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"
33 #include "mpegutils.h"
34 #include "mpegvideo.h"
35 #include "rectangle.h"
40 * @param stride the number of MVs to get to the next row
41 * @param mv_step the number of MVs per row or column in a macroblock
43 static void set_mv_strides(ERContext *s, int *mv_step, int *stride)
45 if (s->avctx->codec_id == AV_CODEC_ID_H264) {
46 av_assert0(s->quarter_sample);
48 *stride = s->mb_width * 4;
51 *stride = s->b8_stride;
56 * Replace the current MB with a flat dc-only version.
58 static void put_dc(ERContext *s, uint8_t *dest_y, uint8_t *dest_cb,
59 uint8_t *dest_cr, int mb_x, int mb_y)
61 int *linesize = s->cur_pic.f->linesize;
62 int dc, dcu, dcv, y, i;
63 for (i = 0; i < 4; i++) {
64 dc = s->dc_val[0][mb_x * 2 + (i & 1) + (mb_y * 2 + (i >> 1)) * s->b8_stride];
69 for (y = 0; y < 8; y++) {
71 for (x = 0; x < 8; x++)
72 dest_y[x + (i & 1) * 8 + (y + (i >> 1) * 8) * linesize[0]] = dc / 8;
75 dcu = s->dc_val[1][mb_x + mb_y * s->mb_stride];
76 dcv = s->dc_val[2][mb_x + mb_y * s->mb_stride];
85 for (y = 0; y < 8; y++) {
87 for (x = 0; x < 8; x++) {
88 dest_cb[x + y * linesize[1]] = dcu / 8;
89 dest_cr[x + y * linesize[2]] = dcv / 8;
94 static void filter181(int16_t *data, int width, int height, int stride)
98 /* horizontal filter */
99 for (y = 1; y < height - 1; y++) {
100 int prev_dc = data[0 + y * stride];
102 for (x = 1; x < width - 1; x++) {
105 data[x + y * stride] * 8 -
106 data[x + 1 + y * stride];
107 dc = (dc * 10923 + 32768) >> 16;
108 prev_dc = data[x + y * stride];
109 data[x + y * stride] = dc;
113 /* vertical filter */
114 for (x = 1; x < width - 1; x++) {
115 int prev_dc = data[x];
117 for (y = 1; y < height - 1; y++) {
121 data[x + y * stride] * 8 -
122 data[x + (y + 1) * stride];
123 dc = (dc * 10923 + 32768) >> 16;
124 prev_dc = data[x + y * stride];
125 data[x + y * stride] = dc;
131 * guess the dc of blocks which do not have an undamaged dc
132 * @param w width in 8 pixel blocks
133 * @param h height in 8 pixel blocks
135 static void guess_dc(ERContext *s, int16_t *dc, int w,
136 int h, int stride, int is_luma)
139 int16_t (*col )[4] = av_malloc(stride*h*sizeof( int16_t)*4);
140 uint32_t (*dist)[4] = av_malloc(stride*h*sizeof(uint32_t)*4);
143 av_log(s->avctx, AV_LOG_ERROR, "guess_dc() is out of memory\n");
147 for(b_y=0; b_y<h; b_y++){
150 for(b_x=0; b_x<w; b_x++){
151 int mb_index_j= (b_x>>is_luma) + (b_y>>is_luma)*s->mb_stride;
152 int error_j= s->error_status_table[mb_index_j];
153 int intra_j = IS_INTRA(s->cur_pic.mb_type[mb_index_j]);
154 if(intra_j==0 || !(error_j&ER_DC_ERROR)){
155 color= dc[b_x + b_y*stride];
158 col [b_x + b_y*stride][1]= color;
159 dist[b_x + b_y*stride][1]= distance >= 0 ? b_x-distance : 9999;
163 for(b_x=w-1; b_x>=0; b_x--){
164 int mb_index_j= (b_x>>is_luma) + (b_y>>is_luma)*s->mb_stride;
165 int error_j= s->error_status_table[mb_index_j];
166 int intra_j = IS_INTRA(s->cur_pic.mb_type[mb_index_j]);
167 if(intra_j==0 || !(error_j&ER_DC_ERROR)){
168 color= dc[b_x + b_y*stride];
171 col [b_x + b_y*stride][0]= color;
172 dist[b_x + b_y*stride][0]= distance >= 0 ? distance-b_x : 9999;
175 for(b_x=0; b_x<w; b_x++){
178 for(b_y=0; b_y<h; b_y++){
179 int mb_index_j= (b_x>>is_luma) + (b_y>>is_luma)*s->mb_stride;
180 int error_j= s->error_status_table[mb_index_j];
181 int intra_j = IS_INTRA(s->cur_pic.mb_type[mb_index_j]);
182 if(intra_j==0 || !(error_j&ER_DC_ERROR)){
183 color= dc[b_x + b_y*stride];
186 col [b_x + b_y*stride][3]= color;
187 dist[b_x + b_y*stride][3]= distance >= 0 ? b_y-distance : 9999;
191 for(b_y=h-1; b_y>=0; b_y--){
192 int mb_index_j= (b_x>>is_luma) + (b_y>>is_luma)*s->mb_stride;
193 int error_j= s->error_status_table[mb_index_j];
194 int intra_j = IS_INTRA(s->cur_pic.mb_type[mb_index_j]);
195 if(intra_j==0 || !(error_j&ER_DC_ERROR)){
196 color= dc[b_x + b_y*stride];
199 col [b_x + b_y*stride][2]= color;
200 dist[b_x + b_y*stride][2]= distance >= 0 ? distance-b_y : 9999;
204 for (b_y = 0; b_y < h; b_y++) {
205 for (b_x = 0; b_x < w; b_x++) {
206 int mb_index, error, j;
207 int64_t guess, weight_sum;
208 mb_index = (b_x >> is_luma) + (b_y >> is_luma) * s->mb_stride;
209 error = s->error_status_table[mb_index];
211 if (IS_INTER(s->cur_pic.mb_type[mb_index]))
213 if (!(error & ER_DC_ERROR))
218 for (j = 0; j < 4; j++) {
219 int64_t weight = 256 * 256 * 256 * 16 / FFMAX(dist[b_x + b_y*stride][j], 1);
220 guess += weight*(int64_t)col[b_x + b_y*stride][j];
221 weight_sum += weight;
223 guess = (guess + weight_sum / 2) / weight_sum;
224 dc[b_x + b_y * stride] = guess;
234 * simple horizontal deblocking filter used for error resilience
235 * @param w width in 8 pixel blocks
236 * @param h height in 8 pixel blocks
238 static void h_block_filter(ERContext *s, uint8_t *dst, int w,
239 int h, int stride, int is_luma)
241 int b_x, b_y, mvx_stride, mvy_stride;
242 const uint8_t *cm = ff_crop_tab + MAX_NEG_CROP;
243 set_mv_strides(s, &mvx_stride, &mvy_stride);
244 mvx_stride >>= is_luma;
245 mvy_stride *= mvx_stride;
247 for (b_y = 0; b_y < h; b_y++) {
248 for (b_x = 0; b_x < w - 1; b_x++) {
250 int left_status = s->error_status_table[( b_x >> is_luma) + (b_y >> is_luma) * s->mb_stride];
251 int right_status = s->error_status_table[((b_x + 1) >> is_luma) + (b_y >> is_luma) * s->mb_stride];
252 int left_intra = IS_INTRA(s->cur_pic.mb_type[( b_x >> is_luma) + (b_y >> is_luma) * s->mb_stride]);
253 int right_intra = IS_INTRA(s->cur_pic.mb_type[((b_x + 1) >> is_luma) + (b_y >> is_luma) * s->mb_stride]);
254 int left_damage = left_status & ER_MB_ERROR;
255 int right_damage = right_status & ER_MB_ERROR;
256 int offset = b_x * 8 + b_y * stride * 8;
257 int16_t *left_mv = s->cur_pic.motion_val[0][mvy_stride * b_y + mvx_stride * b_x];
258 int16_t *right_mv = s->cur_pic.motion_val[0][mvy_stride * b_y + mvx_stride * (b_x + 1)];
259 if (!(left_damage || right_damage))
260 continue; // both undamaged
261 if ((!left_intra) && (!right_intra) &&
262 FFABS(left_mv[0] - right_mv[0]) +
263 FFABS(left_mv[1] + right_mv[1]) < 2)
266 for (y = 0; y < 8; y++) {
269 a = dst[offset + 7 + y * stride] - dst[offset + 6 + y * stride];
270 b = dst[offset + 8 + y * stride] - dst[offset + 7 + y * stride];
271 c = dst[offset + 9 + y * stride] - dst[offset + 8 + y * stride];
273 d = FFABS(b) - ((FFABS(a) + FFABS(c) + 1) >> 1);
281 if (!(left_damage && right_damage))
285 dst[offset + 7 + y * stride] = cm[dst[offset + 7 + y * stride] + ((d * 7) >> 4)];
286 dst[offset + 6 + y * stride] = cm[dst[offset + 6 + y * stride] + ((d * 5) >> 4)];
287 dst[offset + 5 + y * stride] = cm[dst[offset + 5 + y * stride] + ((d * 3) >> 4)];
288 dst[offset + 4 + y * stride] = cm[dst[offset + 4 + y * stride] + ((d * 1) >> 4)];
291 dst[offset + 8 + y * stride] = cm[dst[offset + 8 + y * stride] - ((d * 7) >> 4)];
292 dst[offset + 9 + y * stride] = cm[dst[offset + 9 + y * stride] - ((d * 5) >> 4)];
293 dst[offset + 10+ y * stride] = cm[dst[offset + 10 + y * stride] - ((d * 3) >> 4)];
294 dst[offset + 11+ y * stride] = cm[dst[offset + 11 + y * stride] - ((d * 1) >> 4)];
302 * simple vertical deblocking filter used for error resilience
303 * @param w width in 8 pixel blocks
304 * @param h height in 8 pixel blocks
306 static void v_block_filter(ERContext *s, uint8_t *dst, int w, int h,
307 int stride, int is_luma)
309 int b_x, b_y, mvx_stride, mvy_stride;
310 const uint8_t *cm = ff_crop_tab + MAX_NEG_CROP;
311 set_mv_strides(s, &mvx_stride, &mvy_stride);
312 mvx_stride >>= is_luma;
313 mvy_stride *= mvx_stride;
315 for (b_y = 0; b_y < h - 1; b_y++) {
316 for (b_x = 0; b_x < w; b_x++) {
318 int top_status = s->error_status_table[(b_x >> is_luma) + (b_y >> is_luma) * s->mb_stride];
319 int bottom_status = s->error_status_table[(b_x >> is_luma) + ((b_y + 1) >> is_luma) * s->mb_stride];
320 int top_intra = IS_INTRA(s->cur_pic.mb_type[(b_x >> is_luma) + ( b_y >> is_luma) * s->mb_stride]);
321 int bottom_intra = IS_INTRA(s->cur_pic.mb_type[(b_x >> is_luma) + ((b_y + 1) >> is_luma) * s->mb_stride]);
322 int top_damage = top_status & ER_MB_ERROR;
323 int bottom_damage = bottom_status & ER_MB_ERROR;
324 int offset = b_x * 8 + b_y * stride * 8;
326 int16_t *top_mv = s->cur_pic.motion_val[0][mvy_stride * b_y + mvx_stride * b_x];
327 int16_t *bottom_mv = s->cur_pic.motion_val[0][mvy_stride * (b_y + 1) + mvx_stride * b_x];
329 if (!(top_damage || bottom_damage))
330 continue; // both undamaged
332 if ((!top_intra) && (!bottom_intra) &&
333 FFABS(top_mv[0] - bottom_mv[0]) +
334 FFABS(top_mv[1] + bottom_mv[1]) < 2)
337 for (x = 0; x < 8; x++) {
340 a = dst[offset + x + 7 * stride] - dst[offset + x + 6 * stride];
341 b = dst[offset + x + 8 * stride] - dst[offset + x + 7 * stride];
342 c = dst[offset + x + 9 * stride] - dst[offset + x + 8 * stride];
344 d = FFABS(b) - ((FFABS(a) + FFABS(c) + 1) >> 1);
352 if (!(top_damage && bottom_damage))
356 dst[offset + x + 7 * stride] = cm[dst[offset + x + 7 * stride] + ((d * 7) >> 4)];
357 dst[offset + x + 6 * stride] = cm[dst[offset + x + 6 * stride] + ((d * 5) >> 4)];
358 dst[offset + x + 5 * stride] = cm[dst[offset + x + 5 * stride] + ((d * 3) >> 4)];
359 dst[offset + x + 4 * stride] = cm[dst[offset + x + 4 * stride] + ((d * 1) >> 4)];
362 dst[offset + x + 8 * stride] = cm[dst[offset + x + 8 * stride] - ((d * 7) >> 4)];
363 dst[offset + x + 9 * stride] = cm[dst[offset + x + 9 * stride] - ((d * 5) >> 4)];
364 dst[offset + x + 10 * stride] = cm[dst[offset + x + 10 * stride] - ((d * 3) >> 4)];
365 dst[offset + x + 11 * stride] = cm[dst[offset + x + 11 * stride] - ((d * 1) >> 4)];
372 static void guess_mv(ERContext *s)
374 uint8_t *fixed = s->er_temp_buffer;
377 #define MV_UNCHANGED 1
378 const int mb_stride = s->mb_stride;
379 const int mb_width = s->mb_width;
380 const int mb_height = s->mb_height;
381 int i, depth, num_avail;
382 int mb_x, mb_y, mot_step, mot_stride;
384 set_mv_strides(s, &mot_step, &mot_stride);
387 for (i = 0; i < s->mb_num; i++) {
388 const int mb_xy = s->mb_index2xy[i];
390 int error = s->error_status_table[mb_xy];
392 if (IS_INTRA(s->cur_pic.mb_type[mb_xy]))
393 f = MV_FROZEN; // intra // FIXME check
394 if (!(error & ER_MV_ERROR))
395 f = MV_FROZEN; // inter with undamaged MV
400 else if(s->last_pic.f->data[0] && s->last_pic.motion_val[0]){
401 const int mb_y= mb_xy / s->mb_stride;
402 const int mb_x= mb_xy % s->mb_stride;
403 const int mot_index= (mb_x + mb_y*mot_stride) * mot_step;
404 s->cur_pic.motion_val[0][mot_index][0]= s->last_pic.motion_val[0][mot_index][0];
405 s->cur_pic.motion_val[0][mot_index][1]= s->last_pic.motion_val[0][mot_index][1];
406 s->cur_pic.ref_index[0][4*mb_xy] = s->last_pic.ref_index[0][4*mb_xy];
410 if ((!(s->avctx->error_concealment&FF_EC_GUESS_MVS)) ||
411 num_avail <= mb_width / 2) {
412 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
413 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
414 const int mb_xy = mb_x + mb_y * s->mb_stride;
415 int mv_dir = (s->last_pic.f && s->last_pic.f->data[0]) ? MV_DIR_FORWARD : MV_DIR_BACKWARD;
417 if (IS_INTRA(s->cur_pic.mb_type[mb_xy]))
419 if (!(s->error_status_table[mb_xy] & ER_MV_ERROR))
424 s->decode_mb(s->opaque, 0, mv_dir, MV_TYPE_16X16, &s->mv,
431 for (depth = 0; ; depth++) {
432 int changed, pass, none_left;
436 for (pass = 0; (changed || pass < 2) && pass < 10; pass++) {
441 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
442 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
443 const int mb_xy = mb_x + mb_y * s->mb_stride;
444 int mv_predictor[8][2] = { { 0 } };
448 int best_score = 256 * 256 * 256 * 64;
450 const int mot_index = (mb_x + mb_y * mot_stride) * mot_step;
451 int prev_x, prev_y, prev_ref;
453 if ((mb_x ^ mb_y ^ pass) & 1)
456 if (fixed[mb_xy] == MV_FROZEN)
458 av_assert1(!IS_INTRA(s->cur_pic.mb_type[mb_xy]));
459 av_assert1(s->last_pic.f && s->last_pic.f->data[0]);
462 if (mb_x > 0 && fixed[mb_xy - 1] == MV_FROZEN)
464 if (mb_x + 1 < mb_width && fixed[mb_xy + 1] == MV_FROZEN)
466 if (mb_y > 0 && fixed[mb_xy - mb_stride] == MV_FROZEN)
468 if (mb_y + 1 < mb_height && fixed[mb_xy + mb_stride] == MV_FROZEN)
474 if (mb_x > 0 && fixed[mb_xy - 1 ] == MV_CHANGED)
476 if (mb_x + 1 < mb_width && fixed[mb_xy + 1 ] == MV_CHANGED)
478 if (mb_y > 0 && fixed[mb_xy - mb_stride] == MV_CHANGED)
480 if (mb_y + 1 < mb_height && fixed[mb_xy + mb_stride] == MV_CHANGED)
482 if (j == 0 && pass > 1)
487 if (mb_x > 0 && fixed[mb_xy - 1]) {
488 mv_predictor[pred_count][0] =
489 s->cur_pic.motion_val[0][mot_index - mot_step][0];
490 mv_predictor[pred_count][1] =
491 s->cur_pic.motion_val[0][mot_index - mot_step][1];
493 s->cur_pic.ref_index[0][4 * (mb_xy - 1)];
496 if (mb_x + 1 < mb_width && 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];
502 s->cur_pic.ref_index[0][4 * (mb_xy + 1)];
505 if (mb_y > 0 && fixed[mb_xy - mb_stride]) {
506 mv_predictor[pred_count][0] =
507 s->cur_pic.motion_val[0][mot_index - mot_stride * mot_step][0];
508 mv_predictor[pred_count][1] =
509 s->cur_pic.motion_val[0][mot_index - mot_stride * mot_step][1];
511 s->cur_pic.ref_index[0][4 * (mb_xy - s->mb_stride)];
514 if (mb_y + 1<mb_height && 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];
520 s->cur_pic.ref_index[0][4 * (mb_xy + s->mb_stride)];
526 if (pred_count > 1) {
527 int sum_x = 0, sum_y = 0, sum_r = 0;
528 int max_x, max_y, min_x, min_y, max_r, min_r;
530 for (j = 0; j < pred_count; j++) {
531 sum_x += mv_predictor[j][0];
532 sum_y += mv_predictor[j][1];
534 if (j && ref[j] != ref[j - 1])
535 goto skip_mean_and_median;
539 mv_predictor[pred_count][0] = sum_x / j;
540 mv_predictor[pred_count][1] = sum_y / j;
541 ref[pred_count] = sum_r / j;
544 if (pred_count >= 3) {
545 min_y = min_x = min_r = 99999;
546 max_y = max_x = max_r = -99999;
548 min_x = min_y = max_x = max_y = min_r = max_r = 0;
550 for (j = 0; j < pred_count; j++) {
551 max_x = FFMAX(max_x, mv_predictor[j][0]);
552 max_y = FFMAX(max_y, mv_predictor[j][1]);
553 max_r = FFMAX(max_r, ref[j]);
554 min_x = FFMIN(min_x, mv_predictor[j][0]);
555 min_y = FFMIN(min_y, mv_predictor[j][1]);
556 min_r = FFMIN(min_r, ref[j]);
558 mv_predictor[pred_count + 1][0] = sum_x - max_x - min_x;
559 mv_predictor[pred_count + 1][1] = sum_y - max_y - min_y;
560 ref[pred_count + 1] = sum_r - max_r - min_r;
562 if (pred_count == 4) {
563 mv_predictor[pred_count + 1][0] /= 2;
564 mv_predictor[pred_count + 1][1] /= 2;
565 ref[pred_count + 1] /= 2;
570 skip_mean_and_median:
574 if (!fixed[mb_xy] && 0) {
575 if (s->avctx->codec_id == AV_CODEC_ID_H264) {
578 ff_thread_await_progress(s->last_pic.tf,
581 if (!s->last_pic.motion_val[0] ||
582 !s->last_pic.ref_index[0])
584 prev_x = s->last_pic.motion_val[0][mot_index][0];
585 prev_y = s->last_pic.motion_val[0][mot_index][1];
586 prev_ref = s->last_pic.ref_index[0][4 * mb_xy];
588 prev_x = s->cur_pic.motion_val[0][mot_index][0];
589 prev_y = s->cur_pic.motion_val[0][mot_index][1];
590 prev_ref = s->cur_pic.ref_index[0][4 * mb_xy];
594 mv_predictor[pred_count][0] = prev_x;
595 mv_predictor[pred_count][1] = prev_y;
596 ref[pred_count] = prev_ref;
601 for (j = 0; j < pred_count; j++) {
602 int *linesize = s->cur_pic.f->linesize;
604 uint8_t *src = s->cur_pic.f->data[0] +
605 mb_x * 16 + mb_y * 16 * linesize[0];
607 s->cur_pic.motion_val[0][mot_index][0] =
608 s->mv[0][0][0] = mv_predictor[j][0];
609 s->cur_pic.motion_val[0][mot_index][1] =
610 s->mv[0][0][1] = mv_predictor[j][1];
612 // predictor intra or otherwise not available
616 s->decode_mb(s->opaque, ref[j], MV_DIR_FORWARD,
617 MV_TYPE_16X16, &s->mv, mb_x, mb_y, 0, 0);
619 if (mb_x > 0 && fixed[mb_xy - 1]) {
621 for (k = 0; k < 16; k++)
622 score += FFABS(src[k * linesize[0] - 1] -
623 src[k * linesize[0]]);
625 if (mb_x + 1 < mb_width && fixed[mb_xy + 1]) {
627 for (k = 0; k < 16; k++)
628 score += FFABS(src[k * linesize[0] + 15] -
629 src[k * linesize[0] + 16]);
631 if (mb_y > 0 && fixed[mb_xy - mb_stride]) {
633 for (k = 0; k < 16; k++)
634 score += FFABS(src[k - linesize[0]] - src[k]);
636 if (mb_y + 1 < mb_height && fixed[mb_xy + mb_stride]) {
638 for (k = 0; k < 16; k++)
639 score += FFABS(src[k + linesize[0] * 15] -
640 src[k + linesize[0] * 16]);
643 if (score <= best_score) { // <= will favor the last MV
648 score_sum += best_score;
649 s->mv[0][0][0] = mv_predictor[best_pred][0];
650 s->mv[0][0][1] = mv_predictor[best_pred][1];
652 for (i = 0; i < mot_step; i++)
653 for (j = 0; j < mot_step; j++) {
654 s->cur_pic.motion_val[0][mot_index + i + j * mot_stride][0] = s->mv[0][0][0];
655 s->cur_pic.motion_val[0][mot_index + i + j * mot_stride][1] = s->mv[0][0][1];
658 s->decode_mb(s->opaque, ref[best_pred], MV_DIR_FORWARD,
659 MV_TYPE_16X16, &s->mv, mb_x, mb_y, 0, 0);
662 if (s->mv[0][0][0] != prev_x || s->mv[0][0][1] != prev_y) {
663 fixed[mb_xy] = MV_CHANGED;
666 fixed[mb_xy] = MV_UNCHANGED;
674 for (i = 0; i < s->mb_num; i++) {
675 int mb_xy = s->mb_index2xy[i];
677 fixed[mb_xy] = MV_FROZEN;
682 static int is_intra_more_likely(ERContext *s)
684 int is_intra_likely, i, j, undamaged_count, skip_amount, mb_x, mb_y;
686 if (!s->last_pic.f || !s->last_pic.f->data[0])
687 return 1; // no previous frame available -> use spatial prediction
690 for (i = 0; i < s->mb_num; i++) {
691 const int mb_xy = s->mb_index2xy[i];
692 const int error = s->error_status_table[mb_xy];
693 if (!((error & ER_DC_ERROR) && (error & ER_MV_ERROR)))
697 if (s->avctx->codec_id == AV_CODEC_ID_H264 && s->ref_count <= 0)
700 if (undamaged_count < 5)
701 return 0; // almost all MBs damaged -> use temporal prediction
703 // prevent dsp.sad() check, that requires access to the image
705 s->avctx->hwaccel && s->avctx->hwaccel->decode_mb &&
706 s->cur_pic.f->pict_type == AV_PICTURE_TYPE_I)
709 skip_amount = FFMAX(undamaged_count / 50, 1); // check only up to 50 MBs
713 for (mb_y = 0; mb_y < s->mb_height - 1; mb_y++) {
714 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
716 const int mb_xy = mb_x + mb_y * s->mb_stride;
718 error = s->error_status_table[mb_xy];
719 if ((error & ER_DC_ERROR) && (error & ER_MV_ERROR))
720 continue; // skip damaged
723 // skip a few to speed things up
724 if ((j % skip_amount) != 0)
727 if (s->cur_pic.f->pict_type == AV_PICTURE_TYPE_I) {
728 int *linesize = s->cur_pic.f->linesize;
729 uint8_t *mb_ptr = s->cur_pic.f->data[0] +
730 mb_x * 16 + mb_y * 16 * linesize[0];
731 uint8_t *last_mb_ptr = s->last_pic.f->data[0] +
732 mb_x * 16 + mb_y * 16 * linesize[0];
734 if (s->avctx->codec_id == AV_CODEC_ID_H264) {
737 ff_thread_await_progress(s->last_pic.tf, mb_y, 0);
739 is_intra_likely += s->dsp->sad[0](NULL, last_mb_ptr, mb_ptr,
741 // FIXME need await_progress() here
742 is_intra_likely -= s->dsp->sad[0](NULL, last_mb_ptr,
743 last_mb_ptr + linesize[0] * 16,
746 if (IS_INTRA(s->cur_pic.mb_type[mb_xy]))
753 // av_log(NULL, AV_LOG_ERROR, "is_intra_likely: %d type:%d\n", is_intra_likely, s->pict_type);
754 return is_intra_likely > 0;
757 void ff_er_frame_start(ERContext *s)
759 if (!s->avctx->error_concealment)
762 memset(s->error_status_table, ER_MB_ERROR | VP_START | ER_MB_END,
763 s->mb_stride * s->mb_height * sizeof(uint8_t));
764 s->error_count = 3 * s->mb_num;
765 s->error_occurred = 0;
768 static int er_supported(ERContext *s)
770 if(s->avctx->hwaccel && s->avctx->hwaccel->decode_slice ||
771 s->avctx->codec->capabilities&CODEC_CAP_HWACCEL_VDPAU ||
773 s->cur_pic.field_picture
781 * @param endx x component of the last macroblock, can be -1
782 * for the last of the previous line
783 * @param status the status at the end (ER_MV_END, ER_AC_ERROR, ...), it is
784 * assumed that no earlier end or error of the same type occurred
786 void ff_er_add_slice(ERContext *s, int startx, int starty,
787 int endx, int endy, int status)
789 const int start_i = av_clip(startx + starty * s->mb_width, 0, s->mb_num - 1);
790 const int end_i = av_clip(endx + endy * s->mb_width, 0, s->mb_num);
791 const int start_xy = s->mb_index2xy[start_i];
792 const int end_xy = s->mb_index2xy[end_i];
795 if (s->avctx->hwaccel && s->avctx->hwaccel->decode_slice)
798 if (start_i > end_i || start_xy > end_xy) {
799 av_log(s->avctx, AV_LOG_ERROR,
800 "internal error, slice end before start\n");
804 if (!s->avctx->error_concealment)
808 if (status & (ER_AC_ERROR | ER_AC_END)) {
809 mask &= ~(ER_AC_ERROR | ER_AC_END);
810 s->error_count -= end_i - start_i + 1;
812 if (status & (ER_DC_ERROR | ER_DC_END)) {
813 mask &= ~(ER_DC_ERROR | ER_DC_END);
814 s->error_count -= end_i - start_i + 1;
816 if (status & (ER_MV_ERROR | ER_MV_END)) {
817 mask &= ~(ER_MV_ERROR | ER_MV_END);
818 s->error_count -= end_i - start_i + 1;
821 if (status & ER_MB_ERROR) {
822 s->error_occurred = 1;
823 s->error_count = INT_MAX;
827 memset(&s->error_status_table[start_xy], 0,
828 (end_xy - start_xy) * sizeof(uint8_t));
831 for (i = start_xy; i < end_xy; i++)
832 s->error_status_table[i] &= mask;
835 if (end_i == s->mb_num)
836 s->error_count = INT_MAX;
838 s->error_status_table[end_xy] &= mask;
839 s->error_status_table[end_xy] |= status;
842 s->error_status_table[start_xy] |= VP_START;
844 if (start_xy > 0 && !(s->avctx->active_thread_type & FF_THREAD_SLICE) &&
845 er_supported(s) && s->avctx->skip_top * s->mb_width < start_i) {
846 int prev_status = s->error_status_table[s->mb_index2xy[start_i - 1]];
848 prev_status &= ~ VP_START;
849 if (prev_status != (ER_MV_END | ER_DC_END | ER_AC_END)) {
850 s->error_occurred = 1;
851 s->error_count = INT_MAX;
856 void ff_er_frame_end(ERContext *s)
858 int *linesize = s->cur_pic.f->linesize;
859 int i, mb_x, mb_y, error, error_type, dc_error, mv_error, ac_error;
861 int threshold_part[4] = { 100, 100, 100 };
864 int size = s->b8_stride * 2 * s->mb_height;
866 /* We do not support ER of field pictures yet,
867 * though it should not crash if enabled. */
868 if (!s->avctx->error_concealment || s->error_count == 0 ||
871 s->error_count == 3 * s->mb_width *
872 (s->avctx->skip_top + s->avctx->skip_bottom)) {
875 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
876 int status = s->error_status_table[mb_x + (s->mb_height - 1) * s->mb_stride];
881 if ( mb_x == s->mb_width
882 && s->avctx->codec_id == AV_CODEC_ID_MPEG2VIDEO
883 && (s->avctx->height&16)
884 && s->error_count == 3 * s->mb_width * (s->avctx->skip_top + s->avctx->skip_bottom + 1)
886 av_log(s->avctx, AV_LOG_DEBUG, "ignoring last missing slice\n");
891 if (s->last_pic.f->width != s->cur_pic.f->width ||
892 s->last_pic.f->height != s->cur_pic.f->height ||
893 s->last_pic.f->format != s->cur_pic.f->format) {
894 av_log(s->avctx, AV_LOG_WARNING, "Cannot use previous picture in error concealment\n");
895 memset(&s->last_pic, 0, sizeof(s->last_pic));
899 if (s->next_pic.f->width != s->cur_pic.f->width ||
900 s->next_pic.f->height != s->cur_pic.f->height ||
901 s->next_pic.f->format != s->cur_pic.f->format) {
902 av_log(s->avctx, AV_LOG_WARNING, "Cannot use next picture in error concealment\n");
903 memset(&s->next_pic, 0, sizeof(s->next_pic));
907 if (!s->cur_pic.motion_val[0] || !s->cur_pic.ref_index[0]) {
908 av_log(s->avctx, AV_LOG_ERROR, "Warning MVs not available\n");
910 for (i = 0; i < 2; i++) {
911 s->ref_index_buf[i] = av_buffer_allocz(s->mb_stride * s->mb_height * 4 * sizeof(uint8_t));
912 s->motion_val_buf[i] = av_buffer_allocz((size + 4) * 2 * sizeof(uint16_t));
913 if (!s->ref_index_buf[i] || !s->motion_val_buf[i])
915 s->cur_pic.ref_index[i] = s->ref_index_buf[i]->data;
916 s->cur_pic.motion_val[i] = (int16_t (*)[2])s->motion_val_buf[i]->data + 4;
919 for (i = 0; i < 2; i++) {
920 av_buffer_unref(&s->ref_index_buf[i]);
921 av_buffer_unref(&s->motion_val_buf[i]);
922 s->cur_pic.ref_index[i] = NULL;
923 s->cur_pic.motion_val[i] = NULL;
929 if (s->avctx->debug & FF_DEBUG_ER) {
930 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
931 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
932 int status = s->error_status_table[mb_x + mb_y * s->mb_stride];
934 av_log(s->avctx, AV_LOG_DEBUG, "%2X ", status);
936 av_log(s->avctx, AV_LOG_DEBUG, "\n");
941 /* handle overlapping slices */
942 for (error_type = 1; error_type <= 3; error_type++) {
945 for (i = s->mb_num - 1; i >= 0; i--) {
946 const int mb_xy = s->mb_index2xy[i];
947 int error = s->error_status_table[mb_xy];
949 if (error & (1 << error_type))
951 if (error & (8 << error_type))
955 s->error_status_table[mb_xy] |= 1 << error_type;
957 if (error & VP_START)
963 /* handle slices with partitions of different length */
964 if (s->partitioned_frame) {
967 for (i = s->mb_num - 1; i >= 0; i--) {
968 const int mb_xy = s->mb_index2xy[i];
969 int error = s->error_status_table[mb_xy];
971 if (error & ER_AC_END)
973 if ((error & ER_MV_END) ||
974 (error & ER_DC_END) ||
975 (error & ER_AC_ERROR))
979 s->error_status_table[mb_xy]|= ER_AC_ERROR;
981 if (error & VP_START)
986 /* handle missing slices */
987 if (s->avctx->err_recognition & AV_EF_EXPLODE) {
991 for (i = s->mb_num - 2; i >= s->mb_width + 100; i--) {
992 const int mb_xy = s->mb_index2xy[i];
993 int error1 = s->error_status_table[mb_xy];
994 int error2 = s->error_status_table[s->mb_index2xy[i + 1]];
996 if (error1 & VP_START)
999 if (error2 == (VP_START | ER_MB_ERROR | ER_MB_END) &&
1000 error1 != (VP_START | ER_MB_ERROR | ER_MB_END) &&
1001 ((error1 & ER_AC_END) || (error1 & ER_DC_END) ||
1002 (error1 & ER_MV_END))) {
1008 s->error_status_table[mb_xy] |= ER_MB_ERROR;
1013 /* backward mark errors */
1015 for (error_type = 1; error_type <= 3; error_type++) {
1016 for (i = s->mb_num - 1; i >= 0; i--) {
1017 const int mb_xy = s->mb_index2xy[i];
1018 int error = s->error_status_table[mb_xy];
1020 if (!s->mbskip_table[mb_xy]) // FIXME partition specific
1022 if (error & (1 << error_type))
1025 if (s->partitioned_frame) {
1026 if (distance < threshold_part[error_type - 1])
1027 s->error_status_table[mb_xy] |= 1 << error_type;
1029 if (distance < threshold)
1030 s->error_status_table[mb_xy] |= 1 << error_type;
1033 if (error & VP_START)
1039 /* forward mark errors */
1041 for (i = 0; i < s->mb_num; i++) {
1042 const int mb_xy = s->mb_index2xy[i];
1043 int old_error = s->error_status_table[mb_xy];
1045 if (old_error & VP_START) {
1046 error = old_error & ER_MB_ERROR;
1048 error |= old_error & ER_MB_ERROR;
1049 s->error_status_table[mb_xy] |= error;
1053 /* handle not partitioned case */
1054 if (!s->partitioned_frame) {
1055 for (i = 0; i < s->mb_num; i++) {
1056 const int mb_xy = s->mb_index2xy[i];
1057 error = s->error_status_table[mb_xy];
1058 if (error & ER_MB_ERROR)
1059 error |= ER_MB_ERROR;
1060 s->error_status_table[mb_xy] = error;
1065 dc_error = ac_error = mv_error = 0;
1066 for (i = 0; i < s->mb_num; i++) {
1067 const int mb_xy = s->mb_index2xy[i];
1068 error = s->error_status_table[mb_xy];
1069 if (error & ER_DC_ERROR)
1071 if (error & ER_AC_ERROR)
1073 if (error & ER_MV_ERROR)
1076 av_log(s->avctx, AV_LOG_INFO, "concealing %d DC, %d AC, %d MV errors in %c frame\n",
1077 dc_error, ac_error, mv_error, av_get_picture_type_char(s->cur_pic.f->pict_type));
1079 is_intra_likely = is_intra_more_likely(s);
1081 /* set unknown mb-type to most likely */
1082 for (i = 0; i < s->mb_num; i++) {
1083 const int mb_xy = s->mb_index2xy[i];
1084 error = s->error_status_table[mb_xy];
1085 if (!((error & ER_DC_ERROR) && (error & ER_MV_ERROR)))
1088 if (is_intra_likely)
1089 s->cur_pic.mb_type[mb_xy] = MB_TYPE_INTRA4x4;
1091 s->cur_pic.mb_type[mb_xy] = MB_TYPE_16x16 | MB_TYPE_L0;
1094 // change inter to intra blocks if no reference frames are available
1095 if (!(s->last_pic.f && s->last_pic.f->data[0]) &&
1096 !(s->next_pic.f && s->next_pic.f->data[0]))
1097 for (i = 0; i < s->mb_num; i++) {
1098 const int mb_xy = s->mb_index2xy[i];
1099 if (!IS_INTRA(s->cur_pic.mb_type[mb_xy]))
1100 s->cur_pic.mb_type[mb_xy] = MB_TYPE_INTRA4x4;
1103 /* handle inter blocks with damaged AC */
1104 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1105 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1106 const int mb_xy = mb_x + mb_y * s->mb_stride;
1107 const int mb_type = s->cur_pic.mb_type[mb_xy];
1108 const int dir = !(s->last_pic.f && s->last_pic.f->data[0]);
1109 const int mv_dir = dir ? MV_DIR_BACKWARD : MV_DIR_FORWARD;
1112 error = s->error_status_table[mb_xy];
1114 if (IS_INTRA(mb_type))
1116 if (error & ER_MV_ERROR)
1117 continue; // inter with damaged MV
1118 if (!(error & ER_AC_ERROR))
1119 continue; // undamaged inter
1121 if (IS_8X8(mb_type)) {
1122 int mb_index = mb_x * 2 + mb_y * 2 * s->b8_stride;
1124 mv_type = MV_TYPE_8X8;
1125 for (j = 0; j < 4; j++) {
1126 s->mv[0][j][0] = s->cur_pic.motion_val[dir][mb_index + (j & 1) + (j >> 1) * s->b8_stride][0];
1127 s->mv[0][j][1] = s->cur_pic.motion_val[dir][mb_index + (j & 1) + (j >> 1) * s->b8_stride][1];
1130 mv_type = MV_TYPE_16X16;
1131 s->mv[0][0][0] = s->cur_pic.motion_val[dir][mb_x * 2 + mb_y * 2 * s->b8_stride][0];
1132 s->mv[0][0][1] = s->cur_pic.motion_val[dir][mb_x * 2 + mb_y * 2 * s->b8_stride][1];
1135 s->decode_mb(s->opaque, 0 /* FIXME h264 partitioned slices need this set */,
1136 mv_dir, mv_type, &s->mv, mb_x, mb_y, 0, 0);
1141 if (s->cur_pic.f->pict_type == AV_PICTURE_TYPE_B) {
1142 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1143 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1144 int xy = mb_x * 2 + mb_y * 2 * s->b8_stride;
1145 const int mb_xy = mb_x + mb_y * s->mb_stride;
1146 const int mb_type = s->cur_pic.mb_type[mb_xy];
1147 int mv_dir = MV_DIR_FORWARD | MV_DIR_BACKWARD;
1149 error = s->error_status_table[mb_xy];
1151 if (IS_INTRA(mb_type))
1153 if (!(error & ER_MV_ERROR))
1154 continue; // inter with undamaged MV
1155 if (!(error & ER_AC_ERROR))
1156 continue; // undamaged inter
1158 if (!(s->last_pic.f && s->last_pic.f->data[0]))
1159 mv_dir &= ~MV_DIR_FORWARD;
1160 if (!(s->next_pic.f && s->next_pic.f->data[0]))
1161 mv_dir &= ~MV_DIR_BACKWARD;
1164 int time_pp = s->pp_time;
1165 int time_pb = s->pb_time;
1167 av_assert0(s->avctx->codec_id != AV_CODEC_ID_H264);
1168 ff_thread_await_progress(s->next_pic.tf, mb_y, 0);
1170 s->mv[0][0][0] = s->next_pic.motion_val[0][xy][0] * time_pb / time_pp;
1171 s->mv[0][0][1] = s->next_pic.motion_val[0][xy][1] * time_pb / time_pp;
1172 s->mv[1][0][0] = s->next_pic.motion_val[0][xy][0] * (time_pb - time_pp) / time_pp;
1173 s->mv[1][0][1] = s->next_pic.motion_val[0][xy][1] * (time_pb - time_pp) / time_pp;
1181 s->decode_mb(s->opaque, 0, mv_dir, MV_TYPE_16X16, &s->mv,
1188 /* the filters below manipulate raw image, skip them */
1189 if (CONFIG_XVMC && s->avctx->hwaccel && s->avctx->hwaccel->decode_mb)
1191 /* fill DC for inter blocks */
1192 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1193 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1194 int dc, dcu, dcv, y, n;
1196 uint8_t *dest_y, *dest_cb, *dest_cr;
1197 const int mb_xy = mb_x + mb_y * s->mb_stride;
1198 const int mb_type = s->cur_pic.mb_type[mb_xy];
1200 error = s->error_status_table[mb_xy];
1202 if (IS_INTRA(mb_type) && s->partitioned_frame)
1204 // if (error & ER_MV_ERROR)
1205 // continue; // inter data damaged FIXME is this good?
1207 dest_y = s->cur_pic.f->data[0] + mb_x * 16 + mb_y * 16 * linesize[0];
1208 dest_cb = s->cur_pic.f->data[1] + mb_x * 8 + mb_y * 8 * linesize[1];
1209 dest_cr = s->cur_pic.f->data[2] + mb_x * 8 + mb_y * 8 * linesize[2];
1211 dc_ptr = &s->dc_val[0][mb_x * 2 + mb_y * 2 * s->b8_stride];
1212 for (n = 0; n < 4; n++) {
1214 for (y = 0; y < 8; y++) {
1216 for (x = 0; x < 8; x++)
1217 dc += dest_y[x + (n & 1) * 8 +
1218 (y + (n >> 1) * 8) * linesize[0]];
1220 dc_ptr[(n & 1) + (n >> 1) * s->b8_stride] = (dc + 4) >> 3;
1224 for (y = 0; y < 8; y++) {
1226 for (x = 0; x < 8; x++) {
1227 dcu += dest_cb[x + y * linesize[1]];
1228 dcv += dest_cr[x + y * linesize[2]];
1231 s->dc_val[1][mb_x + mb_y * s->mb_stride] = (dcu + 4) >> 3;
1232 s->dc_val[2][mb_x + mb_y * s->mb_stride] = (dcv + 4) >> 3;
1236 /* guess DC for damaged blocks */
1237 guess_dc(s, s->dc_val[0], s->mb_width*2, s->mb_height*2, s->b8_stride, 1);
1238 guess_dc(s, s->dc_val[1], s->mb_width , s->mb_height , s->mb_stride, 0);
1239 guess_dc(s, s->dc_val[2], s->mb_width , s->mb_height , s->mb_stride, 0);
1242 /* filter luma DC */
1243 filter181(s->dc_val[0], s->mb_width * 2, s->mb_height * 2, s->b8_stride);
1246 /* render DC only intra */
1247 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1248 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1249 uint8_t *dest_y, *dest_cb, *dest_cr;
1250 const int mb_xy = mb_x + mb_y * s->mb_stride;
1251 const int mb_type = s->cur_pic.mb_type[mb_xy];
1253 error = s->error_status_table[mb_xy];
1255 if (IS_INTER(mb_type))
1257 if (!(error & ER_AC_ERROR))
1258 continue; // undamaged
1260 dest_y = s->cur_pic.f->data[0] + mb_x * 16 + mb_y * 16 * linesize[0];
1261 dest_cb = s->cur_pic.f->data[1] + mb_x * 8 + mb_y * 8 * linesize[1];
1262 dest_cr = s->cur_pic.f->data[2] + mb_x * 8 + mb_y * 8 * linesize[2];
1264 put_dc(s, dest_y, dest_cb, dest_cr, mb_x, mb_y);
1269 if (s->avctx->error_concealment & FF_EC_DEBLOCK) {
1270 /* filter horizontal block boundaries */
1271 h_block_filter(s, s->cur_pic.f->data[0], s->mb_width * 2,
1272 s->mb_height * 2, linesize[0], 1);
1273 h_block_filter(s, s->cur_pic.f->data[1], s->mb_width,
1274 s->mb_height, linesize[1], 0);
1275 h_block_filter(s, s->cur_pic.f->data[2], s->mb_width,
1276 s->mb_height, linesize[2], 0);
1278 /* filter vertical block boundaries */
1279 v_block_filter(s, s->cur_pic.f->data[0], s->mb_width * 2,
1280 s->mb_height * 2, linesize[0], 1);
1281 v_block_filter(s, s->cur_pic.f->data[1], s->mb_width,
1282 s->mb_height, linesize[1], 0);
1283 v_block_filter(s, s->cur_pic.f->data[2], s->mb_width,
1284 s->mb_height, linesize[2], 0);
1288 /* clean a few tables */
1289 for (i = 0; i < s->mb_num; i++) {
1290 const int mb_xy = s->mb_index2xy[i];
1291 int error = s->error_status_table[mb_xy];
1293 if (s->cur_pic.f->pict_type != AV_PICTURE_TYPE_B &&
1294 (error & (ER_DC_ERROR | ER_MV_ERROR | ER_AC_ERROR))) {
1295 s->mbskip_table[mb_xy] = 0;
1297 s->mbintra_table[mb_xy] = 1;
1300 for (i = 0; i < 2; i++) {
1301 av_buffer_unref(&s->ref_index_buf[i]);
1302 av_buffer_unref(&s->motion_val_buf[i]);
1303 s->cur_pic.ref_index[i] = NULL;
1304 s->cur_pic.motion_val[i] = NULL;
1307 memset(&s->cur_pic, 0, sizeof(ERPicture));
1308 memset(&s->last_pic, 0, sizeof(ERPicture));
1309 memset(&s->next_pic, 0, sizeof(ERPicture));