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.
32 #include "mpegvideo.h"
34 #include "rectangle.h"
38 * H264 redefines mb_intra so it is not mistakely used (its uninitialized in h264)
39 * but error concealment must support both h264 and h263 thus we must undo this
43 static void decode_mb(MpegEncContext *s, int ref)
45 s->dest[0] = s->current_picture.f.data[0] + (s->mb_y * 16 * s->linesize) + s->mb_x * 16;
46 s->dest[1] = s->current_picture.f.data[1] + (s->mb_y * (16 >> s->chroma_y_shift) * s->uvlinesize) + s->mb_x * (16 >> s->chroma_x_shift);
47 s->dest[2] = s->current_picture.f.data[2] + (s->mb_y * (16 >> s->chroma_y_shift) * s->uvlinesize) + s->mb_x * (16 >> s->chroma_x_shift);
49 ff_init_block_index(s);
50 ff_update_block_index(s);
51 s->dest[1] += (16 >> s->chroma_x_shift) - 8;
52 s->dest[2] += (16 >> s->chroma_x_shift) - 8;
54 if (CONFIG_H264_DECODER && s->codec_id == AV_CODEC_ID_H264) {
55 H264Context *h = (void*)s;
56 h->mb_xy = s->mb_x + s->mb_y * s->mb_stride;
57 memset(h->non_zero_count_cache, 0, sizeof(h->non_zero_count_cache));
59 /* FIXME: It is possible albeit uncommon that slice references
60 * differ between slices. We take the easy approach and ignore
61 * it for now. If this turns out to have any relevance in
62 * practice then correct remapping should be added. */
63 if (ref >= h->ref_count[0])
65 if (!h->ref_list[0][ref].f.data[0]) {
66 av_log(s->avctx, AV_LOG_DEBUG, "Reference not available for error concealing\n");
69 fill_rectangle(&s->current_picture.f.ref_index[0][4 * h->mb_xy],
71 fill_rectangle(&h->ref_cache[0][scan8[0]], 4, 4, 8, ref, 1);
72 fill_rectangle(h->mv_cache[0][scan8[0]], 4, 4, 8,
73 pack16to32(s->mv[0][0][0], s->mv[0][0][1]), 4);
75 h->mb_field_decoding_flag = 0;
76 ff_h264_hl_decode_mb(h);
79 ff_MPV_decode_mb(s, s->block);
84 * @param stride the number of MVs to get to the next row
85 * @param mv_step the number of MVs per row or column in a macroblock
87 static void set_mv_strides(MpegEncContext *s, int *mv_step, int *stride)
89 if (s->codec_id == AV_CODEC_ID_H264) {
90 H264Context *h = (void*)s;
91 av_assert0(s->quarter_sample);
93 *stride = h->b_stride;
96 *stride = s->b8_stride;
101 * Replace the current MB with a flat dc-only version.
103 static void put_dc(MpegEncContext *s, uint8_t *dest_y, uint8_t *dest_cb,
104 uint8_t *dest_cr, int mb_x, int mb_y)
106 int dc, dcu, dcv, y, i;
107 for (i = 0; i < 4; i++) {
108 dc = s->dc_val[0][mb_x * 2 + (i & 1) + (mb_y * 2 + (i >> 1)) * s->b8_stride];
113 for (y = 0; y < 8; y++) {
115 for (x = 0; x < 8; x++)
116 dest_y[x + (i & 1) * 8 + (y + (i >> 1) * 8) * s->linesize] = dc / 8;
119 dcu = s->dc_val[1][mb_x + mb_y * s->mb_stride];
120 dcv = s->dc_val[2][mb_x + mb_y * s->mb_stride];
129 for (y = 0; y < 8; y++) {
131 for (x = 0; x < 8; x++) {
132 dest_cb[x + y * s->uvlinesize] = dcu / 8;
133 dest_cr[x + y * s->uvlinesize] = dcv / 8;
138 static void filter181(int16_t *data, int width, int height, int stride)
142 /* horizontal filter */
143 for (y = 1; y < height - 1; y++) {
144 int prev_dc = data[0 + y * stride];
146 for (x = 1; x < width - 1; x++) {
149 data[x + y * stride] * 8 -
150 data[x + 1 + y * stride];
151 dc = (dc * 10923 + 32768) >> 16;
152 prev_dc = data[x + y * stride];
153 data[x + y * stride] = dc;
157 /* vertical filter */
158 for (x = 1; x < width - 1; x++) {
159 int prev_dc = data[x];
161 for (y = 1; y < height - 1; y++) {
165 data[x + y * stride] * 8 -
166 data[x + (y + 1) * stride];
167 dc = (dc * 10923 + 32768) >> 16;
168 prev_dc = data[x + y * stride];
169 data[x + y * stride] = dc;
175 * guess the dc of blocks which do not have an undamaged dc
176 * @param w width in 8 pixel blocks
177 * @param h height in 8 pixel blocks
179 static void guess_dc(MpegEncContext *s, int16_t *dc, int w,
180 int h, int stride, int is_luma)
183 int16_t (*col )[4] = av_malloc(stride*h*sizeof( int16_t)*4);
184 uint32_t (*dist)[4] = av_malloc(stride*h*sizeof(uint32_t)*4);
187 av_log(s->avctx, AV_LOG_ERROR, "guess_dc() is out of memory\n");
191 for(b_y=0; b_y<h; b_y++){
194 for(b_x=0; b_x<w; b_x++){
195 int mb_index_j= (b_x>>is_luma) + (b_y>>is_luma)*s->mb_stride;
196 int error_j= s->error_status_table[mb_index_j];
197 int intra_j = IS_INTRA(s->current_picture.f.mb_type[mb_index_j]);
198 if(intra_j==0 || !(error_j&ER_DC_ERROR)){
199 color= dc[b_x + b_y*stride];
202 col [b_x + b_y*stride][1]= color;
203 dist[b_x + b_y*stride][1]= distance >= 0 ? b_x-distance : 9999;
207 for(b_x=w-1; b_x>=0; b_x--){
208 int mb_index_j= (b_x>>is_luma) + (b_y>>is_luma)*s->mb_stride;
209 int error_j= s->error_status_table[mb_index_j];
210 int intra_j = IS_INTRA(s->current_picture.f.mb_type[mb_index_j]);
211 if(intra_j==0 || !(error_j&ER_DC_ERROR)){
212 color= dc[b_x + b_y*stride];
215 col [b_x + b_y*stride][0]= color;
216 dist[b_x + b_y*stride][0]= distance >= 0 ? distance-b_x : 9999;
219 for(b_x=0; b_x<w; b_x++){
222 for(b_y=0; b_y<h; b_y++){
223 int mb_index_j= (b_x>>is_luma) + (b_y>>is_luma)*s->mb_stride;
224 int error_j= s->error_status_table[mb_index_j];
225 int intra_j = IS_INTRA(s->current_picture.f.mb_type[mb_index_j]);
226 if(intra_j==0 || !(error_j&ER_DC_ERROR)){
227 color= dc[b_x + b_y*stride];
230 col [b_x + b_y*stride][3]= color;
231 dist[b_x + b_y*stride][3]= distance >= 0 ? b_y-distance : 9999;
235 for(b_y=h-1; b_y>=0; b_y--){
236 int mb_index_j= (b_x>>is_luma) + (b_y>>is_luma)*s->mb_stride;
237 int error_j= s->error_status_table[mb_index_j];
238 int intra_j = IS_INTRA(s->current_picture.f.mb_type[mb_index_j]);
239 if(intra_j==0 || !(error_j&ER_DC_ERROR)){
240 color= dc[b_x + b_y*stride];
243 col [b_x + b_y*stride][2]= color;
244 dist[b_x + b_y*stride][2]= distance >= 0 ? distance-b_y : 9999;
248 for (b_y = 0; b_y < h; b_y++) {
249 for (b_x = 0; b_x < w; b_x++) {
250 int mb_index, error, j;
251 int64_t guess, weight_sum;
252 mb_index = (b_x >> is_luma) + (b_y >> is_luma) * s->mb_stride;
253 error = s->error_status_table[mb_index];
255 if (IS_INTER(s->current_picture.f.mb_type[mb_index]))
257 if (!(error & ER_DC_ERROR))
262 for (j = 0; j < 4; j++) {
263 int64_t weight = 256 * 256 * 256 * 16 / FFMAX(dist[b_x + b_y*stride][j], 1);
264 guess += weight*(int64_t)col[b_x + b_y*stride][j];
265 weight_sum += weight;
267 guess = (guess + weight_sum / 2) / weight_sum;
268 dc[b_x + b_y * stride] = guess;
278 * simple horizontal deblocking filter used for error resilience
279 * @param w width in 8 pixel blocks
280 * @param h height in 8 pixel blocks
282 static void h_block_filter(MpegEncContext *s, uint8_t *dst, int w,
283 int h, int stride, int is_luma)
285 int b_x, b_y, mvx_stride, mvy_stride;
286 uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
287 set_mv_strides(s, &mvx_stride, &mvy_stride);
288 mvx_stride >>= is_luma;
289 mvy_stride *= mvx_stride;
291 for (b_y = 0; b_y < h; b_y++) {
292 for (b_x = 0; b_x < w - 1; b_x++) {
294 int left_status = s->error_status_table[( b_x >> is_luma) + (b_y >> is_luma) * s->mb_stride];
295 int right_status = s->error_status_table[((b_x + 1) >> is_luma) + (b_y >> is_luma) * s->mb_stride];
296 int left_intra = IS_INTRA(s->current_picture.f.mb_type[( b_x >> is_luma) + (b_y >> is_luma) * s->mb_stride]);
297 int right_intra = IS_INTRA(s->current_picture.f.mb_type[((b_x + 1) >> is_luma) + (b_y >> is_luma) * s->mb_stride]);
298 int left_damage = left_status & ER_MB_ERROR;
299 int right_damage = right_status & ER_MB_ERROR;
300 int offset = b_x * 8 + b_y * stride * 8;
301 int16_t *left_mv = s->current_picture.f.motion_val[0][mvy_stride * b_y + mvx_stride * b_x];
302 int16_t *right_mv = s->current_picture.f.motion_val[0][mvy_stride * b_y + mvx_stride * (b_x + 1)];
303 if (!(left_damage || right_damage))
304 continue; // both undamaged
305 if ((!left_intra) && (!right_intra) &&
306 FFABS(left_mv[0] - right_mv[0]) +
307 FFABS(left_mv[1] + right_mv[1]) < 2)
310 for (y = 0; y < 8; y++) {
313 a = dst[offset + 7 + y * stride] - dst[offset + 6 + y * stride];
314 b = dst[offset + 8 + y * stride] - dst[offset + 7 + y * stride];
315 c = dst[offset + 9 + y * stride] - dst[offset + 8 + y * stride];
317 d = FFABS(b) - ((FFABS(a) + FFABS(c) + 1) >> 1);
325 if (!(left_damage && right_damage))
329 dst[offset + 7 + y * stride] = cm[dst[offset + 7 + y * stride] + ((d * 7) >> 4)];
330 dst[offset + 6 + y * stride] = cm[dst[offset + 6 + y * stride] + ((d * 5) >> 4)];
331 dst[offset + 5 + y * stride] = cm[dst[offset + 5 + y * stride] + ((d * 3) >> 4)];
332 dst[offset + 4 + y * stride] = cm[dst[offset + 4 + y * stride] + ((d * 1) >> 4)];
335 dst[offset + 8 + y * stride] = cm[dst[offset + 8 + y * stride] - ((d * 7) >> 4)];
336 dst[offset + 9 + y * stride] = cm[dst[offset + 9 + y * stride] - ((d * 5) >> 4)];
337 dst[offset + 10+ y * stride] = cm[dst[offset + 10 + y * stride] - ((d * 3) >> 4)];
338 dst[offset + 11+ y * stride] = cm[dst[offset + 11 + y * stride] - ((d * 1) >> 4)];
346 * simple vertical deblocking filter used for error resilience
347 * @param w width in 8 pixel blocks
348 * @param h height in 8 pixel blocks
350 static void v_block_filter(MpegEncContext *s, uint8_t *dst, int w, int h,
351 int stride, int is_luma)
353 int b_x, b_y, mvx_stride, mvy_stride;
354 uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
355 set_mv_strides(s, &mvx_stride, &mvy_stride);
356 mvx_stride >>= is_luma;
357 mvy_stride *= mvx_stride;
359 for (b_y = 0; b_y < h - 1; b_y++) {
360 for (b_x = 0; b_x < w; b_x++) {
362 int top_status = s->error_status_table[(b_x >> is_luma) + (b_y >> is_luma) * s->mb_stride];
363 int bottom_status = s->error_status_table[(b_x >> is_luma) + ((b_y + 1) >> is_luma) * s->mb_stride];
364 int top_intra = IS_INTRA(s->current_picture.f.mb_type[(b_x >> is_luma) + ( b_y >> is_luma) * s->mb_stride]);
365 int bottom_intra = IS_INTRA(s->current_picture.f.mb_type[(b_x >> is_luma) + ((b_y + 1) >> is_luma) * s->mb_stride]);
366 int top_damage = top_status & ER_MB_ERROR;
367 int bottom_damage = bottom_status & ER_MB_ERROR;
368 int offset = b_x * 8 + b_y * stride * 8;
370 int16_t *top_mv = s->current_picture.f.motion_val[0][mvy_stride * b_y + mvx_stride * b_x];
371 int16_t *bottom_mv = s->current_picture.f.motion_val[0][mvy_stride * (b_y + 1) + mvx_stride * b_x];
373 if (!(top_damage || bottom_damage))
374 continue; // both undamaged
376 if ((!top_intra) && (!bottom_intra) &&
377 FFABS(top_mv[0] - bottom_mv[0]) +
378 FFABS(top_mv[1] + bottom_mv[1]) < 2)
381 for (x = 0; x < 8; x++) {
384 a = dst[offset + x + 7 * stride] - dst[offset + x + 6 * stride];
385 b = dst[offset + x + 8 * stride] - dst[offset + x + 7 * stride];
386 c = dst[offset + x + 9 * stride] - dst[offset + x + 8 * stride];
388 d = FFABS(b) - ((FFABS(a) + FFABS(c) + 1) >> 1);
396 if (!(top_damage && bottom_damage))
400 dst[offset + x + 7 * stride] = cm[dst[offset + x + 7 * stride] + ((d * 7) >> 4)];
401 dst[offset + x + 6 * stride] = cm[dst[offset + x + 6 * stride] + ((d * 5) >> 4)];
402 dst[offset + x + 5 * stride] = cm[dst[offset + x + 5 * stride] + ((d * 3) >> 4)];
403 dst[offset + x + 4 * stride] = cm[dst[offset + x + 4 * stride] + ((d * 1) >> 4)];
406 dst[offset + x + 8 * stride] = cm[dst[offset + x + 8 * stride] - ((d * 7) >> 4)];
407 dst[offset + x + 9 * stride] = cm[dst[offset + x + 9 * stride] - ((d * 5) >> 4)];
408 dst[offset + x + 10 * stride] = cm[dst[offset + x + 10 * stride] - ((d * 3) >> 4)];
409 dst[offset + x + 11 * stride] = cm[dst[offset + x + 11 * stride] - ((d * 1) >> 4)];
416 static void guess_mv(MpegEncContext *s)
418 uint8_t *fixed = s->er_temp_buffer;
421 #define MV_UNCHANGED 1
422 const int mb_stride = s->mb_stride;
423 const int mb_width = s->mb_width;
424 const int mb_height = s->mb_height;
425 int i, depth, num_avail;
426 int mb_x, mb_y, mot_step, mot_stride;
428 set_mv_strides(s, &mot_step, &mot_stride);
431 for (i = 0; i < s->mb_num; i++) {
432 const int mb_xy = s->mb_index2xy[i];
434 int error = s->error_status_table[mb_xy];
436 if (IS_INTRA(s->current_picture.f.mb_type[mb_xy]))
437 f = MV_FROZEN; // intra // FIXME check
438 if (!(error & ER_MV_ERROR))
439 f = MV_FROZEN; // inter with undamaged MV
444 else if(s->last_picture.f.data[0] && s->last_picture.f.motion_val[0]){
445 const int mb_y= mb_xy / s->mb_stride;
446 const int mb_x= mb_xy % s->mb_stride;
447 const int mot_index= (mb_x + mb_y*mot_stride) * mot_step;
448 s->current_picture.f.motion_val[0][mot_index][0]= s->last_picture.f.motion_val[0][mot_index][0];
449 s->current_picture.f.motion_val[0][mot_index][1]= s->last_picture.f.motion_val[0][mot_index][1];
450 s->current_picture.f.ref_index[0][4*mb_xy] = s->last_picture.f.ref_index[0][4*mb_xy];
454 if ((!(s->avctx->error_concealment&FF_EC_GUESS_MVS)) ||
455 num_avail <= mb_width / 2) {
456 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
457 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
458 const int mb_xy = mb_x + mb_y * s->mb_stride;
460 if (IS_INTRA(s->current_picture.f.mb_type[mb_xy]))
462 if (!(s->error_status_table[mb_xy] & ER_MV_ERROR))
465 s->mv_dir = s->last_picture.f.data[0] ? MV_DIR_FORWARD
468 s->mv_type = MV_TYPE_16X16;
471 s->dsp.clear_blocks(s->block[0]);
483 for (depth = 0; ; depth++) {
484 int changed, pass, none_left;
488 for (pass = 0; (changed || pass < 2) && pass < 10; pass++) {
493 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
494 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
495 const int mb_xy = mb_x + mb_y * s->mb_stride;
496 int mv_predictor[8][2] = { { 0 } };
500 int best_score = 256 * 256 * 256 * 64;
502 const int mot_index = (mb_x + mb_y * mot_stride) * mot_step;
503 int prev_x, prev_y, prev_ref;
505 if ((mb_x ^ mb_y ^ pass) & 1)
508 if (fixed[mb_xy] == MV_FROZEN)
510 av_assert1(!IS_INTRA(s->current_picture.f.mb_type[mb_xy]));
511 av_assert1(s->last_picture_ptr && s->last_picture_ptr->f.data[0]);
514 if (mb_x > 0 && fixed[mb_xy - 1] == MV_FROZEN)
516 if (mb_x + 1 < mb_width && fixed[mb_xy + 1] == MV_FROZEN)
518 if (mb_y > 0 && fixed[mb_xy - mb_stride] == MV_FROZEN)
520 if (mb_y + 1 < mb_height && fixed[mb_xy + mb_stride] == MV_FROZEN)
526 if (mb_x > 0 && fixed[mb_xy - 1 ] == MV_CHANGED)
528 if (mb_x + 1 < mb_width && fixed[mb_xy + 1 ] == MV_CHANGED)
530 if (mb_y > 0 && fixed[mb_xy - mb_stride] == MV_CHANGED)
532 if (mb_y + 1 < mb_height && fixed[mb_xy + mb_stride] == MV_CHANGED)
534 if (j == 0 && pass > 1)
539 if (mb_x > 0 && fixed[mb_xy - 1]) {
540 mv_predictor[pred_count][0] =
541 s->current_picture.f.motion_val[0][mot_index - mot_step][0];
542 mv_predictor[pred_count][1] =
543 s->current_picture.f.motion_val[0][mot_index - mot_step][1];
545 s->current_picture.f.ref_index[0][4 * (mb_xy - 1)];
548 if (mb_x + 1 < mb_width && fixed[mb_xy + 1]) {
549 mv_predictor[pred_count][0] =
550 s->current_picture.f.motion_val[0][mot_index + mot_step][0];
551 mv_predictor[pred_count][1] =
552 s->current_picture.f.motion_val[0][mot_index + mot_step][1];
554 s->current_picture.f.ref_index[0][4 * (mb_xy + 1)];
557 if (mb_y > 0 && fixed[mb_xy - mb_stride]) {
558 mv_predictor[pred_count][0] =
559 s->current_picture.f.motion_val[0][mot_index - mot_stride * mot_step][0];
560 mv_predictor[pred_count][1] =
561 s->current_picture.f.motion_val[0][mot_index - mot_stride * mot_step][1];
563 s->current_picture.f.ref_index[0][4 * (mb_xy - s->mb_stride)];
566 if (mb_y + 1<mb_height && fixed[mb_xy + mb_stride]) {
567 mv_predictor[pred_count][0] =
568 s->current_picture.f.motion_val[0][mot_index + mot_stride * mot_step][0];
569 mv_predictor[pred_count][1] =
570 s->current_picture.f.motion_val[0][mot_index + mot_stride * mot_step][1];
572 s->current_picture.f.ref_index[0][4 * (mb_xy + s->mb_stride)];
578 if (pred_count > 1) {
579 int sum_x = 0, sum_y = 0, sum_r = 0;
580 int max_x, max_y, min_x, min_y, max_r, min_r;
582 for (j = 0; j < pred_count; j++) {
583 sum_x += mv_predictor[j][0];
584 sum_y += mv_predictor[j][1];
586 if (j && ref[j] != ref[j - 1])
587 goto skip_mean_and_median;
591 mv_predictor[pred_count][0] = sum_x / j;
592 mv_predictor[pred_count][1] = sum_y / j;
593 ref[pred_count] = sum_r / j;
596 if (pred_count >= 3) {
597 min_y = min_x = min_r = 99999;
598 max_y = max_x = max_r = -99999;
600 min_x = min_y = max_x = max_y = min_r = max_r = 0;
602 for (j = 0; j < pred_count; j++) {
603 max_x = FFMAX(max_x, mv_predictor[j][0]);
604 max_y = FFMAX(max_y, mv_predictor[j][1]);
605 max_r = FFMAX(max_r, ref[j]);
606 min_x = FFMIN(min_x, mv_predictor[j][0]);
607 min_y = FFMIN(min_y, mv_predictor[j][1]);
608 min_r = FFMIN(min_r, ref[j]);
610 mv_predictor[pred_count + 1][0] = sum_x - max_x - min_x;
611 mv_predictor[pred_count + 1][1] = sum_y - max_y - min_y;
612 ref[pred_count + 1] = sum_r - max_r - min_r;
614 if (pred_count == 4) {
615 mv_predictor[pred_count + 1][0] /= 2;
616 mv_predictor[pred_count + 1][1] /= 2;
617 ref[pred_count + 1] /= 2;
622 skip_mean_and_median:
626 if (!fixed[mb_xy] && 0) {
627 if (s->avctx->codec_id == AV_CODEC_ID_H264) {
630 ff_thread_await_progress(&s->last_picture_ptr->f,
633 if (!s->last_picture.f.motion_val[0] ||
634 !s->last_picture.f.ref_index[0])
636 prev_x = s->last_picture.f.motion_val[0][mot_index][0];
637 prev_y = s->last_picture.f.motion_val[0][mot_index][1];
638 prev_ref = s->last_picture.f.ref_index[0][4 * mb_xy];
640 prev_x = s->current_picture.f.motion_val[0][mot_index][0];
641 prev_y = s->current_picture.f.motion_val[0][mot_index][1];
642 prev_ref = s->current_picture.f.ref_index[0][4 * mb_xy];
646 mv_predictor[pred_count][0] = prev_x;
647 mv_predictor[pred_count][1] = prev_y;
648 ref[pred_count] = prev_ref;
652 s->mv_dir = MV_DIR_FORWARD;
654 s->mv_type = MV_TYPE_16X16;
657 s->dsp.clear_blocks(s->block[0]);
662 for (j = 0; j < pred_count; j++) {
664 uint8_t *src = s->current_picture.f.data[0] +
665 mb_x * 16 + mb_y * 16 * s->linesize;
667 s->current_picture.f.motion_val[0][mot_index][0] =
668 s->mv[0][0][0] = mv_predictor[j][0];
669 s->current_picture.f.motion_val[0][mot_index][1] =
670 s->mv[0][0][1] = mv_predictor[j][1];
672 // predictor intra or otherwise not available
676 decode_mb(s, ref[j]);
678 if (mb_x > 0 && fixed[mb_xy - 1]) {
680 for (k = 0; k < 16; k++)
681 score += FFABS(src[k * s->linesize - 1] -
682 src[k * s->linesize]);
684 if (mb_x + 1 < mb_width && fixed[mb_xy + 1]) {
686 for (k = 0; k < 16; k++)
687 score += FFABS(src[k * s->linesize + 15] -
688 src[k * s->linesize + 16]);
690 if (mb_y > 0 && fixed[mb_xy - mb_stride]) {
692 for (k = 0; k < 16; k++)
693 score += FFABS(src[k - s->linesize] - src[k]);
695 if (mb_y + 1 < mb_height && fixed[mb_xy + mb_stride]) {
697 for (k = 0; k < 16; k++)
698 score += FFABS(src[k + s->linesize * 15] -
699 src[k + s->linesize * 16]);
702 if (score <= best_score) { // <= will favor the last MV
707 score_sum += best_score;
708 s->mv[0][0][0] = mv_predictor[best_pred][0];
709 s->mv[0][0][1] = mv_predictor[best_pred][1];
711 for (i = 0; i < mot_step; i++)
712 for (j = 0; j < mot_step; j++) {
713 s->current_picture.f.motion_val[0][mot_index + i + j * mot_stride][0] = s->mv[0][0][0];
714 s->current_picture.f.motion_val[0][mot_index + i + j * mot_stride][1] = s->mv[0][0][1];
717 decode_mb(s, ref[best_pred]);
720 if (s->mv[0][0][0] != prev_x || s->mv[0][0][1] != prev_y) {
721 fixed[mb_xy] = MV_CHANGED;
724 fixed[mb_xy] = MV_UNCHANGED;
728 // printf(".%d/%d", changed, score_sum); fflush(stdout);
734 for (i = 0; i < s->mb_num; i++) {
735 int mb_xy = s->mb_index2xy[i];
737 fixed[mb_xy] = MV_FROZEN;
739 // printf(":"); fflush(stdout);
743 static int is_intra_more_likely(MpegEncContext *s)
745 int is_intra_likely, i, j, undamaged_count, skip_amount, mb_x, mb_y;
747 if (!s->last_picture_ptr || !s->last_picture_ptr->f.data[0])
748 return 1; // no previous frame available -> use spatial prediction
751 for (i = 0; i < s->mb_num; i++) {
752 const int mb_xy = s->mb_index2xy[i];
753 const int error = s->error_status_table[mb_xy];
754 if (!((error & ER_DC_ERROR) && (error & ER_MV_ERROR)))
758 if (s->codec_id == AV_CODEC_ID_H264) {
759 H264Context *h = (void*) s;
760 if (h->list_count <= 0 || h->ref_count[0] <= 0 ||
761 !h->ref_list[0][0].f.data[0])
765 if (undamaged_count < 5)
766 return 0; // almost all MBs damaged -> use temporal prediction
768 // prevent dsp.sad() check, that requires access to the image
769 if (CONFIG_MPEG_XVMC_DECODER &&
770 s->avctx->xvmc_acceleration &&
771 s->pict_type == AV_PICTURE_TYPE_I)
774 skip_amount = FFMAX(undamaged_count / 50, 1); // check only up to 50 MBs
778 for (mb_y = 0; mb_y < s->mb_height - 1; mb_y++) {
779 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
781 const int mb_xy = mb_x + mb_y * s->mb_stride;
783 error = s->error_status_table[mb_xy];
784 if ((error & ER_DC_ERROR) && (error & ER_MV_ERROR))
785 continue; // skip damaged
788 // skip a few to speed things up
789 if ((j % skip_amount) != 0)
792 if (s->pict_type == AV_PICTURE_TYPE_I) {
793 uint8_t *mb_ptr = s->current_picture.f.data[0] +
794 mb_x * 16 + mb_y * 16 * s->linesize;
795 uint8_t *last_mb_ptr = s->last_picture.f.data[0] +
796 mb_x * 16 + mb_y * 16 * s->linesize;
798 if (s->avctx->codec_id == AV_CODEC_ID_H264) {
801 ff_thread_await_progress(&s->last_picture_ptr->f,
804 is_intra_likely += s->dsp.sad[0](NULL, last_mb_ptr, mb_ptr , s->linesize, 16);
805 // FIXME need await_progress() here
806 is_intra_likely -= s->dsp.sad[0](NULL, last_mb_ptr, last_mb_ptr+s->linesize*16, s->linesize, 16);
808 if (IS_INTRA(s->current_picture.f.mb_type[mb_xy]))
815 // printf("is_intra_likely: %d type:%d\n", is_intra_likely, s->pict_type);
816 return is_intra_likely > 0;
819 void ff_er_frame_start(MpegEncContext *s)
821 if (!s->err_recognition)
824 memset(s->error_status_table, ER_MB_ERROR | VP_START | ER_MB_END,
825 s->mb_stride * s->mb_height * sizeof(uint8_t));
826 s->error_count = 3 * s->mb_num;
827 s->error_occurred = 0;
832 * @param endx x component of the last macroblock, can be -1
833 * for the last of the previous line
834 * @param status the status at the end (ER_MV_END, ER_AC_ERROR, ...), it is
835 * assumed that no earlier end or error of the same type occurred
837 void ff_er_add_slice(MpegEncContext *s, int startx, int starty,
838 int endx, int endy, int status)
840 const int start_i = av_clip(startx + starty * s->mb_width, 0, s->mb_num - 1);
841 const int end_i = av_clip(endx + endy * s->mb_width, 0, s->mb_num);
842 const int start_xy = s->mb_index2xy[start_i];
843 const int end_xy = s->mb_index2xy[end_i];
846 if (s->avctx->hwaccel)
849 if (start_i > end_i || start_xy > end_xy) {
850 av_log(s->avctx, AV_LOG_ERROR,
851 "internal error, slice end before start\n");
855 if (!s->err_recognition)
859 if (status & (ER_AC_ERROR | ER_AC_END)) {
860 mask &= ~(ER_AC_ERROR | ER_AC_END);
861 s->error_count -= end_i - start_i + 1;
863 if (status & (ER_DC_ERROR | ER_DC_END)) {
864 mask &= ~(ER_DC_ERROR | ER_DC_END);
865 s->error_count -= end_i - start_i + 1;
867 if (status & (ER_MV_ERROR | ER_MV_END)) {
868 mask &= ~(ER_MV_ERROR | ER_MV_END);
869 s->error_count -= end_i - start_i + 1;
872 if (status & ER_MB_ERROR) {
873 s->error_occurred = 1;
874 s->error_count = INT_MAX;
878 memset(&s->error_status_table[start_xy], 0,
879 (end_xy - start_xy) * sizeof(uint8_t));
882 for (i = start_xy; i < end_xy; i++)
883 s->error_status_table[i] &= mask;
886 if (end_i == s->mb_num)
887 s->error_count = INT_MAX;
889 s->error_status_table[end_xy] &= mask;
890 s->error_status_table[end_xy] |= status;
893 s->error_status_table[start_xy] |= VP_START;
895 if (start_xy > 0 && s->avctx->thread_count <= 1 &&
896 s->avctx->skip_top * s->mb_width < start_i) {
897 int prev_status = s->error_status_table[s->mb_index2xy[start_i - 1]];
899 prev_status &= ~ VP_START;
900 if (prev_status != (ER_MV_END | ER_DC_END | ER_AC_END))
901 s->error_count = INT_MAX;
905 void ff_er_frame_end(MpegEncContext *s)
907 int i, mb_x, mb_y, error, error_type, dc_error, mv_error, ac_error;
909 int threshold_part[4] = { 100, 100, 100 };
912 int size = s->b8_stride * 2 * s->mb_height;
913 Picture *pic = s->current_picture_ptr;
915 /* We do not support ER of field pictures yet,
916 * though it should not crash if enabled. */
917 if (!s->err_recognition || s->error_count == 0 || s->avctx->lowres ||
919 s->avctx->codec->capabilities&CODEC_CAP_HWACCEL_VDPAU ||
920 s->picture_structure != PICT_FRAME ||
921 s->error_count == 3 * s->mb_width *
922 (s->avctx->skip_top + s->avctx->skip_bottom)) {
926 if (s->current_picture.f.motion_val[0] == NULL) {
927 av_log(s->avctx, AV_LOG_ERROR, "Warning MVs not available\n");
929 for (i = 0; i < 2; i++) {
930 pic->f.ref_index[i] = av_mallocz(s->mb_stride * s->mb_height * 4 * sizeof(uint8_t));
931 pic->motion_val_base[i] = av_mallocz((size + 4) * 2 * sizeof(uint16_t));
932 pic->f.motion_val[i] = pic->motion_val_base[i] + 4;
934 pic->f.motion_subsample_log2 = 3;
935 s->current_picture = *s->current_picture_ptr;
938 if (s->avctx->debug & FF_DEBUG_ER) {
939 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
940 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
941 int status = s->error_status_table[mb_x + mb_y * s->mb_stride];
943 av_log(s->avctx, AV_LOG_DEBUG, "%2X ", status);
945 av_log(s->avctx, AV_LOG_DEBUG, "\n");
950 /* handle overlapping slices */
951 for (error_type = 1; error_type <= 3; error_type++) {
954 for (i = s->mb_num - 1; i >= 0; i--) {
955 const int mb_xy = s->mb_index2xy[i];
956 int error = s->error_status_table[mb_xy];
958 if (error & (1 << error_type))
960 if (error & (8 << error_type))
964 s->error_status_table[mb_xy] |= 1 << error_type;
966 if (error & VP_START)
972 /* handle slices with partitions of different length */
973 if (s->partitioned_frame) {
976 for (i = s->mb_num - 1; i >= 0; i--) {
977 const int mb_xy = s->mb_index2xy[i];
978 int error = s->error_status_table[mb_xy];
980 if (error & ER_AC_END)
982 if ((error & ER_MV_END) ||
983 (error & ER_DC_END) ||
984 (error & ER_AC_ERROR))
988 s->error_status_table[mb_xy]|= ER_AC_ERROR;
990 if (error & VP_START)
995 /* handle missing slices */
996 if (s->err_recognition & AV_EF_EXPLODE) {
1000 for (i = s->mb_num - 2; i >= s->mb_width + 100; i--) {
1001 const int mb_xy = s->mb_index2xy[i];
1002 int error1 = s->error_status_table[mb_xy];
1003 int error2 = s->error_status_table[s->mb_index2xy[i + 1]];
1005 if (error1 & VP_START)
1008 if (error2 == (VP_START | ER_MB_ERROR | ER_MB_END) &&
1009 error1 != (VP_START | ER_MB_ERROR | ER_MB_END) &&
1010 ((error1 & ER_AC_END) || (error1 & ER_DC_END) ||
1011 (error1 & ER_MV_END))) {
1017 s->error_status_table[mb_xy] |= ER_MB_ERROR;
1022 /* backward mark errors */
1024 for (error_type = 1; error_type <= 3; error_type++) {
1025 for (i = s->mb_num - 1; i >= 0; i--) {
1026 const int mb_xy = s->mb_index2xy[i];
1027 int error = s->error_status_table[mb_xy];
1029 if (!s->mbskip_table[mb_xy]) // FIXME partition specific
1031 if (error & (1 << error_type))
1034 if (s->partitioned_frame) {
1035 if (distance < threshold_part[error_type - 1])
1036 s->error_status_table[mb_xy] |= 1 << error_type;
1038 if (distance < threshold)
1039 s->error_status_table[mb_xy] |= 1 << error_type;
1042 if (error & VP_START)
1048 /* forward mark errors */
1050 for (i = 0; i < s->mb_num; i++) {
1051 const int mb_xy = s->mb_index2xy[i];
1052 int old_error = s->error_status_table[mb_xy];
1054 if (old_error & VP_START) {
1055 error = old_error & ER_MB_ERROR;
1057 error |= old_error & ER_MB_ERROR;
1058 s->error_status_table[mb_xy] |= error;
1062 /* handle not partitioned case */
1063 if (!s->partitioned_frame) {
1064 for (i = 0; i < s->mb_num; i++) {
1065 const int mb_xy = s->mb_index2xy[i];
1066 error = s->error_status_table[mb_xy];
1067 if (error & ER_MB_ERROR)
1068 error |= ER_MB_ERROR;
1069 s->error_status_table[mb_xy] = error;
1074 dc_error = ac_error = mv_error = 0;
1075 for (i = 0; i < s->mb_num; i++) {
1076 const int mb_xy = s->mb_index2xy[i];
1077 error = s->error_status_table[mb_xy];
1078 if (error & ER_DC_ERROR)
1080 if (error & ER_AC_ERROR)
1082 if (error & ER_MV_ERROR)
1085 av_log(s->avctx, AV_LOG_INFO, "concealing %d DC, %d AC, %d MV errors in %c frame\n",
1086 dc_error, ac_error, mv_error, av_get_picture_type_char(s->pict_type));
1088 is_intra_likely = is_intra_more_likely(s);
1090 /* set unknown mb-type to most likely */
1091 for (i = 0; i < s->mb_num; i++) {
1092 const int mb_xy = s->mb_index2xy[i];
1093 error = s->error_status_table[mb_xy];
1094 if (!((error & ER_DC_ERROR) && (error & ER_MV_ERROR)))
1097 if (is_intra_likely)
1098 s->current_picture.f.mb_type[mb_xy] = MB_TYPE_INTRA4x4;
1100 s->current_picture.f.mb_type[mb_xy] = MB_TYPE_16x16 | MB_TYPE_L0;
1103 // change inter to intra blocks if no reference frames are available
1104 if (!s->last_picture.f.data[0] && !s->next_picture.f.data[0])
1105 for (i = 0; i < s->mb_num; i++) {
1106 const int mb_xy = s->mb_index2xy[i];
1107 if (!IS_INTRA(s->current_picture.f.mb_type[mb_xy]))
1108 s->current_picture.f.mb_type[mb_xy] = MB_TYPE_INTRA4x4;
1111 /* handle inter blocks with damaged AC */
1112 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1113 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1114 const int mb_xy = mb_x + mb_y * s->mb_stride;
1115 const int mb_type = s->current_picture.f.mb_type[mb_xy];
1116 int dir = !s->last_picture.f.data[0];
1118 error = s->error_status_table[mb_xy];
1120 if (IS_INTRA(mb_type))
1122 if (error & ER_MV_ERROR)
1123 continue; // inter with damaged MV
1124 if (!(error & ER_AC_ERROR))
1125 continue; // undamaged inter
1127 s->mv_dir = dir ? MV_DIR_BACKWARD : MV_DIR_FORWARD;
1130 if (IS_8X8(mb_type)) {
1131 int mb_index = mb_x * 2 + mb_y * 2 * s->b8_stride;
1133 s->mv_type = MV_TYPE_8X8;
1134 for (j = 0; j < 4; j++) {
1135 s->mv[0][j][0] = s->current_picture.f.motion_val[dir][mb_index + (j & 1) + (j >> 1) * s->b8_stride][0];
1136 s->mv[0][j][1] = s->current_picture.f.motion_val[dir][mb_index + (j & 1) + (j >> 1) * s->b8_stride][1];
1139 s->mv_type = MV_TYPE_16X16;
1140 s->mv[0][0][0] = s->current_picture.f.motion_val[dir][mb_x * 2 + mb_y * 2 * s->b8_stride][0];
1141 s->mv[0][0][1] = s->current_picture.f.motion_val[dir][mb_x * 2 + mb_y * 2 * s->b8_stride][1];
1144 s->dsp.clear_blocks(s->block[0]);
1148 decode_mb(s, 0 /* FIXME h264 partitioned slices need this set */);
1153 if (s->pict_type == AV_PICTURE_TYPE_B) {
1154 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1155 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1156 int xy = mb_x * 2 + mb_y * 2 * s->b8_stride;
1157 const int mb_xy = mb_x + mb_y * s->mb_stride;
1158 const int mb_type = s->current_picture.f.mb_type[mb_xy];
1160 error = s->error_status_table[mb_xy];
1162 if (IS_INTRA(mb_type))
1164 if (!(error & ER_MV_ERROR))
1165 continue; // inter with undamaged MV
1166 if (!(error & ER_AC_ERROR))
1167 continue; // undamaged inter
1169 s->mv_dir = MV_DIR_FORWARD | MV_DIR_BACKWARD;
1170 if (!s->last_picture.f.data[0])
1171 s->mv_dir &= ~MV_DIR_FORWARD;
1172 if (!s->next_picture.f.data[0])
1173 s->mv_dir &= ~MV_DIR_BACKWARD;
1175 s->mv_type = MV_TYPE_16X16;
1179 int time_pp = s->pp_time;
1180 int time_pb = s->pb_time;
1182 if (s->avctx->codec_id == AV_CODEC_ID_H264) {
1185 ff_thread_await_progress(&s->next_picture_ptr->f, mb_y, 0);
1187 s->mv[0][0][0] = s->next_picture.f.motion_val[0][xy][0] * time_pb / time_pp;
1188 s->mv[0][0][1] = s->next_picture.f.motion_val[0][xy][1] * time_pb / time_pp;
1189 s->mv[1][0][0] = s->next_picture.f.motion_val[0][xy][0] * (time_pb - time_pp) / time_pp;
1190 s->mv[1][0][1] = s->next_picture.f.motion_val[0][xy][1] * (time_pb - time_pp) / time_pp;
1198 s->dsp.clear_blocks(s->block[0]);
1207 /* the filters below are not XvMC compatible, skip them */
1208 if (CONFIG_MPEG_XVMC_DECODER && s->avctx->xvmc_acceleration)
1210 /* fill DC for inter blocks */
1211 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1212 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1213 int dc, dcu, dcv, y, n;
1215 uint8_t *dest_y, *dest_cb, *dest_cr;
1216 const int mb_xy = mb_x + mb_y * s->mb_stride;
1217 const int mb_type = s->current_picture.f.mb_type[mb_xy];
1219 error = s->error_status_table[mb_xy];
1221 if (IS_INTRA(mb_type) && s->partitioned_frame)
1223 // if (error & ER_MV_ERROR)
1224 // continue; // inter data damaged FIXME is this good?
1226 dest_y = s->current_picture.f.data[0] + mb_x * 16 + mb_y * 16 * s->linesize;
1227 dest_cb = s->current_picture.f.data[1] + mb_x * 8 + mb_y * 8 * s->uvlinesize;
1228 dest_cr = s->current_picture.f.data[2] + mb_x * 8 + mb_y * 8 * s->uvlinesize;
1230 dc_ptr = &s->dc_val[0][mb_x * 2 + mb_y * 2 * s->b8_stride];
1231 for (n = 0; n < 4; n++) {
1233 for (y = 0; y < 8; y++) {
1235 for (x = 0; x < 8; x++)
1236 dc += dest_y[x + (n & 1) * 8 +
1237 (y + (n >> 1) * 8) * s->linesize];
1239 dc_ptr[(n & 1) + (n >> 1) * s->b8_stride] = (dc + 4) >> 3;
1243 for (y = 0; y < 8; y++) {
1245 for (x = 0; x < 8; x++) {
1246 dcu += dest_cb[x + y * s->uvlinesize];
1247 dcv += dest_cr[x + y * s->uvlinesize];
1250 s->dc_val[1][mb_x + mb_y * s->mb_stride] = (dcu + 4) >> 3;
1251 s->dc_val[2][mb_x + mb_y * s->mb_stride] = (dcv + 4) >> 3;
1255 /* guess DC for damaged blocks */
1256 guess_dc(s, s->dc_val[0], s->mb_width*2, s->mb_height*2, s->b8_stride, 1);
1257 guess_dc(s, s->dc_val[1], s->mb_width , s->mb_height , s->mb_stride, 0);
1258 guess_dc(s, s->dc_val[2], s->mb_width , s->mb_height , s->mb_stride, 0);
1261 /* filter luma DC */
1262 filter181(s->dc_val[0], s->mb_width * 2, s->mb_height * 2, s->b8_stride);
1265 /* render DC only intra */
1266 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1267 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1268 uint8_t *dest_y, *dest_cb, *dest_cr;
1269 const int mb_xy = mb_x + mb_y * s->mb_stride;
1270 const int mb_type = s->current_picture.f.mb_type[mb_xy];
1272 error = s->error_status_table[mb_xy];
1274 if (IS_INTER(mb_type))
1276 if (!(error & ER_AC_ERROR))
1277 continue; // undamaged
1279 dest_y = s->current_picture.f.data[0] + mb_x * 16 + mb_y * 16 * s->linesize;
1280 dest_cb = s->current_picture.f.data[1] + mb_x * 8 + mb_y * 8 * s->uvlinesize;
1281 dest_cr = s->current_picture.f.data[2] + mb_x * 8 + mb_y * 8 * s->uvlinesize;
1283 put_dc(s, dest_y, dest_cb, dest_cr, mb_x, mb_y);
1288 if (s->avctx->error_concealment & FF_EC_DEBLOCK) {
1289 /* filter horizontal block boundaries */
1290 h_block_filter(s, s->current_picture.f.data[0], s->mb_width * 2,
1291 s->mb_height * 2, s->linesize, 1);
1292 h_block_filter(s, s->current_picture.f.data[1], s->mb_width,
1293 s->mb_height , s->uvlinesize, 0);
1294 h_block_filter(s, s->current_picture.f.data[2], s->mb_width,
1295 s->mb_height , s->uvlinesize, 0);
1297 /* filter vertical block boundaries */
1298 v_block_filter(s, s->current_picture.f.data[0], s->mb_width * 2,
1299 s->mb_height * 2, s->linesize, 1);
1300 v_block_filter(s, s->current_picture.f.data[1], s->mb_width,
1301 s->mb_height , s->uvlinesize, 0);
1302 v_block_filter(s, s->current_picture.f.data[2], s->mb_width,
1303 s->mb_height , s->uvlinesize, 0);
1307 /* clean a few tables */
1308 for (i = 0; i < s->mb_num; i++) {
1309 const int mb_xy = s->mb_index2xy[i];
1310 int error = s->error_status_table[mb_xy];
1312 if (s->pict_type != AV_PICTURE_TYPE_B &&
1313 (error & (ER_DC_ERROR | ER_MV_ERROR | ER_AC_ERROR))) {
1314 s->mbskip_table[mb_xy] = 0;
1316 s->mbintra_table[mb_xy] = 1;