2 * Error resilience / concealment
4 * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
6 * This file is part of Libav.
8 * Libav 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 * Libav 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 Libav; 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 assert(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)
141 for (b_y = 0; b_y < h; b_y++) {
142 for (b_x = 0; b_x < w; b_x++) {
143 int color[4] = { 1024, 1024, 1024, 1024 };
144 int distance[4] = { 9999, 9999, 9999, 9999 };
145 int mb_index, error, j;
146 int64_t guess, weight_sum;
147 mb_index = (b_x >> is_luma) + (b_y >> is_luma) * s->mb_stride;
148 error = s->error_status_table[mb_index];
150 if (IS_INTER(s->cur_pic.mb_type[mb_index]))
152 if (!(error & ER_DC_ERROR))
156 for (j = b_x + 1; j < w; j++) {
157 int mb_index_j = (j >> is_luma) + (b_y >> is_luma) * s->mb_stride;
158 int error_j = s->error_status_table[mb_index_j];
159 int intra_j = IS_INTRA(s->cur_pic.mb_type[mb_index_j]);
160 if (intra_j == 0 || !(error_j & ER_DC_ERROR)) {
161 color[0] = dc[j + b_y * stride];
162 distance[0] = j - b_x;
168 for (j = b_x - 1; j >= 0; j--) {
169 int mb_index_j = (j >> is_luma) + (b_y >> is_luma) * s->mb_stride;
170 int error_j = s->error_status_table[mb_index_j];
171 int intra_j = IS_INTRA(s->cur_pic.mb_type[mb_index_j]);
172 if (intra_j == 0 || !(error_j & ER_DC_ERROR)) {
173 color[1] = dc[j + b_y * stride];
174 distance[1] = b_x - j;
180 for (j = b_y + 1; j < h; j++) {
181 int mb_index_j = (b_x >> is_luma) + (j >> is_luma) * s->mb_stride;
182 int error_j = s->error_status_table[mb_index_j];
183 int intra_j = IS_INTRA(s->cur_pic.mb_type[mb_index_j]);
185 if (intra_j == 0 || !(error_j & ER_DC_ERROR)) {
186 color[2] = dc[b_x + j * stride];
187 distance[2] = j - b_y;
193 for (j = b_y - 1; j >= 0; j--) {
194 int mb_index_j = (b_x >> is_luma) + (j >> is_luma) * s->mb_stride;
195 int error_j = s->error_status_table[mb_index_j];
196 int intra_j = IS_INTRA(s->cur_pic.mb_type[mb_index_j]);
197 if (intra_j == 0 || !(error_j & ER_DC_ERROR)) {
198 color[3] = dc[b_x + j * stride];
199 distance[3] = b_y - j;
206 for (j = 0; j < 4; j++) {
207 int64_t weight = 256 * 256 * 256 * 16 / distance[j];
208 guess += weight * (int64_t) color[j];
209 weight_sum += weight;
211 guess = (guess + weight_sum / 2) / weight_sum;
212 dc[b_x + b_y * stride] = guess;
218 * simple horizontal deblocking filter used for error resilience
219 * @param w width in 8 pixel blocks
220 * @param h height in 8 pixel blocks
222 static void h_block_filter(ERContext *s, uint8_t *dst, int w,
223 int h, int stride, int is_luma)
225 int b_x, b_y, mvx_stride, mvy_stride;
226 const uint8_t *cm = ff_crop_tab + MAX_NEG_CROP;
227 set_mv_strides(s, &mvx_stride, &mvy_stride);
228 mvx_stride >>= is_luma;
229 mvy_stride *= mvx_stride;
231 for (b_y = 0; b_y < h; b_y++) {
232 for (b_x = 0; b_x < w - 1; b_x++) {
234 int left_status = s->error_status_table[( b_x >> is_luma) + (b_y >> is_luma) * s->mb_stride];
235 int right_status = s->error_status_table[((b_x + 1) >> is_luma) + (b_y >> is_luma) * s->mb_stride];
236 int left_intra = IS_INTRA(s->cur_pic.mb_type[( b_x >> is_luma) + (b_y >> is_luma) * s->mb_stride]);
237 int right_intra = IS_INTRA(s->cur_pic.mb_type[((b_x + 1) >> is_luma) + (b_y >> is_luma) * s->mb_stride]);
238 int left_damage = left_status & ER_MB_ERROR;
239 int right_damage = right_status & ER_MB_ERROR;
240 int offset = b_x * 8 + b_y * stride * 8;
241 int16_t *left_mv = s->cur_pic.motion_val[0][mvy_stride * b_y + mvx_stride * b_x];
242 int16_t *right_mv = s->cur_pic.motion_val[0][mvy_stride * b_y + mvx_stride * (b_x + 1)];
243 if (!(left_damage || right_damage))
244 continue; // both undamaged
245 if ((!left_intra) && (!right_intra) &&
246 FFABS(left_mv[0] - right_mv[0]) +
247 FFABS(left_mv[1] + right_mv[1]) < 2)
250 for (y = 0; y < 8; y++) {
253 a = dst[offset + 7 + y * stride] - dst[offset + 6 + y * stride];
254 b = dst[offset + 8 + y * stride] - dst[offset + 7 + y * stride];
255 c = dst[offset + 9 + y * stride] - dst[offset + 8 + y * stride];
257 d = FFABS(b) - ((FFABS(a) + FFABS(c) + 1) >> 1);
265 if (!(left_damage && right_damage))
269 dst[offset + 7 + y * stride] = cm[dst[offset + 7 + y * stride] + ((d * 7) >> 4)];
270 dst[offset + 6 + y * stride] = cm[dst[offset + 6 + y * stride] + ((d * 5) >> 4)];
271 dst[offset + 5 + y * stride] = cm[dst[offset + 5 + y * stride] + ((d * 3) >> 4)];
272 dst[offset + 4 + y * stride] = cm[dst[offset + 4 + y * stride] + ((d * 1) >> 4)];
275 dst[offset + 8 + y * stride] = cm[dst[offset + 8 + y * stride] - ((d * 7) >> 4)];
276 dst[offset + 9 + y * stride] = cm[dst[offset + 9 + y * stride] - ((d * 5) >> 4)];
277 dst[offset + 10+ y * stride] = cm[dst[offset + 10 + y * stride] - ((d * 3) >> 4)];
278 dst[offset + 11+ y * stride] = cm[dst[offset + 11 + y * stride] - ((d * 1) >> 4)];
286 * simple vertical deblocking filter used for error resilience
287 * @param w width in 8 pixel blocks
288 * @param h height in 8 pixel blocks
290 static void v_block_filter(ERContext *s, uint8_t *dst, int w, int h,
291 int stride, int is_luma)
293 int b_x, b_y, mvx_stride, mvy_stride;
294 const uint8_t *cm = ff_crop_tab + MAX_NEG_CROP;
295 set_mv_strides(s, &mvx_stride, &mvy_stride);
296 mvx_stride >>= is_luma;
297 mvy_stride *= mvx_stride;
299 for (b_y = 0; b_y < h - 1; b_y++) {
300 for (b_x = 0; b_x < w; b_x++) {
302 int top_status = s->error_status_table[(b_x >> is_luma) + (b_y >> is_luma) * s->mb_stride];
303 int bottom_status = s->error_status_table[(b_x >> is_luma) + ((b_y + 1) >> is_luma) * s->mb_stride];
304 int top_intra = IS_INTRA(s->cur_pic.mb_type[(b_x >> is_luma) + ( b_y >> is_luma) * s->mb_stride]);
305 int bottom_intra = IS_INTRA(s->cur_pic.mb_type[(b_x >> is_luma) + ((b_y + 1) >> is_luma) * s->mb_stride]);
306 int top_damage = top_status & ER_MB_ERROR;
307 int bottom_damage = bottom_status & ER_MB_ERROR;
308 int offset = b_x * 8 + b_y * stride * 8;
310 int16_t *top_mv = s->cur_pic.motion_val[0][mvy_stride * b_y + mvx_stride * b_x];
311 int16_t *bottom_mv = s->cur_pic.motion_val[0][mvy_stride * (b_y + 1) + mvx_stride * b_x];
313 if (!(top_damage || bottom_damage))
314 continue; // both undamaged
316 if ((!top_intra) && (!bottom_intra) &&
317 FFABS(top_mv[0] - bottom_mv[0]) +
318 FFABS(top_mv[1] + bottom_mv[1]) < 2)
321 for (x = 0; x < 8; x++) {
324 a = dst[offset + x + 7 * stride] - dst[offset + x + 6 * stride];
325 b = dst[offset + x + 8 * stride] - dst[offset + x + 7 * stride];
326 c = dst[offset + x + 9 * stride] - dst[offset + x + 8 * stride];
328 d = FFABS(b) - ((FFABS(a) + FFABS(c) + 1) >> 1);
336 if (!(top_damage && bottom_damage))
340 dst[offset + x + 7 * stride] = cm[dst[offset + x + 7 * stride] + ((d * 7) >> 4)];
341 dst[offset + x + 6 * stride] = cm[dst[offset + x + 6 * stride] + ((d * 5) >> 4)];
342 dst[offset + x + 5 * stride] = cm[dst[offset + x + 5 * stride] + ((d * 3) >> 4)];
343 dst[offset + x + 4 * stride] = cm[dst[offset + x + 4 * stride] + ((d * 1) >> 4)];
346 dst[offset + x + 8 * stride] = cm[dst[offset + x + 8 * stride] - ((d * 7) >> 4)];
347 dst[offset + x + 9 * stride] = cm[dst[offset + x + 9 * stride] - ((d * 5) >> 4)];
348 dst[offset + x + 10 * stride] = cm[dst[offset + x + 10 * stride] - ((d * 3) >> 4)];
349 dst[offset + x + 11 * stride] = cm[dst[offset + x + 11 * stride] - ((d * 1) >> 4)];
356 static void guess_mv(ERContext *s)
358 uint8_t *fixed = s->er_temp_buffer;
361 #define MV_UNCHANGED 1
362 const int mb_stride = s->mb_stride;
363 const int mb_width = s->mb_width;
364 const int mb_height = s->mb_height;
365 int i, depth, num_avail;
366 int mb_x, mb_y, mot_step, mot_stride;
368 set_mv_strides(s, &mot_step, &mot_stride);
371 for (i = 0; i < s->mb_num; i++) {
372 const int mb_xy = s->mb_index2xy[i];
374 int error = s->error_status_table[mb_xy];
376 if (IS_INTRA(s->cur_pic.mb_type[mb_xy]))
377 f = MV_FROZEN; // intra // FIXME check
378 if (!(error & ER_MV_ERROR))
379 f = MV_FROZEN; // inter with undamaged MV
386 if ((!(s->avctx->error_concealment&FF_EC_GUESS_MVS)) ||
387 num_avail <= mb_width / 2) {
388 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
389 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
390 const int mb_xy = mb_x + mb_y * s->mb_stride;
391 int mv_dir = (s->last_pic.f && s->last_pic.f->data[0]) ? MV_DIR_FORWARD : MV_DIR_BACKWARD;
393 if (IS_INTRA(s->cur_pic.mb_type[mb_xy]))
395 if (!(s->error_status_table[mb_xy] & ER_MV_ERROR))
400 s->decode_mb(s->opaque, 0, mv_dir, MV_TYPE_16X16, &s->mv,
407 for (depth = 0; ; depth++) {
408 int changed, pass, none_left;
412 for (pass = 0; (changed || pass < 2) && pass < 10; pass++) {
417 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
418 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
419 const int mb_xy = mb_x + mb_y * s->mb_stride;
420 int mv_predictor[8][2] = { { 0 } };
424 int best_score = 256 * 256 * 256 * 64;
426 const int mot_index = (mb_x + mb_y * mot_stride) * mot_step;
427 int prev_x = 0, prev_y = 0, prev_ref = 0;
429 if ((mb_x ^ mb_y ^ pass) & 1)
432 if (fixed[mb_xy] == MV_FROZEN)
436 if (mb_x > 0 && fixed[mb_xy - 1] == MV_FROZEN)
438 if (mb_x + 1 < mb_width && fixed[mb_xy + 1] == MV_FROZEN)
440 if (mb_y > 0 && fixed[mb_xy - mb_stride] == MV_FROZEN)
442 if (mb_y + 1 < mb_height && fixed[mb_xy + mb_stride] == MV_FROZEN)
448 if (mb_x > 0 && fixed[mb_xy - 1 ] == MV_CHANGED)
450 if (mb_x + 1 < mb_width && fixed[mb_xy + 1 ] == MV_CHANGED)
452 if (mb_y > 0 && fixed[mb_xy - mb_stride] == MV_CHANGED)
454 if (mb_y + 1 < mb_height && fixed[mb_xy + mb_stride] == MV_CHANGED)
456 if (j == 0 && pass > 1)
461 if (mb_x > 0 && fixed[mb_xy - 1]) {
462 mv_predictor[pred_count][0] =
463 s->cur_pic.motion_val[0][mot_index - mot_step][0];
464 mv_predictor[pred_count][1] =
465 s->cur_pic.motion_val[0][mot_index - mot_step][1];
467 s->cur_pic.ref_index[0][4 * (mb_xy - 1)];
470 if (mb_x + 1 < mb_width && fixed[mb_xy + 1]) {
471 mv_predictor[pred_count][0] =
472 s->cur_pic.motion_val[0][mot_index + mot_step][0];
473 mv_predictor[pred_count][1] =
474 s->cur_pic.motion_val[0][mot_index + mot_step][1];
476 s->cur_pic.ref_index[0][4 * (mb_xy + 1)];
479 if (mb_y > 0 && fixed[mb_xy - mb_stride]) {
480 mv_predictor[pred_count][0] =
481 s->cur_pic.motion_val[0][mot_index - mot_stride * mot_step][0];
482 mv_predictor[pred_count][1] =
483 s->cur_pic.motion_val[0][mot_index - mot_stride * mot_step][1];
485 s->cur_pic.ref_index[0][4 * (mb_xy - s->mb_stride)];
488 if (mb_y + 1<mb_height && fixed[mb_xy + mb_stride]) {
489 mv_predictor[pred_count][0] =
490 s->cur_pic.motion_val[0][mot_index + mot_stride * mot_step][0];
491 mv_predictor[pred_count][1] =
492 s->cur_pic.motion_val[0][mot_index + mot_stride * mot_step][1];
494 s->cur_pic.ref_index[0][4 * (mb_xy + s->mb_stride)];
500 if (pred_count > 1) {
501 int sum_x = 0, sum_y = 0, sum_r = 0;
502 int max_x, max_y, min_x, min_y, max_r, min_r;
504 for (j = 0; j < pred_count; j++) {
505 sum_x += mv_predictor[j][0];
506 sum_y += mv_predictor[j][1];
508 if (j && ref[j] != ref[j - 1])
509 goto skip_mean_and_median;
513 mv_predictor[pred_count][0] = sum_x / j;
514 mv_predictor[pred_count][1] = sum_y / j;
515 ref[pred_count] = sum_r / j;
518 if (pred_count >= 3) {
519 min_y = min_x = min_r = 99999;
520 max_y = max_x = max_r = -99999;
522 min_x = min_y = max_x = max_y = min_r = max_r = 0;
524 for (j = 0; j < pred_count; j++) {
525 max_x = FFMAX(max_x, mv_predictor[j][0]);
526 max_y = FFMAX(max_y, mv_predictor[j][1]);
527 max_r = FFMAX(max_r, ref[j]);
528 min_x = FFMIN(min_x, mv_predictor[j][0]);
529 min_y = FFMIN(min_y, mv_predictor[j][1]);
530 min_r = FFMIN(min_r, ref[j]);
532 mv_predictor[pred_count + 1][0] = sum_x - max_x - min_x;
533 mv_predictor[pred_count + 1][1] = sum_y - max_y - min_y;
534 ref[pred_count + 1] = sum_r - max_r - min_r;
536 if (pred_count == 4) {
537 mv_predictor[pred_count + 1][0] /= 2;
538 mv_predictor[pred_count + 1][1] /= 2;
539 ref[pred_count + 1] /= 2;
544 skip_mean_and_median:
549 if (s->avctx->codec_id == AV_CODEC_ID_H264) {
552 ff_thread_await_progress(s->last_pic.tf,
555 if (!s->last_pic.motion_val[0] ||
556 !s->last_pic.ref_index[0])
558 prev_x = s->last_pic.motion_val[0][mot_index][0];
559 prev_y = s->last_pic.motion_val[0][mot_index][1];
560 prev_ref = s->last_pic.ref_index[0][4 * mb_xy];
562 prev_x = s->cur_pic.motion_val[0][mot_index][0];
563 prev_y = s->cur_pic.motion_val[0][mot_index][1];
564 prev_ref = s->cur_pic.ref_index[0][4 * mb_xy];
568 mv_predictor[pred_count][0] = prev_x;
569 mv_predictor[pred_count][1] = prev_y;
570 ref[pred_count] = prev_ref;
575 for (j = 0; j < pred_count; j++) {
576 int *linesize = s->cur_pic.f->linesize;
578 uint8_t *src = s->cur_pic.f->data[0] +
579 mb_x * 16 + mb_y * 16 * linesize[0];
581 s->cur_pic.motion_val[0][mot_index][0] =
582 s->mv[0][0][0] = mv_predictor[j][0];
583 s->cur_pic.motion_val[0][mot_index][1] =
584 s->mv[0][0][1] = mv_predictor[j][1];
586 // predictor intra or otherwise not available
590 s->decode_mb(s->opaque, ref[j], MV_DIR_FORWARD,
591 MV_TYPE_16X16, &s->mv, mb_x, mb_y, 0, 0);
593 if (mb_x > 0 && fixed[mb_xy - 1]) {
595 for (k = 0; k < 16; k++)
596 score += FFABS(src[k * linesize[0] - 1] -
597 src[k * linesize[0]]);
599 if (mb_x + 1 < mb_width && fixed[mb_xy + 1]) {
601 for (k = 0; k < 16; k++)
602 score += FFABS(src[k * linesize[0] + 15] -
603 src[k * linesize[0] + 16]);
605 if (mb_y > 0 && fixed[mb_xy - mb_stride]) {
607 for (k = 0; k < 16; k++)
608 score += FFABS(src[k - linesize[0]] - src[k]);
610 if (mb_y + 1 < mb_height && fixed[mb_xy + mb_stride]) {
612 for (k = 0; k < 16; k++)
613 score += FFABS(src[k + linesize[0] * 15] -
614 src[k + linesize[0] * 16]);
617 if (score <= best_score) { // <= will favor the last MV
622 score_sum += best_score;
623 s->mv[0][0][0] = mv_predictor[best_pred][0];
624 s->mv[0][0][1] = mv_predictor[best_pred][1];
626 for (i = 0; i < mot_step; i++)
627 for (j = 0; j < mot_step; j++) {
628 s->cur_pic.motion_val[0][mot_index + i + j * mot_stride][0] = s->mv[0][0][0];
629 s->cur_pic.motion_val[0][mot_index + i + j * mot_stride][1] = s->mv[0][0][1];
632 s->decode_mb(s->opaque, ref[best_pred], MV_DIR_FORWARD,
633 MV_TYPE_16X16, &s->mv, mb_x, mb_y, 0, 0);
636 if (s->mv[0][0][0] != prev_x || s->mv[0][0][1] != prev_y) {
637 fixed[mb_xy] = MV_CHANGED;
640 fixed[mb_xy] = MV_UNCHANGED;
648 for (i = 0; i < s->mb_num; i++) {
649 int mb_xy = s->mb_index2xy[i];
651 fixed[mb_xy] = MV_FROZEN;
656 static int is_intra_more_likely(ERContext *s)
658 int is_intra_likely, i, j, undamaged_count, skip_amount, mb_x, mb_y;
660 if (!s->last_pic.f || !s->last_pic.f->data[0])
661 return 1; // no previous frame available -> use spatial prediction
664 for (i = 0; i < s->mb_num; i++) {
665 const int mb_xy = s->mb_index2xy[i];
666 const int error = s->error_status_table[mb_xy];
667 if (!((error & ER_DC_ERROR) && (error & ER_MV_ERROR)))
671 if (s->avctx->codec_id == AV_CODEC_ID_H264 && s->ref_count <= 0)
674 if (undamaged_count < 5)
675 return 0; // almost all MBs damaged -> use temporal prediction
678 FF_DISABLE_DEPRECATION_WARNINGS
679 // prevent dsp.sad() check, that requires access to the image
680 if (CONFIG_MPEG_XVMC_DECODER &&
681 s->avctx->xvmc_acceleration &&
682 s->cur_pic.f->pict_type == AV_PICTURE_TYPE_I)
684 FF_ENABLE_DEPRECATION_WARNINGS
685 #endif /* FF_API_XVMC */
687 skip_amount = FFMAX(undamaged_count / 50, 1); // check only up to 50 MBs
691 for (mb_y = 0; mb_y < s->mb_height - 1; mb_y++) {
692 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
694 const int mb_xy = mb_x + mb_y * s->mb_stride;
696 error = s->error_status_table[mb_xy];
697 if ((error & ER_DC_ERROR) && (error & ER_MV_ERROR))
698 continue; // skip damaged
701 // skip a few to speed things up
702 if ((j % skip_amount) != 0)
705 if (s->cur_pic.f->pict_type == AV_PICTURE_TYPE_I) {
706 int *linesize = s->cur_pic.f->linesize;
707 uint8_t *mb_ptr = s->cur_pic.f->data[0] +
708 mb_x * 16 + mb_y * 16 * linesize[0];
709 uint8_t *last_mb_ptr = s->last_pic.f->data[0] +
710 mb_x * 16 + mb_y * 16 * linesize[0];
712 if (s->avctx->codec_id == AV_CODEC_ID_H264) {
715 ff_thread_await_progress(s->last_pic.tf, mb_y, 0);
717 is_intra_likely += s->mecc.sad[0](NULL, last_mb_ptr, mb_ptr,
719 is_intra_likely -= s->mecc.sad[0](NULL, last_mb_ptr,
720 last_mb_ptr + linesize[0] * 16,
723 if (IS_INTRA(s->cur_pic.mb_type[mb_xy]))
730 return is_intra_likely > 0;
733 void ff_er_frame_start(ERContext *s)
735 if (!s->avctx->error_concealment)
738 if (!s->mecc_inited) {
739 ff_me_cmp_init(&s->mecc, s->avctx);
743 memset(s->error_status_table, ER_MB_ERROR | VP_START | ER_MB_END,
744 s->mb_stride * s->mb_height * sizeof(uint8_t));
745 s->error_count = 3 * s->mb_num;
746 s->error_occurred = 0;
751 * @param endx x component of the last macroblock, can be -1
752 * for the last of the previous line
753 * @param status the status at the end (ER_MV_END, ER_AC_ERROR, ...), it is
754 * assumed that no earlier end or error of the same type occurred
756 void ff_er_add_slice(ERContext *s, int startx, int starty,
757 int endx, int endy, int status)
759 const int start_i = av_clip(startx + starty * s->mb_width, 0, s->mb_num - 1);
760 const int end_i = av_clip(endx + endy * s->mb_width, 0, s->mb_num);
761 const int start_xy = s->mb_index2xy[start_i];
762 const int end_xy = s->mb_index2xy[end_i];
765 if (s->avctx->hwaccel)
768 if (start_i > end_i || start_xy > end_xy) {
769 av_log(s->avctx, AV_LOG_ERROR,
770 "internal error, slice end before start\n");
774 if (!s->avctx->error_concealment)
778 if (status & (ER_AC_ERROR | ER_AC_END)) {
779 mask &= ~(ER_AC_ERROR | ER_AC_END);
780 s->error_count -= end_i - start_i + 1;
782 if (status & (ER_DC_ERROR | ER_DC_END)) {
783 mask &= ~(ER_DC_ERROR | ER_DC_END);
784 s->error_count -= end_i - start_i + 1;
786 if (status & (ER_MV_ERROR | ER_MV_END)) {
787 mask &= ~(ER_MV_ERROR | ER_MV_END);
788 s->error_count -= end_i - start_i + 1;
791 if (status & ER_MB_ERROR) {
792 s->error_occurred = 1;
793 s->error_count = INT_MAX;
797 memset(&s->error_status_table[start_xy], 0,
798 (end_xy - start_xy) * sizeof(uint8_t));
801 for (i = start_xy; i < end_xy; i++)
802 s->error_status_table[i] &= mask;
805 if (end_i == s->mb_num)
806 s->error_count = INT_MAX;
808 s->error_status_table[end_xy] &= mask;
809 s->error_status_table[end_xy] |= status;
812 s->error_status_table[start_xy] |= VP_START;
814 if (start_xy > 0 && s->avctx->thread_count <= 1 &&
815 s->avctx->skip_top * s->mb_width < start_i) {
816 int prev_status = s->error_status_table[s->mb_index2xy[start_i - 1]];
818 prev_status &= ~ VP_START;
819 if (prev_status != (ER_MV_END | ER_DC_END | ER_AC_END))
820 s->error_count = INT_MAX;
824 void ff_er_frame_end(ERContext *s)
826 int *linesize = s->cur_pic.f->linesize;
827 int i, mb_x, mb_y, error, error_type, dc_error, mv_error, ac_error;
829 int threshold_part[4] = { 100, 100, 100 };
833 /* We do not support ER of field pictures yet,
834 * though it should not crash if enabled. */
835 if (!s->avctx->error_concealment || s->error_count == 0 ||
838 s->cur_pic.field_picture ||
839 s->error_count == 3 * s->mb_width *
840 (s->avctx->skip_top + s->avctx->skip_bottom)) {
844 if (!s->cur_pic.motion_val[0] || !s->cur_pic.ref_index[0]) {
845 av_log(s->avctx, AV_LOG_ERROR, "MVs not available, ER not possible.\n");
849 if (s->avctx->debug & FF_DEBUG_ER) {
850 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
851 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
852 int status = s->error_status_table[mb_x + mb_y * s->mb_stride];
854 av_log(s->avctx, AV_LOG_DEBUG, "%2X ", status);
856 av_log(s->avctx, AV_LOG_DEBUG, "\n");
860 /* handle overlapping slices */
861 for (error_type = 1; error_type <= 3; error_type++) {
864 for (i = s->mb_num - 1; i >= 0; i--) {
865 const int mb_xy = s->mb_index2xy[i];
866 int error = s->error_status_table[mb_xy];
868 if (error & (1 << error_type))
870 if (error & (8 << error_type))
874 s->error_status_table[mb_xy] |= 1 << error_type;
876 if (error & VP_START)
881 /* handle slices with partitions of different length */
882 if (s->partitioned_frame) {
885 for (i = s->mb_num - 1; i >= 0; i--) {
886 const int mb_xy = s->mb_index2xy[i];
887 int error = s->error_status_table[mb_xy];
889 if (error & ER_AC_END)
891 if ((error & ER_MV_END) ||
892 (error & ER_DC_END) ||
893 (error & ER_AC_ERROR))
897 s->error_status_table[mb_xy]|= ER_AC_ERROR;
899 if (error & VP_START)
904 /* handle missing slices */
905 if (s->avctx->err_recognition & AV_EF_EXPLODE) {
909 for (i = s->mb_num - 2; i >= s->mb_width + 100; i--) {
910 const int mb_xy = s->mb_index2xy[i];
911 int error1 = s->error_status_table[mb_xy];
912 int error2 = s->error_status_table[s->mb_index2xy[i + 1]];
914 if (error1 & VP_START)
917 if (error2 == (VP_START | ER_MB_ERROR | ER_MB_END) &&
918 error1 != (VP_START | ER_MB_ERROR | ER_MB_END) &&
919 ((error1 & ER_AC_END) || (error1 & ER_DC_END) ||
920 (error1 & ER_MV_END))) {
926 s->error_status_table[mb_xy] |= ER_MB_ERROR;
930 /* backward mark errors */
932 for (error_type = 1; error_type <= 3; error_type++) {
933 for (i = s->mb_num - 1; i >= 0; i--) {
934 const int mb_xy = s->mb_index2xy[i];
935 int error = s->error_status_table[mb_xy];
937 if (s->mbskip_table && !s->mbskip_table[mb_xy]) // FIXME partition specific
939 if (error & (1 << error_type))
942 if (s->partitioned_frame) {
943 if (distance < threshold_part[error_type - 1])
944 s->error_status_table[mb_xy] |= 1 << error_type;
946 if (distance < threshold)
947 s->error_status_table[mb_xy] |= 1 << error_type;
950 if (error & VP_START)
955 /* forward mark errors */
957 for (i = 0; i < s->mb_num; i++) {
958 const int mb_xy = s->mb_index2xy[i];
959 int old_error = s->error_status_table[mb_xy];
961 if (old_error & VP_START) {
962 error = old_error & ER_MB_ERROR;
964 error |= old_error & ER_MB_ERROR;
965 s->error_status_table[mb_xy] |= error;
969 /* handle not partitioned case */
970 if (!s->partitioned_frame) {
971 for (i = 0; i < s->mb_num; i++) {
972 const int mb_xy = s->mb_index2xy[i];
973 error = s->error_status_table[mb_xy];
974 if (error & ER_MB_ERROR)
975 error |= ER_MB_ERROR;
976 s->error_status_table[mb_xy] = error;
980 dc_error = ac_error = mv_error = 0;
981 for (i = 0; i < s->mb_num; i++) {
982 const int mb_xy = s->mb_index2xy[i];
983 error = s->error_status_table[mb_xy];
984 if (error & ER_DC_ERROR)
986 if (error & ER_AC_ERROR)
988 if (error & ER_MV_ERROR)
991 av_log(s->avctx, AV_LOG_INFO, "concealing %d DC, %d AC, %d MV errors\n",
992 dc_error, ac_error, mv_error);
994 is_intra_likely = is_intra_more_likely(s);
996 /* set unknown mb-type to most likely */
997 for (i = 0; i < s->mb_num; i++) {
998 const int mb_xy = s->mb_index2xy[i];
999 error = s->error_status_table[mb_xy];
1000 if (!((error & ER_DC_ERROR) && (error & ER_MV_ERROR)))
1003 if (is_intra_likely)
1004 s->cur_pic.mb_type[mb_xy] = MB_TYPE_INTRA4x4;
1006 s->cur_pic.mb_type[mb_xy] = MB_TYPE_16x16 | MB_TYPE_L0;
1009 // change inter to intra blocks if no reference frames are available
1010 if (!(s->last_pic.f && s->last_pic.f->data[0]) &&
1011 !(s->next_pic.f && s->next_pic.f->data[0]))
1012 for (i = 0; i < s->mb_num; i++) {
1013 const int mb_xy = s->mb_index2xy[i];
1014 if (!IS_INTRA(s->cur_pic.mb_type[mb_xy]))
1015 s->cur_pic.mb_type[mb_xy] = MB_TYPE_INTRA4x4;
1018 /* handle inter blocks with damaged AC */
1019 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1020 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1021 const int mb_xy = mb_x + mb_y * s->mb_stride;
1022 const int mb_type = s->cur_pic.mb_type[mb_xy];
1023 const int dir = !(s->last_pic.f && s->last_pic.f->data[0]);
1024 const int mv_dir = dir ? MV_DIR_BACKWARD : MV_DIR_FORWARD;
1027 error = s->error_status_table[mb_xy];
1029 if (IS_INTRA(mb_type))
1031 if (error & ER_MV_ERROR)
1032 continue; // inter with damaged MV
1033 if (!(error & ER_AC_ERROR))
1034 continue; // undamaged inter
1036 if (IS_8X8(mb_type)) {
1037 int mb_index = mb_x * 2 + mb_y * 2 * s->b8_stride;
1039 mv_type = MV_TYPE_8X8;
1040 for (j = 0; j < 4; j++) {
1041 s->mv[0][j][0] = s->cur_pic.motion_val[dir][mb_index + (j & 1) + (j >> 1) * s->b8_stride][0];
1042 s->mv[0][j][1] = s->cur_pic.motion_val[dir][mb_index + (j & 1) + (j >> 1) * s->b8_stride][1];
1045 mv_type = MV_TYPE_16X16;
1046 s->mv[0][0][0] = s->cur_pic.motion_val[dir][mb_x * 2 + mb_y * 2 * s->b8_stride][0];
1047 s->mv[0][0][1] = s->cur_pic.motion_val[dir][mb_x * 2 + mb_y * 2 * s->b8_stride][1];
1050 s->decode_mb(s->opaque, 0 /* FIXME H.264 partitioned slices need this set */,
1051 mv_dir, mv_type, &s->mv, mb_x, mb_y, 0, 0);
1056 if (s->cur_pic.f->pict_type == AV_PICTURE_TYPE_B) {
1057 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1058 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1059 int xy = mb_x * 2 + mb_y * 2 * s->b8_stride;
1060 const int mb_xy = mb_x + mb_y * s->mb_stride;
1061 const int mb_type = s->cur_pic.mb_type[mb_xy];
1062 int mv_dir = MV_DIR_FORWARD | MV_DIR_BACKWARD;
1064 error = s->error_status_table[mb_xy];
1066 if (IS_INTRA(mb_type))
1068 if (!(error & ER_MV_ERROR))
1069 continue; // inter with undamaged MV
1070 if (!(error & ER_AC_ERROR))
1071 continue; // undamaged inter
1073 if (!(s->last_pic.f && s->last_pic.f->data[0]))
1074 mv_dir &= ~MV_DIR_FORWARD;
1075 if (!(s->next_pic.f && s->next_pic.f->data[0]))
1076 mv_dir &= ~MV_DIR_BACKWARD;
1079 int time_pp = s->pp_time;
1080 int time_pb = s->pb_time;
1082 ff_thread_await_progress(s->next_pic.tf, mb_y, 0);
1084 s->mv[0][0][0] = s->next_pic.motion_val[0][xy][0] * time_pb / time_pp;
1085 s->mv[0][0][1] = s->next_pic.motion_val[0][xy][1] * time_pb / time_pp;
1086 s->mv[1][0][0] = s->next_pic.motion_val[0][xy][0] * (time_pb - time_pp) / time_pp;
1087 s->mv[1][0][1] = s->next_pic.motion_val[0][xy][1] * (time_pb - time_pp) / time_pp;
1095 s->decode_mb(s->opaque, 0, mv_dir, MV_TYPE_16X16, &s->mv,
1103 FF_DISABLE_DEPRECATION_WARNINGS
1104 /* the filters below are not XvMC compatible, skip them */
1105 if (CONFIG_MPEG_XVMC_DECODER && s->avctx->xvmc_acceleration)
1107 FF_ENABLE_DEPRECATION_WARNINGS
1108 #endif /* FF_API_XVMC */
1109 /* fill DC for inter blocks */
1110 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1111 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1112 int dc, dcu, dcv, y, n;
1114 uint8_t *dest_y, *dest_cb, *dest_cr;
1115 const int mb_xy = mb_x + mb_y * s->mb_stride;
1116 const int mb_type = s->cur_pic.mb_type[mb_xy];
1118 error = s->error_status_table[mb_xy];
1120 if (IS_INTRA(mb_type) && s->partitioned_frame)
1122 // if (error & ER_MV_ERROR)
1123 // continue; // inter data damaged FIXME is this good?
1125 dest_y = s->cur_pic.f->data[0] + mb_x * 16 + mb_y * 16 * linesize[0];
1126 dest_cb = s->cur_pic.f->data[1] + mb_x * 8 + mb_y * 8 * linesize[1];
1127 dest_cr = s->cur_pic.f->data[2] + mb_x * 8 + mb_y * 8 * linesize[2];
1129 dc_ptr = &s->dc_val[0][mb_x * 2 + mb_y * 2 * s->b8_stride];
1130 for (n = 0; n < 4; n++) {
1132 for (y = 0; y < 8; y++) {
1134 for (x = 0; x < 8; x++)
1135 dc += dest_y[x + (n & 1) * 8 +
1136 (y + (n >> 1) * 8) * linesize[0]];
1138 dc_ptr[(n & 1) + (n >> 1) * s->b8_stride] = (dc + 4) >> 3;
1142 for (y = 0; y < 8; y++) {
1144 for (x = 0; x < 8; x++) {
1145 dcu += dest_cb[x + y * linesize[1]];
1146 dcv += dest_cr[x + y * linesize[2]];
1149 s->dc_val[1][mb_x + mb_y * s->mb_stride] = (dcu + 4) >> 3;
1150 s->dc_val[2][mb_x + mb_y * s->mb_stride] = (dcv + 4) >> 3;
1154 /* guess DC for damaged blocks */
1155 guess_dc(s, s->dc_val[0], s->mb_width * 2, s->mb_height * 2, s->b8_stride, 1);
1156 guess_dc(s, s->dc_val[1], s->mb_width, s->mb_height, s->mb_stride, 0);
1157 guess_dc(s, s->dc_val[2], s->mb_width, s->mb_height, s->mb_stride, 0);
1159 /* filter luma DC */
1160 filter181(s->dc_val[0], s->mb_width * 2, s->mb_height * 2, s->b8_stride);
1162 /* render DC only intra */
1163 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1164 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1165 uint8_t *dest_y, *dest_cb, *dest_cr;
1166 const int mb_xy = mb_x + mb_y * s->mb_stride;
1167 const int mb_type = s->cur_pic.mb_type[mb_xy];
1169 error = s->error_status_table[mb_xy];
1171 if (IS_INTER(mb_type))
1173 if (!(error & ER_AC_ERROR))
1174 continue; // undamaged
1176 dest_y = s->cur_pic.f->data[0] + mb_x * 16 + mb_y * 16 * linesize[0];
1177 dest_cb = s->cur_pic.f->data[1] + mb_x * 8 + mb_y * 8 * linesize[1];
1178 dest_cr = s->cur_pic.f->data[2] + mb_x * 8 + mb_y * 8 * linesize[2];
1180 put_dc(s, dest_y, dest_cb, dest_cr, mb_x, mb_y);
1184 if (s->avctx->error_concealment & FF_EC_DEBLOCK) {
1185 /* filter horizontal block boundaries */
1186 h_block_filter(s, s->cur_pic.f->data[0], s->mb_width * 2,
1187 s->mb_height * 2, linesize[0], 1);
1188 h_block_filter(s, s->cur_pic.f->data[1], s->mb_width,
1189 s->mb_height, linesize[1], 0);
1190 h_block_filter(s, s->cur_pic.f->data[2], s->mb_width,
1191 s->mb_height, linesize[2], 0);
1193 /* filter vertical block boundaries */
1194 v_block_filter(s, s->cur_pic.f->data[0], s->mb_width * 2,
1195 s->mb_height * 2, linesize[0], 1);
1196 v_block_filter(s, s->cur_pic.f->data[1], s->mb_width,
1197 s->mb_height, linesize[1], 0);
1198 v_block_filter(s, s->cur_pic.f->data[2], s->mb_width,
1199 s->mb_height, linesize[2], 0);
1205 /* clean a few tables */
1206 for (i = 0; i < s->mb_num; i++) {
1207 const int mb_xy = s->mb_index2xy[i];
1208 int error = s->error_status_table[mb_xy];
1210 if (s->mbskip_table && s->cur_pic.f->pict_type != AV_PICTURE_TYPE_B &&
1211 (error & (ER_DC_ERROR | ER_MV_ERROR | ER_AC_ERROR))) {
1212 s->mbskip_table[mb_xy] = 0;
1214 if (s->mbintra_table)
1215 s->mbintra_table[mb_xy] = 1;
1218 memset(&s->cur_pic, 0, sizeof(ERPicture));
1219 memset(&s->last_pic, 0, sizeof(ERPicture));
1220 memset(&s->next_pic, 0, sizeof(ERPicture));