (n >> 1) * 8) * linesize[0]];
1227 dc_ptr[(n & 1) + (n >> 1) * s->b8_stride] = (dc + 4) >> 3;
1231 for (y = 0; y < 8; y++) {
1233 for (x = 0; x < 8; x++) {
1234 dcu += dest_cb[x + y * linesize[1]];
1235 dcv += dest_cr[x + y * linesize[2]];
1238 s->dc_val[1][mb_x + mb_y * s->mb_stride] = (dcu + 4) >> 3;
1239 s->dc_val[2][mb_x + mb_y * s->mb_stride] = (dcv + 4) >> 3;
1243 /* guess DC for damaged blocks */
1244 guess_dc(s, s->dc_val[0], s->mb_width*2, s->mb_height*2, s->b8_stride, 1);
1245 guess_dc(s, s->dc_val[1], s->mb_width , s->mb_height , s->mb_stride, 0);
1246 guess_dc(s, s->dc_val[2], s->mb_width , s->mb_height , s->mb_stride, 0);
1249 /* filter luma DC */
1250 filter181(s->dc_val[0], s->mb_width * 2, s->mb_height * 2, s->b8_stride);
1253 /* render DC only intra */
1254 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1255 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1256 uint8_t *dest_y, *dest_cb, *dest_cr;
1257 const int mb_xy = mb_x + mb_y * s->mb_stride;
1258 const int mb_type = s->cur_pic.mb_type[mb_xy];
1260 int error = s->error_status_table[mb_xy];
1262 if (IS_INTER(mb_type))
1264 if (!(error & ER_AC_ERROR))
1265 continue; // undamaged
1267 dest_y = s->cur_pic.f->data[0] + mb_x * 16 + mb_y * 16 * linesize[0];
1268 dest_cb = s->cur_pic.f->data[1] + mb_x * 8 + mb_y * 8 * linesize[1];
1269 dest_cr = s->cur_pic.f->data[2] + mb_x * 8 + mb_y * 8 * linesize[2];
1271 put_dc(s, dest_y, dest_cb, dest_cr, mb_x, mb_y);
1276 if (s->avctx->error_concealment & FF_EC_DEBLOCK) {
1277 /* filter horizontal block boundaries */
1278 h_block_filter(s, s->cur_pic.f->data[0], s->mb_width * 2,
1279 s->mb_height * 2, linesize[0], 1);
1280 h_block_filter(s, s->cur_pic.f->data[1], s->mb_width,
1281 s->mb_height, linesize[1], 0);
1282 h_block_filter(s, s->cur_pic.f->data[2], s->mb_width,
1283 s->mb_height, linesize[2], 0);
1285 /* filter vertical block boundaries */
1286 v_block_filter(s, s->cur_pic.f->data[0], s->mb_width * 2,
1287 s->mb_height * 2, linesize[0], 1);
1288 v_block_filter(s, s->cur_pic.f->data[1], s->mb_width,
1289 s->mb_height, linesize[1], 0);
1290 v_block_filter(s, s->cur_pic.f->data[2], s->mb_width,
1291 s->mb_height, linesize[2], 0);
1295 /* clean a few tables */
1296 for (i = 0; i < s->mb_num; i++) {
1297 const int mb_xy = s->mb_index2xy[i];
1298 int error = s->error_status_table[mb_xy];
1300 if (s->cur_pic.f->pict_type != AV_PICTURE_TYPE_B &&
1301 (error & (ER_DC_ERROR | ER_MV_ERROR | ER_AC_ERROR))) {
1302 s->mbskip_table[mb_xy] = 0;
1304 s->mbintra_table[mb_xy] = 1;
1307 for (i = 0; i < 2; i++) {
1308 av_buffer_unref(&s->ref_index_buf[i]);
1309 av_buffer_unref(&s->motion_val_buf[i]);
1310 s->cur_pic.ref_index[i] = NULL;
1311 s->cur_pic.motion_val[i] = NULL;
1314 memset(&s->cur_pic, 0, sizeof(ERPicture));
1315 memset(&s->last_pic, 0, sizeof(ERPicture));
1316 memset(&s->next_pic, 0, sizeof(ERPicture));