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, ptrdiff_t *mv_step, ptrdiff_t *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, ptrdiff_t 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, ptrdiff_t 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, ptrdiff_t stride, int is_luma)
226 ptrdiff_t mvx_stride, mvy_stride;
227 const uint8_t *cm = ff_crop_tab + MAX_NEG_CROP;
228 set_mv_strides(s, &mvx_stride, &mvy_stride);
229 mvx_stride >>= is_luma;
230 mvy_stride *= mvx_stride;
232 for (b_y = 0; b_y < h; b_y++) {
233 for (b_x = 0; b_x < w - 1; b_x++) {
235 int left_status = s->error_status_table[( b_x >> is_luma) + (b_y >> is_luma) * s->mb_stride];
236 int right_status = s->error_status_table[((b_x + 1) >> is_luma) + (b_y >> is_luma) * s->mb_stride];
237 int left_intra = IS_INTRA(s->cur_pic.mb_type[( b_x >> is_luma) + (b_y >> is_luma) * s->mb_stride]);
238 int right_intra = IS_INTRA(s->cur_pic.mb_type[((b_x + 1) >> is_luma) + (b_y >> is_luma) * s->mb_stride]);
239 int left_damage = left_status & ER_MB_ERROR;
240 int right_damage = right_status & ER_MB_ERROR;
241 int offset = b_x * 8 + b_y * stride * 8;
242 int16_t *left_mv = s->cur_pic.motion_val[0][mvy_stride * b_y + mvx_stride * b_x];
243 int16_t *right_mv = s->cur_pic.motion_val[0][mvy_stride * b_y + mvx_stride * (b_x + 1)];
244 if (!(left_damage || right_damage))
245 continue; // both undamaged
246 if ((!left_intra) && (!right_intra) &&
247 FFABS(left_mv[0] - right_mv[0]) +
248 FFABS(left_mv[1] + right_mv[1]) < 2)
251 for (y = 0; y < 8; y++) {
254 a = dst[offset + 7 + y * stride] - dst[offset + 6 + y * stride];
255 b = dst[offset + 8 + y * stride] - dst[offset + 7 + y * stride];
256 c = dst[offset + 9 + y * stride] - dst[offset + 8 + y * stride];
258 d = FFABS(b) - ((FFABS(a) + FFABS(c) + 1) >> 1);
266 if (!(left_damage && right_damage))
270 dst[offset + 7 + y * stride] = cm[dst[offset + 7 + y * stride] + ((d * 7) >> 4)];
271 dst[offset + 6 + y * stride] = cm[dst[offset + 6 + y * stride] + ((d * 5) >> 4)];
272 dst[offset + 5 + y * stride] = cm[dst[offset + 5 + y * stride] + ((d * 3) >> 4)];
273 dst[offset + 4 + y * stride] = cm[dst[offset + 4 + y * stride] + ((d * 1) >> 4)];
276 dst[offset + 8 + y * stride] = cm[dst[offset + 8 + y * stride] - ((d * 7) >> 4)];
277 dst[offset + 9 + y * stride] = cm[dst[offset + 9 + y * stride] - ((d * 5) >> 4)];
278 dst[offset + 10+ y * stride] = cm[dst[offset + 10 + y * stride] - ((d * 3) >> 4)];
279 dst[offset + 11+ y * stride] = cm[dst[offset + 11 + y * stride] - ((d * 1) >> 4)];
287 * simple vertical deblocking filter used for error resilience
288 * @param w width in 8 pixel blocks
289 * @param h height in 8 pixel blocks
291 static void v_block_filter(ERContext *s, uint8_t *dst, int w, int h,
292 ptrdiff_t stride, int is_luma)
295 ptrdiff_t mvx_stride, mvy_stride;
296 const uint8_t *cm = ff_crop_tab + MAX_NEG_CROP;
297 set_mv_strides(s, &mvx_stride, &mvy_stride);
298 mvx_stride >>= is_luma;
299 mvy_stride *= mvx_stride;
301 for (b_y = 0; b_y < h - 1; b_y++) {
302 for (b_x = 0; b_x < w; b_x++) {
304 int top_status = s->error_status_table[(b_x >> is_luma) + (b_y >> is_luma) * s->mb_stride];
305 int bottom_status = s->error_status_table[(b_x >> is_luma) + ((b_y + 1) >> is_luma) * s->mb_stride];
306 int top_intra = IS_INTRA(s->cur_pic.mb_type[(b_x >> is_luma) + ( b_y >> is_luma) * s->mb_stride]);
307 int bottom_intra = IS_INTRA(s->cur_pic.mb_type[(b_x >> is_luma) + ((b_y + 1) >> is_luma) * s->mb_stride]);
308 int top_damage = top_status & ER_MB_ERROR;
309 int bottom_damage = bottom_status & ER_MB_ERROR;
310 int offset = b_x * 8 + b_y * stride * 8;
312 int16_t *top_mv = s->cur_pic.motion_val[0][mvy_stride * b_y + mvx_stride * b_x];
313 int16_t *bottom_mv = s->cur_pic.motion_val[0][mvy_stride * (b_y + 1) + mvx_stride * b_x];
315 if (!(top_damage || bottom_damage))
316 continue; // both undamaged
318 if ((!top_intra) && (!bottom_intra) &&
319 FFABS(top_mv[0] - bottom_mv[0]) +
320 FFABS(top_mv[1] + bottom_mv[1]) < 2)
323 for (x = 0; x < 8; x++) {
326 a = dst[offset + x + 7 * stride] - dst[offset + x + 6 * stride];
327 b = dst[offset + x + 8 * stride] - dst[offset + x + 7 * stride];
328 c = dst[offset + x + 9 * stride] - dst[offset + x + 8 * stride];
330 d = FFABS(b) - ((FFABS(a) + FFABS(c) + 1) >> 1);
338 if (!(top_damage && bottom_damage))
342 dst[offset + x + 7 * stride] = cm[dst[offset + x + 7 * stride] + ((d * 7) >> 4)];
343 dst[offset + x + 6 * stride] = cm[dst[offset + x + 6 * stride] + ((d * 5) >> 4)];
344 dst[offset + x + 5 * stride] = cm[dst[offset + x + 5 * stride] + ((d * 3) >> 4)];
345 dst[offset + x + 4 * stride] = cm[dst[offset + x + 4 * stride] + ((d * 1) >> 4)];
348 dst[offset + x + 8 * stride] = cm[dst[offset + x + 8 * stride] - ((d * 7) >> 4)];
349 dst[offset + x + 9 * stride] = cm[dst[offset + x + 9 * stride] - ((d * 5) >> 4)];
350 dst[offset + x + 10 * stride] = cm[dst[offset + x + 10 * stride] - ((d * 3) >> 4)];
351 dst[offset + x + 11 * stride] = cm[dst[offset + x + 11 * stride] - ((d * 1) >> 4)];
358 static void guess_mv(ERContext *s)
360 uint8_t *fixed = s->er_temp_buffer;
363 #define MV_UNCHANGED 1
364 const ptrdiff_t mb_stride = s->mb_stride;
365 const int mb_width = s->mb_width;
366 const int mb_height = s->mb_height;
367 int i, depth, num_avail;
369 ptrdiff_t mot_step, mot_stride;
371 set_mv_strides(s, &mot_step, &mot_stride);
374 for (i = 0; i < s->mb_num; i++) {
375 const int mb_xy = s->mb_index2xy[i];
377 int error = s->error_status_table[mb_xy];
379 if (IS_INTRA(s->cur_pic.mb_type[mb_xy]))
380 f = MV_FROZEN; // intra // FIXME check
381 if (!(error & ER_MV_ERROR))
382 f = MV_FROZEN; // inter with undamaged MV
389 if ((!(s->avctx->error_concealment&FF_EC_GUESS_MVS)) ||
390 num_avail <= mb_width / 2) {
391 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
392 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
393 const int mb_xy = mb_x + mb_y * s->mb_stride;
394 int mv_dir = (s->last_pic.f && s->last_pic.f->data[0]) ? MV_DIR_FORWARD : MV_DIR_BACKWARD;
396 if (IS_INTRA(s->cur_pic.mb_type[mb_xy]))
398 if (!(s->error_status_table[mb_xy] & ER_MV_ERROR))
403 s->decode_mb(s->opaque, 0, mv_dir, MV_TYPE_16X16, &s->mv,
410 for (depth = 0; ; depth++) {
411 int changed, pass, none_left;
415 for (pass = 0; (changed || pass < 2) && pass < 10; pass++) {
420 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
421 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
422 const int mb_xy = mb_x + mb_y * s->mb_stride;
423 int mv_predictor[8][2] = { { 0 } };
427 int best_score = 256 * 256 * 256 * 64;
429 const int mot_index = (mb_x + mb_y * mot_stride) * mot_step;
430 int prev_x = 0, prev_y = 0, prev_ref = 0;
432 if ((mb_x ^ mb_y ^ pass) & 1)
435 if (fixed[mb_xy] == MV_FROZEN)
439 if (mb_x > 0 && fixed[mb_xy - 1] == MV_FROZEN)
441 if (mb_x + 1 < mb_width && fixed[mb_xy + 1] == MV_FROZEN)
443 if (mb_y > 0 && fixed[mb_xy - mb_stride] == MV_FROZEN)
445 if (mb_y + 1 < mb_height && fixed[mb_xy + mb_stride] == MV_FROZEN)
451 if (mb_x > 0 && fixed[mb_xy - 1 ] == MV_CHANGED)
453 if (mb_x + 1 < mb_width && fixed[mb_xy + 1 ] == MV_CHANGED)
455 if (mb_y > 0 && fixed[mb_xy - mb_stride] == MV_CHANGED)
457 if (mb_y + 1 < mb_height && fixed[mb_xy + mb_stride] == MV_CHANGED)
459 if (j == 0 && pass > 1)
464 if (mb_x > 0 && fixed[mb_xy - 1]) {
465 mv_predictor[pred_count][0] =
466 s->cur_pic.motion_val[0][mot_index - mot_step][0];
467 mv_predictor[pred_count][1] =
468 s->cur_pic.motion_val[0][mot_index - mot_step][1];
470 s->cur_pic.ref_index[0][4 * (mb_xy - 1)];
473 if (mb_x + 1 < mb_width && fixed[mb_xy + 1]) {
474 mv_predictor[pred_count][0] =
475 s->cur_pic.motion_val[0][mot_index + mot_step][0];
476 mv_predictor[pred_count][1] =
477 s->cur_pic.motion_val[0][mot_index + mot_step][1];
479 s->cur_pic.ref_index[0][4 * (mb_xy + 1)];
482 if (mb_y > 0 && fixed[mb_xy - mb_stride]) {
483 mv_predictor[pred_count][0] =
484 s->cur_pic.motion_val[0][mot_index - mot_stride * mot_step][0];
485 mv_predictor[pred_count][1] =
486 s->cur_pic.motion_val[0][mot_index - mot_stride * mot_step][1];
488 s->cur_pic.ref_index[0][4 * (mb_xy - s->mb_stride)];
491 if (mb_y + 1<mb_height && fixed[mb_xy + mb_stride]) {
492 mv_predictor[pred_count][0] =
493 s->cur_pic.motion_val[0][mot_index + mot_stride * mot_step][0];
494 mv_predictor[pred_count][1] =
495 s->cur_pic.motion_val[0][mot_index + mot_stride * mot_step][1];
497 s->cur_pic.ref_index[0][4 * (mb_xy + s->mb_stride)];
503 if (pred_count > 1) {
504 int sum_x = 0, sum_y = 0, sum_r = 0;
505 int max_x, max_y, min_x, min_y, max_r, min_r;
507 for (j = 0; j < pred_count; j++) {
508 sum_x += mv_predictor[j][0];
509 sum_y += mv_predictor[j][1];
511 if (j && ref[j] != ref[j - 1])
512 goto skip_mean_and_median;
516 mv_predictor[pred_count][0] = sum_x / j;
517 mv_predictor[pred_count][1] = sum_y / j;
518 ref[pred_count] = sum_r / j;
521 if (pred_count >= 3) {
522 min_y = min_x = min_r = 99999;
523 max_y = max_x = max_r = -99999;
525 min_x = min_y = max_x = max_y = min_r = max_r = 0;
527 for (j = 0; j < pred_count; j++) {
528 max_x = FFMAX(max_x, mv_predictor[j][0]);
529 max_y = FFMAX(max_y, mv_predictor[j][1]);
530 max_r = FFMAX(max_r, ref[j]);
531 min_x = FFMIN(min_x, mv_predictor[j][0]);
532 min_y = FFMIN(min_y, mv_predictor[j][1]);
533 min_r = FFMIN(min_r, ref[j]);
535 mv_predictor[pred_count + 1][0] = sum_x - max_x - min_x;
536 mv_predictor[pred_count + 1][1] = sum_y - max_y - min_y;
537 ref[pred_count + 1] = sum_r - max_r - min_r;
539 if (pred_count == 4) {
540 mv_predictor[pred_count + 1][0] /= 2;
541 mv_predictor[pred_count + 1][1] /= 2;
542 ref[pred_count + 1] /= 2;
547 skip_mean_and_median:
552 if (s->avctx->codec_id == AV_CODEC_ID_H264) {
555 ff_thread_await_progress(s->last_pic.tf,
558 if (!s->last_pic.motion_val[0] ||
559 !s->last_pic.ref_index[0])
561 prev_x = s->last_pic.motion_val[0][mot_index][0];
562 prev_y = s->last_pic.motion_val[0][mot_index][1];
563 prev_ref = s->last_pic.ref_index[0][4 * mb_xy];
565 prev_x = s->cur_pic.motion_val[0][mot_index][0];
566 prev_y = s->cur_pic.motion_val[0][mot_index][1];
567 prev_ref = s->cur_pic.ref_index[0][4 * mb_xy];
571 mv_predictor[pred_count][0] = prev_x;
572 mv_predictor[pred_count][1] = prev_y;
573 ref[pred_count] = prev_ref;
578 for (j = 0; j < pred_count; j++) {
579 int *linesize = s->cur_pic.f->linesize;
581 uint8_t *src = s->cur_pic.f->data[0] +
582 mb_x * 16 + mb_y * 16 * linesize[0];
584 s->cur_pic.motion_val[0][mot_index][0] =
585 s->mv[0][0][0] = mv_predictor[j][0];
586 s->cur_pic.motion_val[0][mot_index][1] =
587 s->mv[0][0][1] = mv_predictor[j][1];
589 // predictor intra or otherwise not available
593 s->decode_mb(s->opaque, ref[j], MV_DIR_FORWARD,
594 MV_TYPE_16X16, &s->mv, mb_x, mb_y, 0, 0);
596 if (mb_x > 0 && fixed[mb_xy - 1]) {
598 for (k = 0; k < 16; k++)
599 score += FFABS(src[k * linesize[0] - 1] -
600 src[k * linesize[0]]);
602 if (mb_x + 1 < mb_width && fixed[mb_xy + 1]) {
604 for (k = 0; k < 16; k++)
605 score += FFABS(src[k * linesize[0] + 15] -
606 src[k * linesize[0] + 16]);
608 if (mb_y > 0 && fixed[mb_xy - mb_stride]) {
610 for (k = 0; k < 16; k++)
611 score += FFABS(src[k - linesize[0]] - src[k]);
613 if (mb_y + 1 < mb_height && fixed[mb_xy + mb_stride]) {
615 for (k = 0; k < 16; k++)
616 score += FFABS(src[k + linesize[0] * 15] -
617 src[k + linesize[0] * 16]);
620 if (score <= best_score) { // <= will favor the last MV
625 score_sum += best_score;
626 s->mv[0][0][0] = mv_predictor[best_pred][0];
627 s->mv[0][0][1] = mv_predictor[best_pred][1];
629 for (i = 0; i < mot_step; i++)
630 for (j = 0; j < mot_step; j++) {
631 s->cur_pic.motion_val[0][mot_index + i + j * mot_stride][0] = s->mv[0][0][0];
632 s->cur_pic.motion_val[0][mot_index + i + j * mot_stride][1] = s->mv[0][0][1];
635 s->decode_mb(s->opaque, ref[best_pred], MV_DIR_FORWARD,
636 MV_TYPE_16X16, &s->mv, mb_x, mb_y, 0, 0);
639 if (s->mv[0][0][0] != prev_x || s->mv[0][0][1] != prev_y) {
640 fixed[mb_xy] = MV_CHANGED;
643 fixed[mb_xy] = MV_UNCHANGED;
651 for (i = 0; i < s->mb_num; i++) {
652 int mb_xy = s->mb_index2xy[i];
654 fixed[mb_xy] = MV_FROZEN;
659 static int is_intra_more_likely(ERContext *s)
661 int is_intra_likely, i, j, undamaged_count, skip_amount, mb_x, mb_y;
663 if (!s->last_pic.f || !s->last_pic.f->data[0])
664 return 1; // no previous frame available -> use spatial prediction
667 for (i = 0; i < s->mb_num; i++) {
668 const int mb_xy = s->mb_index2xy[i];
669 const int error = s->error_status_table[mb_xy];
670 if (!((error & ER_DC_ERROR) && (error & ER_MV_ERROR)))
674 if (s->avctx->codec_id == AV_CODEC_ID_H264 && s->ref_count <= 0)
677 if (undamaged_count < 5)
678 return 0; // almost all MBs damaged -> use temporal prediction
681 FF_DISABLE_DEPRECATION_WARNINGS
682 // prevent dsp.sad() check, that requires access to the image
683 if (CONFIG_MPEG_XVMC_DECODER &&
684 s->avctx->xvmc_acceleration &&
685 s->cur_pic.f->pict_type == AV_PICTURE_TYPE_I)
687 FF_ENABLE_DEPRECATION_WARNINGS
688 #endif /* FF_API_XVMC */
690 skip_amount = FFMAX(undamaged_count / 50, 1); // check only up to 50 MBs
694 for (mb_y = 0; mb_y < s->mb_height - 1; mb_y++) {
695 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
697 const int mb_xy = mb_x + mb_y * s->mb_stride;
699 error = s->error_status_table[mb_xy];
700 if ((error & ER_DC_ERROR) && (error & ER_MV_ERROR))
701 continue; // skip damaged
704 // skip a few to speed things up
705 if ((j % skip_amount) != 0)
708 if (s->cur_pic.f->pict_type == AV_PICTURE_TYPE_I) {
709 int *linesize = s->cur_pic.f->linesize;
710 uint8_t *mb_ptr = s->cur_pic.f->data[0] +
711 mb_x * 16 + mb_y * 16 * linesize[0];
712 uint8_t *last_mb_ptr = s->last_pic.f->data[0] +
713 mb_x * 16 + mb_y * 16 * linesize[0];
715 if (s->avctx->codec_id == AV_CODEC_ID_H264) {
718 ff_thread_await_progress(s->last_pic.tf, mb_y, 0);
720 is_intra_likely += s->mecc.sad[0](NULL, last_mb_ptr, mb_ptr,
722 is_intra_likely -= s->mecc.sad[0](NULL, last_mb_ptr,
723 last_mb_ptr + linesize[0] * 16,
726 if (IS_INTRA(s->cur_pic.mb_type[mb_xy]))
733 return is_intra_likely > 0;
736 void ff_er_frame_start(ERContext *s)
738 if (!s->avctx->error_concealment)
741 if (!s->mecc_inited) {
742 ff_me_cmp_init(&s->mecc, s->avctx);
746 memset(s->error_status_table, ER_MB_ERROR | VP_START | ER_MB_END,
747 s->mb_stride * s->mb_height * sizeof(uint8_t));
748 s->error_count = 3 * s->mb_num;
749 s->error_occurred = 0;
754 * @param endx x component of the last macroblock, can be -1
755 * for the last of the previous line
756 * @param status the status at the end (ER_MV_END, ER_AC_ERROR, ...), it is
757 * assumed that no earlier end or error of the same type occurred
759 void ff_er_add_slice(ERContext *s, int startx, int starty,
760 int endx, int endy, int status)
762 const int start_i = av_clip(startx + starty * s->mb_width, 0, s->mb_num - 1);
763 const int end_i = av_clip(endx + endy * s->mb_width, 0, s->mb_num);
764 const int start_xy = s->mb_index2xy[start_i];
765 const int end_xy = s->mb_index2xy[end_i];
768 if (s->avctx->hwaccel)
771 if (start_i > end_i || start_xy > end_xy) {
772 av_log(s->avctx, AV_LOG_ERROR,
773 "internal error, slice end before start\n");
777 if (!s->avctx->error_concealment)
781 if (status & (ER_AC_ERROR | ER_AC_END)) {
782 mask &= ~(ER_AC_ERROR | ER_AC_END);
783 s->error_count -= end_i - start_i + 1;
785 if (status & (ER_DC_ERROR | ER_DC_END)) {
786 mask &= ~(ER_DC_ERROR | ER_DC_END);
787 s->error_count -= end_i - start_i + 1;
789 if (status & (ER_MV_ERROR | ER_MV_END)) {
790 mask &= ~(ER_MV_ERROR | ER_MV_END);
791 s->error_count -= end_i - start_i + 1;
794 if (status & ER_MB_ERROR) {
795 s->error_occurred = 1;
796 s->error_count = INT_MAX;
800 memset(&s->error_status_table[start_xy], 0,
801 (end_xy - start_xy) * sizeof(uint8_t));
804 for (i = start_xy; i < end_xy; i++)
805 s->error_status_table[i] &= mask;
808 if (end_i == s->mb_num)
809 s->error_count = INT_MAX;
811 s->error_status_table[end_xy] &= mask;
812 s->error_status_table[end_xy] |= status;
815 s->error_status_table[start_xy] |= VP_START;
817 if (start_xy > 0 && s->avctx->thread_count <= 1 &&
818 s->avctx->skip_top * s->mb_width < start_i) {
819 int prev_status = s->error_status_table[s->mb_index2xy[start_i - 1]];
821 prev_status &= ~ VP_START;
822 if (prev_status != (ER_MV_END | ER_DC_END | ER_AC_END))
823 s->error_count = INT_MAX;
827 void ff_er_frame_end(ERContext *s)
829 int *linesize = s->cur_pic.f->linesize;
830 int i, mb_x, mb_y, error, error_type, dc_error, mv_error, ac_error;
832 int threshold_part[4] = { 100, 100, 100 };
836 /* We do not support ER of field pictures yet,
837 * though it should not crash if enabled. */
838 if (!s->avctx->error_concealment || s->error_count == 0 ||
841 s->cur_pic.field_picture ||
842 s->error_count == 3 * s->mb_width *
843 (s->avctx->skip_top + s->avctx->skip_bottom)) {
847 if (!s->cur_pic.motion_val[0] || !s->cur_pic.ref_index[0]) {
848 av_log(s->avctx, AV_LOG_ERROR, "MVs not available, ER not possible.\n");
852 if (s->avctx->debug & FF_DEBUG_ER) {
853 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
854 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
855 int status = s->error_status_table[mb_x + mb_y * s->mb_stride];
857 av_log(s->avctx, AV_LOG_DEBUG, "%2X ", status);
859 av_log(s->avctx, AV_LOG_DEBUG, "\n");
863 /* handle overlapping slices */
864 for (error_type = 1; error_type <= 3; error_type++) {
867 for (i = s->mb_num - 1; i >= 0; i--) {
868 const int mb_xy = s->mb_index2xy[i];
869 int error = s->error_status_table[mb_xy];
871 if (error & (1 << error_type))
873 if (error & (8 << error_type))
877 s->error_status_table[mb_xy] |= 1 << error_type;
879 if (error & VP_START)
884 /* handle slices with partitions of different length */
885 if (s->partitioned_frame) {
888 for (i = s->mb_num - 1; i >= 0; i--) {
889 const int mb_xy = s->mb_index2xy[i];
890 int error = s->error_status_table[mb_xy];
892 if (error & ER_AC_END)
894 if ((error & ER_MV_END) ||
895 (error & ER_DC_END) ||
896 (error & ER_AC_ERROR))
900 s->error_status_table[mb_xy]|= ER_AC_ERROR;
902 if (error & VP_START)
907 /* handle missing slices */
908 if (s->avctx->err_recognition & AV_EF_EXPLODE) {
912 for (i = s->mb_num - 2; i >= s->mb_width + 100; i--) {
913 const int mb_xy = s->mb_index2xy[i];
914 int error1 = s->error_status_table[mb_xy];
915 int error2 = s->error_status_table[s->mb_index2xy[i + 1]];
917 if (error1 & VP_START)
920 if (error2 == (VP_START | ER_MB_ERROR | ER_MB_END) &&
921 error1 != (VP_START | ER_MB_ERROR | ER_MB_END) &&
922 ((error1 & ER_AC_END) || (error1 & ER_DC_END) ||
923 (error1 & ER_MV_END))) {
929 s->error_status_table[mb_xy] |= ER_MB_ERROR;
933 /* backward mark errors */
935 for (error_type = 1; error_type <= 3; error_type++) {
936 for (i = s->mb_num - 1; i >= 0; i--) {
937 const int mb_xy = s->mb_index2xy[i];
938 int error = s->error_status_table[mb_xy];
940 if (s->mbskip_table && !s->mbskip_table[mb_xy]) // FIXME partition specific
942 if (error & (1 << error_type))
945 if (s->partitioned_frame) {
946 if (distance < threshold_part[error_type - 1])
947 s->error_status_table[mb_xy] |= 1 << error_type;
949 if (distance < threshold)
950 s->error_status_table[mb_xy] |= 1 << error_type;
953 if (error & VP_START)
958 /* forward mark errors */
960 for (i = 0; i < s->mb_num; i++) {
961 const int mb_xy = s->mb_index2xy[i];
962 int old_error = s->error_status_table[mb_xy];
964 if (old_error & VP_START) {
965 error = old_error & ER_MB_ERROR;
967 error |= old_error & ER_MB_ERROR;
968 s->error_status_table[mb_xy] |= error;
972 /* handle not partitioned case */
973 if (!s->partitioned_frame) {
974 for (i = 0; i < s->mb_num; i++) {
975 const int mb_xy = s->mb_index2xy[i];
976 error = s->error_status_table[mb_xy];
977 if (error & ER_MB_ERROR)
978 error |= ER_MB_ERROR;
979 s->error_status_table[mb_xy] = error;
983 dc_error = ac_error = mv_error = 0;
984 for (i = 0; i < s->mb_num; i++) {
985 const int mb_xy = s->mb_index2xy[i];
986 error = s->error_status_table[mb_xy];
987 if (error & ER_DC_ERROR)
989 if (error & ER_AC_ERROR)
991 if (error & ER_MV_ERROR)
994 av_log(s->avctx, AV_LOG_INFO, "concealing %d DC, %d AC, %d MV errors\n",
995 dc_error, ac_error, mv_error);
997 is_intra_likely = is_intra_more_likely(s);
999 /* set unknown mb-type to most likely */
1000 for (i = 0; i < s->mb_num; i++) {
1001 const int mb_xy = s->mb_index2xy[i];
1002 error = s->error_status_table[mb_xy];
1003 if (!((error & ER_DC_ERROR) && (error & ER_MV_ERROR)))
1006 if (is_intra_likely)
1007 s->cur_pic.mb_type[mb_xy] = MB_TYPE_INTRA4x4;
1009 s->cur_pic.mb_type[mb_xy] = MB_TYPE_16x16 | MB_TYPE_L0;
1012 // change inter to intra blocks if no reference frames are available
1013 if (!(s->last_pic.f && s->last_pic.f->data[0]) &&
1014 !(s->next_pic.f && s->next_pic.f->data[0]))
1015 for (i = 0; i < s->mb_num; i++) {
1016 const int mb_xy = s->mb_index2xy[i];
1017 if (!IS_INTRA(s->cur_pic.mb_type[mb_xy]))
1018 s->cur_pic.mb_type[mb_xy] = MB_TYPE_INTRA4x4;
1021 /* handle inter blocks with damaged AC */
1022 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1023 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1024 const int mb_xy = mb_x + mb_y * s->mb_stride;
1025 const int mb_type = s->cur_pic.mb_type[mb_xy];
1026 const int dir = !(s->last_pic.f && s->last_pic.f->data[0]);
1027 const int mv_dir = dir ? MV_DIR_BACKWARD : MV_DIR_FORWARD;
1030 error = s->error_status_table[mb_xy];
1032 if (IS_INTRA(mb_type))
1034 if (error & ER_MV_ERROR)
1035 continue; // inter with damaged MV
1036 if (!(error & ER_AC_ERROR))
1037 continue; // undamaged inter
1039 if (IS_8X8(mb_type)) {
1040 int mb_index = mb_x * 2 + mb_y * 2 * s->b8_stride;
1042 mv_type = MV_TYPE_8X8;
1043 for (j = 0; j < 4; j++) {
1044 s->mv[0][j][0] = s->cur_pic.motion_val[dir][mb_index + (j & 1) + (j >> 1) * s->b8_stride][0];
1045 s->mv[0][j][1] = s->cur_pic.motion_val[dir][mb_index + (j & 1) + (j >> 1) * s->b8_stride][1];
1048 mv_type = MV_TYPE_16X16;
1049 s->mv[0][0][0] = s->cur_pic.motion_val[dir][mb_x * 2 + mb_y * 2 * s->b8_stride][0];
1050 s->mv[0][0][1] = s->cur_pic.motion_val[dir][mb_x * 2 + mb_y * 2 * s->b8_stride][1];
1053 s->decode_mb(s->opaque, 0 /* FIXME H.264 partitioned slices need this set */,
1054 mv_dir, mv_type, &s->mv, mb_x, mb_y, 0, 0);
1059 if (s->cur_pic.f->pict_type == AV_PICTURE_TYPE_B) {
1060 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1061 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1062 int xy = mb_x * 2 + mb_y * 2 * s->b8_stride;
1063 const int mb_xy = mb_x + mb_y * s->mb_stride;
1064 const int mb_type = s->cur_pic.mb_type[mb_xy];
1065 int mv_dir = MV_DIR_FORWARD | MV_DIR_BACKWARD;
1067 error = s->error_status_table[mb_xy];
1069 if (IS_INTRA(mb_type))
1071 if (!(error & ER_MV_ERROR))
1072 continue; // inter with undamaged MV
1073 if (!(error & ER_AC_ERROR))
1074 continue; // undamaged inter
1076 if (!(s->last_pic.f && s->last_pic.f->data[0]))
1077 mv_dir &= ~MV_DIR_FORWARD;
1078 if (!(s->next_pic.f && s->next_pic.f->data[0]))
1079 mv_dir &= ~MV_DIR_BACKWARD;
1082 int time_pp = s->pp_time;
1083 int time_pb = s->pb_time;
1085 ff_thread_await_progress(s->next_pic.tf, mb_y, 0);
1087 s->mv[0][0][0] = s->next_pic.motion_val[0][xy][0] * time_pb / time_pp;
1088 s->mv[0][0][1] = s->next_pic.motion_val[0][xy][1] * time_pb / time_pp;
1089 s->mv[1][0][0] = s->next_pic.motion_val[0][xy][0] * (time_pb - time_pp) / time_pp;
1090 s->mv[1][0][1] = s->next_pic.motion_val[0][xy][1] * (time_pb - time_pp) / time_pp;
1098 s->decode_mb(s->opaque, 0, mv_dir, MV_TYPE_16X16, &s->mv,
1106 FF_DISABLE_DEPRECATION_WARNINGS
1107 /* the filters below are not XvMC compatible, skip them */
1108 if (CONFIG_MPEG_XVMC_DECODER && s->avctx->xvmc_acceleration)
1110 FF_ENABLE_DEPRECATION_WARNINGS
1111 #endif /* FF_API_XVMC */
1112 /* fill DC for inter blocks */
1113 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1114 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1115 int dc, dcu, dcv, y, n;
1117 uint8_t *dest_y, *dest_cb, *dest_cr;
1118 const int mb_xy = mb_x + mb_y * s->mb_stride;
1119 const int mb_type = s->cur_pic.mb_type[mb_xy];
1121 error = s->error_status_table[mb_xy];
1123 if (IS_INTRA(mb_type) && s->partitioned_frame)
1125 // if (error & ER_MV_ERROR)
1126 // continue; // inter data damaged FIXME is this good?
1128 dest_y = s->cur_pic.f->data[0] + mb_x * 16 + mb_y * 16 * linesize[0];
1129 dest_cb = s->cur_pic.f->data[1] + mb_x * 8 + mb_y * 8 * linesize[1];
1130 dest_cr = s->cur_pic.f->data[2] + mb_x * 8 + mb_y * 8 * linesize[2];
1132 dc_ptr = &s->dc_val[0][mb_x * 2 + mb_y * 2 * s->b8_stride];
1133 for (n = 0; n < 4; n++) {
1135 for (y = 0; y < 8; y++) {
1137 for (x = 0; x < 8; x++)
1138 dc += dest_y[x + (n & 1) * 8 +
1139 (y + (n >> 1) * 8) * linesize[0]];
1141 dc_ptr[(n & 1) + (n >> 1) * s->b8_stride] = (dc + 4) >> 3;
1145 for (y = 0; y < 8; y++) {
1147 for (x = 0; x < 8; x++) {
1148 dcu += dest_cb[x + y * linesize[1]];
1149 dcv += dest_cr[x + y * linesize[2]];
1152 s->dc_val[1][mb_x + mb_y * s->mb_stride] = (dcu + 4) >> 3;
1153 s->dc_val[2][mb_x + mb_y * s->mb_stride] = (dcv + 4) >> 3;
1157 /* guess DC for damaged blocks */
1158 guess_dc(s, s->dc_val[0], s->mb_width * 2, s->mb_height * 2, s->b8_stride, 1);
1159 guess_dc(s, s->dc_val[1], s->mb_width, s->mb_height, s->mb_stride, 0);
1160 guess_dc(s, s->dc_val[2], s->mb_width, s->mb_height, s->mb_stride, 0);
1162 /* filter luma DC */
1163 filter181(s->dc_val[0], s->mb_width * 2, s->mb_height * 2, s->b8_stride);
1165 /* render DC only intra */
1166 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1167 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1168 uint8_t *dest_y, *dest_cb, *dest_cr;
1169 const int mb_xy = mb_x + mb_y * s->mb_stride;
1170 const int mb_type = s->cur_pic.mb_type[mb_xy];
1172 error = s->error_status_table[mb_xy];
1174 if (IS_INTER(mb_type))
1176 if (!(error & ER_AC_ERROR))
1177 continue; // undamaged
1179 dest_y = s->cur_pic.f->data[0] + mb_x * 16 + mb_y * 16 * linesize[0];
1180 dest_cb = s->cur_pic.f->data[1] + mb_x * 8 + mb_y * 8 * linesize[1];
1181 dest_cr = s->cur_pic.f->data[2] + mb_x * 8 + mb_y * 8 * linesize[2];
1183 put_dc(s, dest_y, dest_cb, dest_cr, mb_x, mb_y);
1187 if (s->avctx->error_concealment & FF_EC_DEBLOCK) {
1188 /* filter horizontal block boundaries */
1189 h_block_filter(s, s->cur_pic.f->data[0], s->mb_width * 2,
1190 s->mb_height * 2, linesize[0], 1);
1191 h_block_filter(s, s->cur_pic.f->data[1], s->mb_width,
1192 s->mb_height, linesize[1], 0);
1193 h_block_filter(s, s->cur_pic.f->data[2], s->mb_width,
1194 s->mb_height, linesize[2], 0);
1196 /* filter vertical block boundaries */
1197 v_block_filter(s, s->cur_pic.f->data[0], s->mb_width * 2,
1198 s->mb_height * 2, linesize[0], 1);
1199 v_block_filter(s, s->cur_pic.f->data[1], s->mb_width,
1200 s->mb_height, linesize[1], 0);
1201 v_block_filter(s, s->cur_pic.f->data[2], s->mb_width,
1202 s->mb_height, linesize[2], 0);
1208 /* clean a few tables */
1209 for (i = 0; i < s->mb_num; i++) {
1210 const int mb_xy = s->mb_index2xy[i];
1211 int error = s->error_status_table[mb_xy];
1213 if (s->mbskip_table && s->cur_pic.f->pict_type != AV_PICTURE_TYPE_B &&
1214 (error & (ER_DC_ERROR | ER_MV_ERROR | ER_AC_ERROR))) {
1215 s->mbskip_table[mb_xy] = 0;
1217 if (s->mbintra_table)
1218 s->mbintra_table[mb_xy] = 1;
1221 memset(&s->cur_pic, 0, sizeof(ERPicture));
1222 memset(&s->last_pic, 0, sizeof(ERPicture));
1223 memset(&s->next_pic, 0, sizeof(ERPicture));