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/atomic.h"
31 #include "libavutil/internal.h"
33 #include "error_resilience.h"
35 #include "mpegutils.h"
36 #include "mpegvideo.h"
37 #include "rectangle.h"
42 * @param stride the number of MVs to get to the next row
43 * @param mv_step the number of MVs per row or column in a macroblock
45 static void set_mv_strides(ERContext *s, int *mv_step, int *stride)
47 if (s->avctx->codec_id == AV_CODEC_ID_H264) {
48 av_assert0(s->quarter_sample);
50 *stride = s->mb_width * 4;
53 *stride = s->b8_stride;
58 * Replace the current MB with a flat dc-only version.
60 static void put_dc(ERContext *s, uint8_t *dest_y, uint8_t *dest_cb,
61 uint8_t *dest_cr, int mb_x, int mb_y)
63 int *linesize = s->cur_pic.f->linesize;
64 int dc, dcu, dcv, y, i;
65 for (i = 0; i < 4; i++) {
66 dc = s->dc_val[0][mb_x * 2 + (i & 1) + (mb_y * 2 + (i >> 1)) * s->b8_stride];
71 for (y = 0; y < 8; y++) {
73 for (x = 0; x < 8; x++)
74 dest_y[x + (i & 1) * 8 + (y + (i >> 1) * 8) * linesize[0]] = dc / 8;
77 dcu = s->dc_val[1][mb_x + mb_y * s->mb_stride];
78 dcv = s->dc_val[2][mb_x + mb_y * s->mb_stride];
89 for (y = 0; y < 8; y++) {
91 for (x = 0; x < 8; x++) {
92 dest_cb[x + y * linesize[1]] = dcu / 8;
93 dest_cr[x + y * linesize[2]] = dcv / 8;
98 static void filter181(int16_t *data, int width, int height, int stride)
102 /* horizontal filter */
103 for (y = 1; y < height - 1; y++) {
104 int prev_dc = data[0 + y * stride];
106 for (x = 1; x < width - 1; x++) {
109 data[x + y * stride] * 8 -
110 data[x + 1 + y * stride];
111 dc = (dc * 10923 + 32768) >> 16;
112 prev_dc = data[x + y * stride];
113 data[x + y * stride] = dc;
117 /* vertical filter */
118 for (x = 1; x < width - 1; x++) {
119 int prev_dc = data[x];
121 for (y = 1; y < height - 1; y++) {
125 data[x + y * stride] * 8 -
126 data[x + (y + 1) * stride];
127 dc = (dc * 10923 + 32768) >> 16;
128 prev_dc = data[x + y * stride];
129 data[x + y * stride] = dc;
135 * guess the dc of blocks which do not have an undamaged dc
136 * @param w width in 8 pixel blocks
137 * @param h height in 8 pixel blocks
139 static void guess_dc(ERContext *s, int16_t *dc, int w,
140 int h, int stride, int is_luma)
143 int16_t (*col )[4] = av_malloc_array(stride, h*sizeof( int16_t)*4);
144 uint32_t (*dist)[4] = av_malloc_array(stride, h*sizeof(uint32_t)*4);
147 av_log(s->avctx, AV_LOG_ERROR, "guess_dc() is out of memory\n");
151 for(b_y=0; b_y<h; b_y++){
154 for(b_x=0; b_x<w; b_x++){
155 int mb_index_j= (b_x>>is_luma) + (b_y>>is_luma)*s->mb_stride;
156 int error_j= s->error_status_table[mb_index_j];
157 int intra_j = IS_INTRA(s->cur_pic.mb_type[mb_index_j]);
158 if(intra_j==0 || !(error_j&ER_DC_ERROR)){
159 color= dc[b_x + b_y*stride];
162 col [b_x + b_y*stride][1]= color;
163 dist[b_x + b_y*stride][1]= distance >= 0 ? b_x-distance : 9999;
167 for(b_x=w-1; b_x>=0; b_x--){
168 int mb_index_j= (b_x>>is_luma) + (b_y>>is_luma)*s->mb_stride;
169 int error_j= s->error_status_table[mb_index_j];
170 int intra_j = IS_INTRA(s->cur_pic.mb_type[mb_index_j]);
171 if(intra_j==0 || !(error_j&ER_DC_ERROR)){
172 color= dc[b_x + b_y*stride];
175 col [b_x + b_y*stride][0]= color;
176 dist[b_x + b_y*stride][0]= distance >= 0 ? distance-b_x : 9999;
179 for(b_x=0; b_x<w; b_x++){
182 for(b_y=0; b_y<h; b_y++){
183 int mb_index_j= (b_x>>is_luma) + (b_y>>is_luma)*s->mb_stride;
184 int error_j= s->error_status_table[mb_index_j];
185 int intra_j = IS_INTRA(s->cur_pic.mb_type[mb_index_j]);
186 if(intra_j==0 || !(error_j&ER_DC_ERROR)){
187 color= dc[b_x + b_y*stride];
190 col [b_x + b_y*stride][3]= color;
191 dist[b_x + b_y*stride][3]= distance >= 0 ? b_y-distance : 9999;
195 for(b_y=h-1; b_y>=0; b_y--){
196 int mb_index_j= (b_x>>is_luma) + (b_y>>is_luma)*s->mb_stride;
197 int error_j= s->error_status_table[mb_index_j];
198 int intra_j = IS_INTRA(s->cur_pic.mb_type[mb_index_j]);
199 if(intra_j==0 || !(error_j&ER_DC_ERROR)){
200 color= dc[b_x + b_y*stride];
203 col [b_x + b_y*stride][2]= color;
204 dist[b_x + b_y*stride][2]= distance >= 0 ? distance-b_y : 9999;
208 for (b_y = 0; b_y < h; b_y++) {
209 for (b_x = 0; b_x < w; b_x++) {
210 int mb_index, error, j;
211 int64_t guess, weight_sum;
212 mb_index = (b_x >> is_luma) + (b_y >> is_luma) * s->mb_stride;
213 error = s->error_status_table[mb_index];
215 if (IS_INTER(s->cur_pic.mb_type[mb_index]))
217 if (!(error & ER_DC_ERROR))
222 for (j = 0; j < 4; j++) {
223 int64_t weight = 256 * 256 * 256 * 16 / FFMAX(dist[b_x + b_y*stride][j], 1);
224 guess += weight*(int64_t)col[b_x + b_y*stride][j];
225 weight_sum += weight;
227 guess = (guess + weight_sum / 2) / weight_sum;
228 dc[b_x + b_y * stride] = guess;
238 * simple horizontal deblocking filter used for error resilience
239 * @param w width in 8 pixel blocks
240 * @param h height in 8 pixel blocks
242 static void h_block_filter(ERContext *s, uint8_t *dst, int w,
243 int h, int stride, int is_luma)
245 int b_x, b_y, mvx_stride, mvy_stride;
246 const uint8_t *cm = ff_crop_tab + MAX_NEG_CROP;
247 set_mv_strides(s, &mvx_stride, &mvy_stride);
248 mvx_stride >>= is_luma;
249 mvy_stride *= mvx_stride;
251 for (b_y = 0; b_y < h; b_y++) {
252 for (b_x = 0; b_x < w - 1; b_x++) {
254 int left_status = s->error_status_table[( b_x >> is_luma) + (b_y >> is_luma) * s->mb_stride];
255 int right_status = s->error_status_table[((b_x + 1) >> is_luma) + (b_y >> is_luma) * s->mb_stride];
256 int left_intra = IS_INTRA(s->cur_pic.mb_type[( b_x >> is_luma) + (b_y >> is_luma) * s->mb_stride]);
257 int right_intra = IS_INTRA(s->cur_pic.mb_type[((b_x + 1) >> is_luma) + (b_y >> is_luma) * s->mb_stride]);
258 int left_damage = left_status & ER_MB_ERROR;
259 int right_damage = right_status & ER_MB_ERROR;
260 int offset = b_x * 8 + b_y * stride * 8;
261 int16_t *left_mv = s->cur_pic.motion_val[0][mvy_stride * b_y + mvx_stride * b_x];
262 int16_t *right_mv = s->cur_pic.motion_val[0][mvy_stride * b_y + mvx_stride * (b_x + 1)];
263 if (!(left_damage || right_damage))
264 continue; // both undamaged
265 if ((!left_intra) && (!right_intra) &&
266 FFABS(left_mv[0] - right_mv[0]) +
267 FFABS(left_mv[1] + right_mv[1]) < 2)
270 for (y = 0; y < 8; y++) {
273 a = dst[offset + 7 + y * stride] - dst[offset + 6 + y * stride];
274 b = dst[offset + 8 + y * stride] - dst[offset + 7 + y * stride];
275 c = dst[offset + 9 + y * stride] - dst[offset + 8 + y * stride];
277 d = FFABS(b) - ((FFABS(a) + FFABS(c) + 1) >> 1);
285 if (!(left_damage && right_damage))
289 dst[offset + 7 + y * stride] = cm[dst[offset + 7 + y * stride] + ((d * 7) >> 4)];
290 dst[offset + 6 + y * stride] = cm[dst[offset + 6 + y * stride] + ((d * 5) >> 4)];
291 dst[offset + 5 + y * stride] = cm[dst[offset + 5 + y * stride] + ((d * 3) >> 4)];
292 dst[offset + 4 + y * stride] = cm[dst[offset + 4 + y * stride] + ((d * 1) >> 4)];
295 dst[offset + 8 + y * stride] = cm[dst[offset + 8 + y * stride] - ((d * 7) >> 4)];
296 dst[offset + 9 + y * stride] = cm[dst[offset + 9 + y * stride] - ((d * 5) >> 4)];
297 dst[offset + 10+ y * stride] = cm[dst[offset + 10 + y * stride] - ((d * 3) >> 4)];
298 dst[offset + 11+ y * stride] = cm[dst[offset + 11 + y * stride] - ((d * 1) >> 4)];
306 * simple vertical deblocking filter used for error resilience
307 * @param w width in 8 pixel blocks
308 * @param h height in 8 pixel blocks
310 static void v_block_filter(ERContext *s, uint8_t *dst, int w, int h,
311 int stride, int is_luma)
313 int b_x, b_y, mvx_stride, mvy_stride;
314 const uint8_t *cm = ff_crop_tab + MAX_NEG_CROP;
315 set_mv_strides(s, &mvx_stride, &mvy_stride);
316 mvx_stride >>= is_luma;
317 mvy_stride *= mvx_stride;
319 for (b_y = 0; b_y < h - 1; b_y++) {
320 for (b_x = 0; b_x < w; b_x++) {
322 int top_status = s->error_status_table[(b_x >> is_luma) + (b_y >> is_luma) * s->mb_stride];
323 int bottom_status = s->error_status_table[(b_x >> is_luma) + ((b_y + 1) >> is_luma) * s->mb_stride];
324 int top_intra = IS_INTRA(s->cur_pic.mb_type[(b_x >> is_luma) + ( b_y >> is_luma) * s->mb_stride]);
325 int bottom_intra = IS_INTRA(s->cur_pic.mb_type[(b_x >> is_luma) + ((b_y + 1) >> is_luma) * s->mb_stride]);
326 int top_damage = top_status & ER_MB_ERROR;
327 int bottom_damage = bottom_status & ER_MB_ERROR;
328 int offset = b_x * 8 + b_y * stride * 8;
330 int16_t *top_mv = s->cur_pic.motion_val[0][mvy_stride * b_y + mvx_stride * b_x];
331 int16_t *bottom_mv = s->cur_pic.motion_val[0][mvy_stride * (b_y + 1) + mvx_stride * b_x];
333 if (!(top_damage || bottom_damage))
334 continue; // both undamaged
336 if ((!top_intra) && (!bottom_intra) &&
337 FFABS(top_mv[0] - bottom_mv[0]) +
338 FFABS(top_mv[1] + bottom_mv[1]) < 2)
341 for (x = 0; x < 8; x++) {
344 a = dst[offset + x + 7 * stride] - dst[offset + x + 6 * stride];
345 b = dst[offset + x + 8 * stride] - dst[offset + x + 7 * stride];
346 c = dst[offset + x + 9 * stride] - dst[offset + x + 8 * stride];
348 d = FFABS(b) - ((FFABS(a) + FFABS(c) + 1) >> 1);
356 if (!(top_damage && bottom_damage))
360 dst[offset + x + 7 * stride] = cm[dst[offset + x + 7 * stride] + ((d * 7) >> 4)];
361 dst[offset + x + 6 * stride] = cm[dst[offset + x + 6 * stride] + ((d * 5) >> 4)];
362 dst[offset + x + 5 * stride] = cm[dst[offset + x + 5 * stride] + ((d * 3) >> 4)];
363 dst[offset + x + 4 * stride] = cm[dst[offset + x + 4 * stride] + ((d * 1) >> 4)];
366 dst[offset + x + 8 * stride] = cm[dst[offset + x + 8 * stride] - ((d * 7) >> 4)];
367 dst[offset + x + 9 * stride] = cm[dst[offset + x + 9 * stride] - ((d * 5) >> 4)];
368 dst[offset + x + 10 * stride] = cm[dst[offset + x + 10 * stride] - ((d * 3) >> 4)];
369 dst[offset + x + 11 * stride] = cm[dst[offset + x + 11 * stride] - ((d * 1) >> 4)];
376 static void guess_mv(ERContext *s)
378 uint8_t *fixed = s->er_temp_buffer;
381 #define MV_UNCHANGED 1
382 const int mb_stride = s->mb_stride;
383 const int mb_width = s->mb_width;
384 int mb_height = s->mb_height;
385 int i, depth, num_avail;
386 int mb_x, mb_y, mot_step, mot_stride;
388 if (s->last_pic.f && s->last_pic.f->data[0])
389 mb_height = FFMIN(mb_height, (s->last_pic.f->height+15)>>4);
390 if (s->next_pic.f && s->next_pic.f->data[0])
391 mb_height = FFMIN(mb_height, (s->next_pic.f->height+15)>>4);
393 set_mv_strides(s, &mot_step, &mot_stride);
396 for (i = 0; i < mb_width * mb_height; i++) {
397 const int mb_xy = s->mb_index2xy[i];
399 int error = s->error_status_table[mb_xy];
401 if (IS_INTRA(s->cur_pic.mb_type[mb_xy]))
402 f = MV_FROZEN; // intra // FIXME check
403 if (!(error & ER_MV_ERROR))
404 f = MV_FROZEN; // inter with undamaged MV
409 else if(s->last_pic.f->data[0] && s->last_pic.motion_val[0]){
410 const int mb_y= mb_xy / s->mb_stride;
411 const int mb_x= mb_xy % s->mb_stride;
412 const int mot_index= (mb_x + mb_y*mot_stride) * mot_step;
413 s->cur_pic.motion_val[0][mot_index][0]= s->last_pic.motion_val[0][mot_index][0];
414 s->cur_pic.motion_val[0][mot_index][1]= s->last_pic.motion_val[0][mot_index][1];
415 s->cur_pic.ref_index[0][4*mb_xy] = s->last_pic.ref_index[0][4*mb_xy];
419 if ((!(s->avctx->error_concealment&FF_EC_GUESS_MVS)) ||
420 num_avail <= mb_width / 2) {
421 for (mb_y = 0; mb_y < mb_height; mb_y++) {
422 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
423 const int mb_xy = mb_x + mb_y * s->mb_stride;
424 int mv_dir = (s->last_pic.f && s->last_pic.f->data[0]) ? MV_DIR_FORWARD : MV_DIR_BACKWARD;
426 if (IS_INTRA(s->cur_pic.mb_type[mb_xy]))
428 if (!(s->error_status_table[mb_xy] & ER_MV_ERROR))
433 s->decode_mb(s->opaque, 0, mv_dir, MV_TYPE_16X16, &s->mv,
440 for (depth = 0; ; depth++) {
441 int changed, pass, none_left;
445 for (pass = 0; (changed || pass < 2) && pass < 10; pass++) {
450 for (mb_y = 0; mb_y < mb_height; mb_y++) {
451 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
452 const int mb_xy = mb_x + mb_y * s->mb_stride;
453 int mv_predictor[8][2] = { { 0 } };
457 int best_score = 256 * 256 * 256 * 64;
459 const int mot_index = (mb_x + mb_y * mot_stride) * mot_step;
460 int prev_x = 0, prev_y = 0, prev_ref = 0;
462 if ((mb_x ^ mb_y ^ pass) & 1)
465 if (fixed[mb_xy] == MV_FROZEN)
467 av_assert1(!IS_INTRA(s->cur_pic.mb_type[mb_xy]));
468 av_assert1(s->last_pic.f && s->last_pic.f->data[0]);
471 if (mb_x > 0 && fixed[mb_xy - 1] == MV_FROZEN)
473 if (mb_x + 1 < mb_width && fixed[mb_xy + 1] == MV_FROZEN)
475 if (mb_y > 0 && fixed[mb_xy - mb_stride] == MV_FROZEN)
477 if (mb_y + 1 < mb_height && fixed[mb_xy + mb_stride] == MV_FROZEN)
483 if (mb_x > 0 && fixed[mb_xy - 1 ] == MV_CHANGED)
485 if (mb_x + 1 < mb_width && fixed[mb_xy + 1 ] == MV_CHANGED)
487 if (mb_y > 0 && fixed[mb_xy - mb_stride] == MV_CHANGED)
489 if (mb_y + 1 < mb_height && fixed[mb_xy + mb_stride] == MV_CHANGED)
491 if (j == 0 && pass > 1)
496 if (mb_x > 0 && fixed[mb_xy - 1]) {
497 mv_predictor[pred_count][0] =
498 s->cur_pic.motion_val[0][mot_index - mot_step][0];
499 mv_predictor[pred_count][1] =
500 s->cur_pic.motion_val[0][mot_index - mot_step][1];
502 s->cur_pic.ref_index[0][4 * (mb_xy - 1)];
505 if (mb_x + 1 < mb_width && fixed[mb_xy + 1]) {
506 mv_predictor[pred_count][0] =
507 s->cur_pic.motion_val[0][mot_index + mot_step][0];
508 mv_predictor[pred_count][1] =
509 s->cur_pic.motion_val[0][mot_index + mot_step][1];
511 s->cur_pic.ref_index[0][4 * (mb_xy + 1)];
514 if (mb_y > 0 && fixed[mb_xy - mb_stride]) {
515 mv_predictor[pred_count][0] =
516 s->cur_pic.motion_val[0][mot_index - mot_stride * mot_step][0];
517 mv_predictor[pred_count][1] =
518 s->cur_pic.motion_val[0][mot_index - mot_stride * mot_step][1];
520 s->cur_pic.ref_index[0][4 * (mb_xy - s->mb_stride)];
523 if (mb_y + 1<mb_height && fixed[mb_xy + mb_stride]) {
524 mv_predictor[pred_count][0] =
525 s->cur_pic.motion_val[0][mot_index + mot_stride * mot_step][0];
526 mv_predictor[pred_count][1] =
527 s->cur_pic.motion_val[0][mot_index + mot_stride * mot_step][1];
529 s->cur_pic.ref_index[0][4 * (mb_xy + s->mb_stride)];
535 if (pred_count > 1) {
536 int sum_x = 0, sum_y = 0, sum_r = 0;
537 int max_x, max_y, min_x, min_y, max_r, min_r;
539 for (j = 0; j < pred_count; j++) {
540 sum_x += mv_predictor[j][0];
541 sum_y += mv_predictor[j][1];
543 if (j && ref[j] != ref[j - 1])
544 goto skip_mean_and_median;
548 mv_predictor[pred_count][0] = sum_x / j;
549 mv_predictor[pred_count][1] = sum_y / j;
550 ref[pred_count] = sum_r / j;
553 if (pred_count >= 3) {
554 min_y = min_x = min_r = 99999;
555 max_y = max_x = max_r = -99999;
557 min_x = min_y = max_x = max_y = min_r = max_r = 0;
559 for (j = 0; j < pred_count; j++) {
560 max_x = FFMAX(max_x, mv_predictor[j][0]);
561 max_y = FFMAX(max_y, mv_predictor[j][1]);
562 max_r = FFMAX(max_r, ref[j]);
563 min_x = FFMIN(min_x, mv_predictor[j][0]);
564 min_y = FFMIN(min_y, mv_predictor[j][1]);
565 min_r = FFMIN(min_r, ref[j]);
567 mv_predictor[pred_count + 1][0] = sum_x - max_x - min_x;
568 mv_predictor[pred_count + 1][1] = sum_y - max_y - min_y;
569 ref[pred_count + 1] = sum_r - max_r - min_r;
571 if (pred_count == 4) {
572 mv_predictor[pred_count + 1][0] /= 2;
573 mv_predictor[pred_count + 1][1] /= 2;
574 ref[pred_count + 1] /= 2;
579 skip_mean_and_median:
583 if (!fixed[mb_xy] && 0) {
584 if (s->avctx->codec_id == AV_CODEC_ID_H264) {
587 ff_thread_await_progress(s->last_pic.tf,
590 if (!s->last_pic.motion_val[0] ||
591 !s->last_pic.ref_index[0])
593 prev_x = s->last_pic.motion_val[0][mot_index][0];
594 prev_y = s->last_pic.motion_val[0][mot_index][1];
595 prev_ref = s->last_pic.ref_index[0][4 * mb_xy];
597 prev_x = s->cur_pic.motion_val[0][mot_index][0];
598 prev_y = s->cur_pic.motion_val[0][mot_index][1];
599 prev_ref = s->cur_pic.ref_index[0][4 * mb_xy];
603 mv_predictor[pred_count][0] = prev_x;
604 mv_predictor[pred_count][1] = prev_y;
605 ref[pred_count] = prev_ref;
610 for (j = 0; j < pred_count; j++) {
611 int *linesize = s->cur_pic.f->linesize;
613 uint8_t *src = s->cur_pic.f->data[0] +
614 mb_x * 16 + mb_y * 16 * linesize[0];
616 s->cur_pic.motion_val[0][mot_index][0] =
617 s->mv[0][0][0] = mv_predictor[j][0];
618 s->cur_pic.motion_val[0][mot_index][1] =
619 s->mv[0][0][1] = mv_predictor[j][1];
621 // predictor intra or otherwise not available
625 s->decode_mb(s->opaque, ref[j], MV_DIR_FORWARD,
626 MV_TYPE_16X16, &s->mv, mb_x, mb_y, 0, 0);
628 if (mb_x > 0 && fixed[mb_xy - 1]) {
630 for (k = 0; k < 16; k++)
631 score += FFABS(src[k * linesize[0] - 1] -
632 src[k * linesize[0]]);
634 if (mb_x + 1 < mb_width && fixed[mb_xy + 1]) {
636 for (k = 0; k < 16; k++)
637 score += FFABS(src[k * linesize[0] + 15] -
638 src[k * linesize[0] + 16]);
640 if (mb_y > 0 && fixed[mb_xy - mb_stride]) {
642 for (k = 0; k < 16; k++)
643 score += FFABS(src[k - linesize[0]] - src[k]);
645 if (mb_y + 1 < mb_height && fixed[mb_xy + mb_stride]) {
647 for (k = 0; k < 16; k++)
648 score += FFABS(src[k + linesize[0] * 15] -
649 src[k + linesize[0] * 16]);
652 if (score <= best_score) { // <= will favor the last MV
657 score_sum += best_score;
658 s->mv[0][0][0] = mv_predictor[best_pred][0];
659 s->mv[0][0][1] = mv_predictor[best_pred][1];
661 for (i = 0; i < mot_step; i++)
662 for (j = 0; j < mot_step; j++) {
663 s->cur_pic.motion_val[0][mot_index + i + j * mot_stride][0] = s->mv[0][0][0];
664 s->cur_pic.motion_val[0][mot_index + i + j * mot_stride][1] = s->mv[0][0][1];
667 s->decode_mb(s->opaque, ref[best_pred], MV_DIR_FORWARD,
668 MV_TYPE_16X16, &s->mv, mb_x, mb_y, 0, 0);
671 if (s->mv[0][0][0] != prev_x || s->mv[0][0][1] != prev_y) {
672 fixed[mb_xy] = MV_CHANGED;
675 fixed[mb_xy] = MV_UNCHANGED;
683 for (i = 0; i < mb_width * mb_height; i++) {
684 int mb_xy = s->mb_index2xy[i];
686 fixed[mb_xy] = MV_FROZEN;
691 static int is_intra_more_likely(ERContext *s)
693 int is_intra_likely, i, j, undamaged_count, skip_amount, mb_x, mb_y;
695 if (!s->last_pic.f || !s->last_pic.f->data[0])
696 return 1; // no previous frame available -> use spatial prediction
698 if (s->avctx->error_concealment & FF_EC_FAVOR_INTER)
702 for (i = 0; i < s->mb_num; i++) {
703 const int mb_xy = s->mb_index2xy[i];
704 const int error = s->error_status_table[mb_xy];
705 if (!((error & ER_DC_ERROR) && (error & ER_MV_ERROR)))
709 if (undamaged_count < 5)
710 return 0; // almost all MBs damaged -> use temporal prediction
712 // prevent dsp.sad() check, that requires access to the image
714 s->avctx->hwaccel && s->avctx->hwaccel->decode_mb &&
715 s->cur_pic.f->pict_type == AV_PICTURE_TYPE_I)
718 skip_amount = FFMAX(undamaged_count / 50, 1); // check only up to 50 MBs
722 for (mb_y = 0; mb_y < s->mb_height - 1; mb_y++) {
723 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
725 const int mb_xy = mb_x + mb_y * s->mb_stride;
727 error = s->error_status_table[mb_xy];
728 if ((error & ER_DC_ERROR) && (error & ER_MV_ERROR))
729 continue; // skip damaged
732 // skip a few to speed things up
733 if ((j % skip_amount) != 0)
736 if (s->cur_pic.f->pict_type == AV_PICTURE_TYPE_I) {
737 int *linesize = s->cur_pic.f->linesize;
738 uint8_t *mb_ptr = s->cur_pic.f->data[0] +
739 mb_x * 16 + mb_y * 16 * linesize[0];
740 uint8_t *last_mb_ptr = s->last_pic.f->data[0] +
741 mb_x * 16 + mb_y * 16 * linesize[0];
743 if (s->avctx->codec_id == AV_CODEC_ID_H264) {
746 ff_thread_await_progress(s->last_pic.tf, mb_y, 0);
748 is_intra_likely += s->mecc.sad[0](NULL, last_mb_ptr, mb_ptr,
750 // FIXME need await_progress() here
751 is_intra_likely -= s->mecc.sad[0](NULL, last_mb_ptr,
752 last_mb_ptr + linesize[0] * 16,
755 if (IS_INTRA(s->cur_pic.mb_type[mb_xy]))
762 // av_log(NULL, AV_LOG_ERROR, "is_intra_likely: %d type:%d\n", is_intra_likely, s->pict_type);
763 return is_intra_likely > 0;
766 void ff_er_frame_start(ERContext *s)
768 if (!s->avctx->error_concealment)
771 if (!s->mecc_inited) {
772 ff_me_cmp_init(&s->mecc, s->avctx);
776 memset(s->error_status_table, ER_MB_ERROR | VP_START | ER_MB_END,
777 s->mb_stride * s->mb_height * sizeof(uint8_t));
778 s->error_count = 3 * s->mb_num;
779 s->error_occurred = 0;
782 static int er_supported(ERContext *s)
784 if(s->avctx->hwaccel && s->avctx->hwaccel->decode_slice ||
786 s->avctx->codec->capabilities&AV_CODEC_CAP_HWACCEL_VDPAU ||
789 s->cur_pic.field_picture
797 * @param endx x component of the last macroblock, can be -1
798 * for the last of the previous line
799 * @param status the status at the end (ER_MV_END, ER_AC_ERROR, ...), it is
800 * assumed that no earlier end or error of the same type occurred
802 void ff_er_add_slice(ERContext *s, int startx, int starty,
803 int endx, int endy, int status)
805 const int start_i = av_clip(startx + starty * s->mb_width, 0, s->mb_num - 1);
806 const int end_i = av_clip(endx + endy * s->mb_width, 0, s->mb_num);
807 const int start_xy = s->mb_index2xy[start_i];
808 const int end_xy = s->mb_index2xy[end_i];
811 if (s->avctx->hwaccel && s->avctx->hwaccel->decode_slice)
814 if (start_i > end_i || start_xy > end_xy) {
815 av_log(s->avctx, AV_LOG_ERROR,
816 "internal error, slice end before start\n");
820 if (!s->avctx->error_concealment)
824 if (status & (ER_AC_ERROR | ER_AC_END)) {
825 mask &= ~(ER_AC_ERROR | ER_AC_END);
826 avpriv_atomic_int_add_and_fetch(&s->error_count, start_i - end_i - 1);
828 if (status & (ER_DC_ERROR | ER_DC_END)) {
829 mask &= ~(ER_DC_ERROR | ER_DC_END);
830 avpriv_atomic_int_add_and_fetch(&s->error_count, start_i - end_i - 1);
832 if (status & (ER_MV_ERROR | ER_MV_END)) {
833 mask &= ~(ER_MV_ERROR | ER_MV_END);
834 avpriv_atomic_int_add_and_fetch(&s->error_count, start_i - end_i - 1);
837 if (status & ER_MB_ERROR) {
838 s->error_occurred = 1;
839 avpriv_atomic_int_set(&s->error_count, INT_MAX);
843 memset(&s->error_status_table[start_xy], 0,
844 (end_xy - start_xy) * sizeof(uint8_t));
847 for (i = start_xy; i < end_xy; i++)
848 s->error_status_table[i] &= mask;
851 if (end_i == s->mb_num)
852 avpriv_atomic_int_set(&s->error_count, INT_MAX);
854 s->error_status_table[end_xy] &= mask;
855 s->error_status_table[end_xy] |= status;
858 s->error_status_table[start_xy] |= VP_START;
860 if (start_xy > 0 && !(s->avctx->active_thread_type & FF_THREAD_SLICE) &&
861 er_supported(s) && s->avctx->skip_top * s->mb_width < start_i) {
862 int prev_status = s->error_status_table[s->mb_index2xy[start_i - 1]];
864 prev_status &= ~ VP_START;
865 if (prev_status != (ER_MV_END | ER_DC_END | ER_AC_END)) {
866 s->error_occurred = 1;
867 avpriv_atomic_int_set(&s->error_count, INT_MAX);
872 void ff_er_frame_end(ERContext *s)
874 int *linesize = NULL;
875 int i, mb_x, mb_y, error, error_type, dc_error, mv_error, ac_error;
877 int threshold_part[4] = { 100, 100, 100 };
880 int size = s->b8_stride * 2 * s->mb_height;
882 /* We do not support ER of field pictures yet,
883 * though it should not crash if enabled. */
884 if (!s->avctx->error_concealment || s->error_count == 0 ||
887 s->error_count == 3 * s->mb_width *
888 (s->avctx->skip_top + s->avctx->skip_bottom)) {
891 linesize = s->cur_pic.f->linesize;
892 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
893 int status = s->error_status_table[mb_x + (s->mb_height - 1) * s->mb_stride];
898 if ( mb_x == s->mb_width
899 && s->avctx->codec_id == AV_CODEC_ID_MPEG2VIDEO
900 && (s->avctx->height&16)
901 && s->error_count == 3 * s->mb_width * (s->avctx->skip_top + s->avctx->skip_bottom + 1)
903 av_log(s->avctx, AV_LOG_DEBUG, "ignoring last missing slice\n");
908 if (s->last_pic.f->width != s->cur_pic.f->width ||
909 s->last_pic.f->height != s->cur_pic.f->height ||
910 s->last_pic.f->format != s->cur_pic.f->format) {
911 av_log(s->avctx, AV_LOG_WARNING, "Cannot use previous picture in error concealment\n");
912 memset(&s->last_pic, 0, sizeof(s->last_pic));
916 if (s->next_pic.f->width != s->cur_pic.f->width ||
917 s->next_pic.f->height != s->cur_pic.f->height ||
918 s->next_pic.f->format != s->cur_pic.f->format) {
919 av_log(s->avctx, AV_LOG_WARNING, "Cannot use next picture in error concealment\n");
920 memset(&s->next_pic, 0, sizeof(s->next_pic));
924 if (!s->cur_pic.motion_val[0] || !s->cur_pic.ref_index[0]) {
925 av_log(s->avctx, AV_LOG_ERROR, "Warning MVs not available\n");
927 for (i = 0; i < 2; i++) {
928 s->ref_index_buf[i] = av_buffer_allocz(s->mb_stride * s->mb_height * 4 * sizeof(uint8_t));
929 s->motion_val_buf[i] = av_buffer_allocz((size + 4) * 2 * sizeof(uint16_t));
930 if (!s->ref_index_buf[i] || !s->motion_val_buf[i])
932 s->cur_pic.ref_index[i] = s->ref_index_buf[i]->data;
933 s->cur_pic.motion_val[i] = (int16_t (*)[2])s->motion_val_buf[i]->data + 4;
936 for (i = 0; i < 2; i++) {
937 av_buffer_unref(&s->ref_index_buf[i]);
938 av_buffer_unref(&s->motion_val_buf[i]);
939 s->cur_pic.ref_index[i] = NULL;
940 s->cur_pic.motion_val[i] = NULL;
946 if (s->avctx->debug & FF_DEBUG_ER) {
947 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
948 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
949 int status = s->error_status_table[mb_x + mb_y * s->mb_stride];
951 av_log(s->avctx, AV_LOG_DEBUG, "%2X ", status);
953 av_log(s->avctx, AV_LOG_DEBUG, "\n");
958 /* handle overlapping slices */
959 for (error_type = 1; error_type <= 3; error_type++) {
962 for (i = s->mb_num - 1; i >= 0; i--) {
963 const int mb_xy = s->mb_index2xy[i];
964 int error = s->error_status_table[mb_xy];
966 if (error & (1 << error_type))
968 if (error & (8 << error_type))
972 s->error_status_table[mb_xy] |= 1 << error_type;
974 if (error & VP_START)
980 /* handle slices with partitions of different length */
981 if (s->partitioned_frame) {
984 for (i = s->mb_num - 1; i >= 0; i--) {
985 const int mb_xy = s->mb_index2xy[i];
986 int error = s->error_status_table[mb_xy];
988 if (error & ER_AC_END)
990 if ((error & ER_MV_END) ||
991 (error & ER_DC_END) ||
992 (error & ER_AC_ERROR))
996 s->error_status_table[mb_xy]|= ER_AC_ERROR;
998 if (error & VP_START)
1003 /* handle missing slices */
1004 if (s->avctx->err_recognition & AV_EF_EXPLODE) {
1008 for (i = s->mb_num - 2; i >= s->mb_width + 100; i--) {
1009 const int mb_xy = s->mb_index2xy[i];
1010 int error1 = s->error_status_table[mb_xy];
1011 int error2 = s->error_status_table[s->mb_index2xy[i + 1]];
1013 if (error1 & VP_START)
1016 if (error2 == (VP_START | ER_MB_ERROR | ER_MB_END) &&
1017 error1 != (VP_START | ER_MB_ERROR | ER_MB_END) &&
1018 ((error1 & ER_AC_END) || (error1 & ER_DC_END) ||
1019 (error1 & ER_MV_END))) {
1025 s->error_status_table[mb_xy] |= ER_MB_ERROR;
1030 /* backward mark errors */
1032 for (error_type = 1; error_type <= 3; error_type++) {
1033 for (i = s->mb_num - 1; i >= 0; i--) {
1034 const int mb_xy = s->mb_index2xy[i];
1035 int error = s->error_status_table[mb_xy];
1037 if (!s->mbskip_table || !s->mbskip_table[mb_xy]) // FIXME partition specific
1039 if (error & (1 << error_type))
1042 if (s->partitioned_frame) {
1043 if (distance < threshold_part[error_type - 1])
1044 s->error_status_table[mb_xy] |= 1 << error_type;
1046 if (distance < threshold)
1047 s->error_status_table[mb_xy] |= 1 << error_type;
1050 if (error & VP_START)
1056 /* forward mark errors */
1058 for (i = 0; i < s->mb_num; i++) {
1059 const int mb_xy = s->mb_index2xy[i];
1060 int old_error = s->error_status_table[mb_xy];
1062 if (old_error & VP_START) {
1063 error = old_error & ER_MB_ERROR;
1065 error |= old_error & ER_MB_ERROR;
1066 s->error_status_table[mb_xy] |= error;
1070 /* handle not partitioned case */
1071 if (!s->partitioned_frame) {
1072 for (i = 0; i < s->mb_num; i++) {
1073 const int mb_xy = s->mb_index2xy[i];
1074 int error = s->error_status_table[mb_xy];
1075 if (error & ER_MB_ERROR)
1076 error |= ER_MB_ERROR;
1077 s->error_status_table[mb_xy] = error;
1082 dc_error = ac_error = mv_error = 0;
1083 for (i = 0; i < s->mb_num; i++) {
1084 const int mb_xy = s->mb_index2xy[i];
1085 int error = s->error_status_table[mb_xy];
1086 if (error & ER_DC_ERROR)
1088 if (error & ER_AC_ERROR)
1090 if (error & ER_MV_ERROR)
1093 av_log(s->avctx, AV_LOG_INFO, "concealing %d DC, %d AC, %d MV errors in %c frame\n",
1094 dc_error, ac_error, mv_error, av_get_picture_type_char(s->cur_pic.f->pict_type));
1096 is_intra_likely = is_intra_more_likely(s);
1098 /* set unknown mb-type to most likely */
1099 for (i = 0; i < s->mb_num; i++) {
1100 const int mb_xy = s->mb_index2xy[i];
1101 int error = s->error_status_table[mb_xy];
1102 if (!((error & ER_DC_ERROR) && (error & ER_MV_ERROR)))
1105 if (is_intra_likely)
1106 s->cur_pic.mb_type[mb_xy] = MB_TYPE_INTRA4x4;
1108 s->cur_pic.mb_type[mb_xy] = MB_TYPE_16x16 | MB_TYPE_L0;
1111 // change inter to intra blocks if no reference frames are available
1112 if (!(s->last_pic.f && s->last_pic.f->data[0]) &&
1113 !(s->next_pic.f && s->next_pic.f->data[0]))
1114 for (i = 0; i < s->mb_num; i++) {
1115 const int mb_xy = s->mb_index2xy[i];
1116 if (!IS_INTRA(s->cur_pic.mb_type[mb_xy]))
1117 s->cur_pic.mb_type[mb_xy] = MB_TYPE_INTRA4x4;
1120 /* handle inter blocks with damaged AC */
1121 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1122 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1123 const int mb_xy = mb_x + mb_y * s->mb_stride;
1124 const int mb_type = s->cur_pic.mb_type[mb_xy];
1125 const int dir = !(s->last_pic.f && s->last_pic.f->data[0]);
1126 const int mv_dir = dir ? MV_DIR_BACKWARD : MV_DIR_FORWARD;
1129 int error = s->error_status_table[mb_xy];
1131 if (IS_INTRA(mb_type))
1133 if (error & ER_MV_ERROR)
1134 continue; // inter with damaged MV
1135 if (!(error & ER_AC_ERROR))
1136 continue; // undamaged inter
1138 if (IS_8X8(mb_type)) {
1139 int mb_index = mb_x * 2 + mb_y * 2 * s->b8_stride;
1141 mv_type = MV_TYPE_8X8;
1142 for (j = 0; j < 4; j++) {
1143 s->mv[0][j][0] = s->cur_pic.motion_val[dir][mb_index + (j & 1) + (j >> 1) * s->b8_stride][0];
1144 s->mv[0][j][1] = s->cur_pic.motion_val[dir][mb_index + (j & 1) + (j >> 1) * s->b8_stride][1];
1147 mv_type = MV_TYPE_16X16;
1148 s->mv[0][0][0] = s->cur_pic.motion_val[dir][mb_x * 2 + mb_y * 2 * s->b8_stride][0];
1149 s->mv[0][0][1] = s->cur_pic.motion_val[dir][mb_x * 2 + mb_y * 2 * s->b8_stride][1];
1152 s->decode_mb(s->opaque, 0 /* FIXME h264 partitioned slices need this set */,
1153 mv_dir, mv_type, &s->mv, mb_x, mb_y, 0, 0);
1158 if (s->cur_pic.f->pict_type == AV_PICTURE_TYPE_B) {
1159 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1160 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1161 int xy = mb_x * 2 + mb_y * 2 * s->b8_stride;
1162 const int mb_xy = mb_x + mb_y * s->mb_stride;
1163 const int mb_type = s->cur_pic.mb_type[mb_xy];
1164 int mv_dir = MV_DIR_FORWARD | MV_DIR_BACKWARD;
1166 int error = s->error_status_table[mb_xy];
1168 if (IS_INTRA(mb_type))
1170 if (!(error & ER_MV_ERROR))
1171 continue; // inter with undamaged MV
1172 if (!(error & ER_AC_ERROR))
1173 continue; // undamaged inter
1175 if (!(s->last_pic.f && s->last_pic.f->data[0]))
1176 mv_dir &= ~MV_DIR_FORWARD;
1177 if (!(s->next_pic.f && s->next_pic.f->data[0]))
1178 mv_dir &= ~MV_DIR_BACKWARD;
1181 int time_pp = s->pp_time;
1182 int time_pb = s->pb_time;
1184 av_assert0(s->avctx->codec_id != AV_CODEC_ID_H264);
1185 ff_thread_await_progress(s->next_pic.tf, mb_y, 0);
1187 s->mv[0][0][0] = s->next_pic.motion_val[0][xy][0] * time_pb / time_pp;
1188 s->mv[0][0][1] = s->next_pic.motion_val[0][xy][1] * time_pb / time_pp;
1189 s->mv[1][0][0] = s->next_pic.motion_val[0][xy][0] * (time_pb - time_pp) / time_pp;
1190 s->mv[1][0][1] = s->next_pic.motion_val[0][xy][1] * (time_pb - time_pp) / time_pp;
1198 s->decode_mb(s->opaque, 0, mv_dir, MV_TYPE_16X16, &s->mv,
1205 /* the filters below manipulate raw image, skip them */
1206 if (CONFIG_XVMC && s->avctx->hwaccel && s->avctx->hwaccel->decode_mb)
1208 /* fill DC for inter blocks */
1209 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1210 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1211 int dc, dcu, dcv, y, n;
1213 uint8_t *dest_y, *dest_cb, *dest_cr;
1214 const int mb_xy = mb_x + mb_y * s->mb_stride;
1215 const int mb_type = s->cur_pic.mb_type[mb_xy];
1217 // error = s->error_status_table[mb_xy];
1219 if (IS_INTRA(mb_type) && s->partitioned_frame)
1221 // if (error & ER_MV_ERROR)
1222 // continue; // inter data damaged FIXME is this good?
1224 dest_y = s->cur_pic.f->data[0] + mb_x * 16 + mb_y * 16 * linesize[0];
1225 dest_cb = s->cur_pic.f->data[1] + mb_x * 8 + mb_y * 8 * linesize[1];
1226 dest_cr = s->cur_pic.f->data[2] + mb_x * 8 + mb_y * 8 * linesize[2];
1228 dc_ptr = &s->dc_val[0][mb_x * 2 + mb_y * 2 * s->b8_stride];
1229 for (n = 0; n < 4; n++) {
1231 for (y = 0; y < 8; y++) {
1233 for (x = 0; x < 8; x++)
1234 dc += dest_y[x + (n & 1) * 8 +
1235 (y + (n >> 1) * 8) * linesize[0]];
1237 dc_ptr[(n & 1) + (n >> 1) * s->b8_stride] = (dc + 4) >> 3;
1240 if (!s->cur_pic.f->data[2])
1244 for (y = 0; y < 8; y++) {
1246 for (x = 0; x < 8; x++) {
1247 dcu += dest_cb[x + y * linesize[1]];
1248 dcv += dest_cr[x + y * linesize[2]];
1251 s->dc_val[1][mb_x + mb_y * s->mb_stride] = (dcu + 4) >> 3;
1252 s->dc_val[2][mb_x + mb_y * s->mb_stride] = (dcv + 4) >> 3;
1256 /* guess DC for damaged blocks */
1257 guess_dc(s, s->dc_val[0], s->mb_width*2, s->mb_height*2, s->b8_stride, 1);
1258 guess_dc(s, s->dc_val[1], s->mb_width , s->mb_height , s->mb_stride, 0);
1259 guess_dc(s, s->dc_val[2], s->mb_width , s->mb_height , s->mb_stride, 0);
1262 /* filter luma DC */
1263 filter181(s->dc_val[0], s->mb_width * 2, s->mb_height * 2, s->b8_stride);
1266 /* render DC only intra */
1267 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1268 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1269 uint8_t *dest_y, *dest_cb, *dest_cr;
1270 const int mb_xy = mb_x + mb_y * s->mb_stride;
1271 const int mb_type = s->cur_pic.mb_type[mb_xy];
1273 int error = s->error_status_table[mb_xy];
1275 if (IS_INTER(mb_type))
1277 if (!(error & ER_AC_ERROR))
1278 continue; // undamaged
1280 dest_y = s->cur_pic.f->data[0] + mb_x * 16 + mb_y * 16 * linesize[0];
1281 dest_cb = s->cur_pic.f->data[1] + mb_x * 8 + mb_y * 8 * linesize[1];
1282 dest_cr = s->cur_pic.f->data[2] + mb_x * 8 + mb_y * 8 * linesize[2];
1283 if (!s->cur_pic.f->data[2])
1284 dest_cb = dest_cr = NULL;
1286 put_dc(s, dest_y, dest_cb, dest_cr, mb_x, mb_y);
1291 if (s->avctx->error_concealment & FF_EC_DEBLOCK) {
1292 /* filter horizontal block boundaries */
1293 h_block_filter(s, s->cur_pic.f->data[0], s->mb_width * 2,
1294 s->mb_height * 2, linesize[0], 1);
1296 /* filter vertical block boundaries */
1297 v_block_filter(s, s->cur_pic.f->data[0], s->mb_width * 2,
1298 s->mb_height * 2, linesize[0], 1);
1300 if (s->cur_pic.f->data[2]) {
1301 h_block_filter(s, s->cur_pic.f->data[1], s->mb_width,
1302 s->mb_height, linesize[1], 0);
1303 h_block_filter(s, s->cur_pic.f->data[2], s->mb_width,
1304 s->mb_height, linesize[2], 0);
1305 v_block_filter(s, s->cur_pic.f->data[1], s->mb_width,
1306 s->mb_height, linesize[1], 0);
1307 v_block_filter(s, s->cur_pic.f->data[2], s->mb_width,
1308 s->mb_height, linesize[2], 0);
1313 /* clean a few tables */
1314 for (i = 0; i < s->mb_num; i++) {
1315 const int mb_xy = s->mb_index2xy[i];
1316 int error = s->error_status_table[mb_xy];
1318 if (s->mbskip_table && s->cur_pic.f->pict_type != AV_PICTURE_TYPE_B &&
1319 (error & (ER_DC_ERROR | ER_MV_ERROR | ER_AC_ERROR))) {
1320 s->mbskip_table[mb_xy] = 0;
1322 if (s->mbintra_table)
1323 s->mbintra_table[mb_xy] = 1;
1326 for (i = 0; i < 2; i++) {
1327 av_buffer_unref(&s->ref_index_buf[i]);
1328 av_buffer_unref(&s->motion_val_buf[i]);
1329 s->cur_pic.ref_index[i] = NULL;
1330 s->cur_pic.motion_val[i] = NULL;
1333 memset(&s->cur_pic, 0, sizeof(ERPicture));
1334 memset(&s->last_pic, 0, sizeof(ERPicture));
1335 memset(&s->next_pic, 0, sizeof(ERPicture));