--- /dev/null
+/*
+ * Error resilience / concealment
+ *
+ * Copyright (c) 2002 Michael Niedermayer <michaelni@gmx.at>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+/**
+ * @file error_resilience.c
+ * Error resilience / concealment.
+ */
+
+#include <limits.h>
+
+#include "avcodec.h"
+#include "dsputil.h"
+#include "mpegvideo.h"
+#include "common.h"
+
+static void decode_mb(MpegEncContext *s){
+ s->dest[0] = s->current_picture.data[0] + (s->mb_y * 16* s->linesize ) + s->mb_x * 16;
+ s->dest[1] = s->current_picture.data[1] + (s->mb_y * 8 * s->uvlinesize) + s->mb_x * 8;
+ s->dest[2] = s->current_picture.data[2] + (s->mb_y * 8 * s->uvlinesize) + s->mb_x * 8;
+
+ MPV_decode_mb(s, s->block);
+}
+
+/**
+ * replaces the current MB with a flat dc only version.
+ */
+static void put_dc(MpegEncContext *s, uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr, int mb_x, int mb_y)
+{
+ int dc, dcu, dcv, y, i;
+ for(i=0; i<4; i++){
+ dc= s->dc_val[0][mb_x*2+1 + (i&1) + (mb_y*2+1 + (i>>1))*(s->mb_width*2+2)];
+ if(dc<0) dc=0;
+ else if(dc>2040) dc=2040;
+ for(y=0; y<8; y++){
+ int x;
+ for(x=0; x<8; x++){
+ dest_y[x + (i&1)*8 + (y + (i>>1)*8)*s->linesize]= dc/8;
+ }
+ }
+ }
+ dcu = s->dc_val[1][mb_x+1 + (mb_y+1)*(s->mb_width+2)];
+ dcv = s->dc_val[2][mb_x+1 + (mb_y+1)*(s->mb_width+2)];
+ if (dcu<0 ) dcu=0;
+ else if(dcu>2040) dcu=2040;
+ if (dcv<0 ) dcv=0;
+ else if(dcv>2040) dcv=2040;
+ for(y=0; y<8; y++){
+ int x;
+ for(x=0; x<8; x++){
+ dest_cb[x + y*(s->uvlinesize)]= dcu/8;
+ dest_cr[x + y*(s->uvlinesize)]= dcv/8;
+ }
+ }
+}
+
+static void filter181(int16_t *data, int width, int height, int stride){
+ int x,y;
+
+ /* horizontal filter */
+ for(y=1; y<height-1; y++){
+ int prev_dc= data[0 + y*stride];
+
+ for(x=1; x<width-1; x++){
+ int dc;
+
+ dc= - prev_dc
+ + data[x + y*stride]*8
+ - data[x + 1 + y*stride];
+ dc= (dc*10923 + 32768)>>16;
+ prev_dc= data[x + y*stride];
+ data[x + y*stride]= dc;
+ }
+ }
+
+ /* vertical filter */
+ for(x=1; x<width-1; x++){
+ int prev_dc= data[x];
+
+ for(y=1; y<height-1; y++){
+ int dc;
+
+ dc= - prev_dc
+ + data[x + y *stride]*8
+ - data[x + (y+1)*stride];
+ dc= (dc*10923 + 32768)>>16;
+ prev_dc= data[x + y*stride];
+ data[x + y*stride]= dc;
+ }
+ }
+}
+
+/**
+ * guess the dc of blocks which dont have a undamaged dc
+ * @param w width in 8 pixel blocks
+ * @param h height in 8 pixel blocks
+ */
+static void guess_dc(MpegEncContext *s, int16_t *dc, int w, int h, int stride, int is_luma){
+ int b_x, b_y;
+
+ for(b_y=0; b_y<h; b_y++){
+ for(b_x=0; b_x<w; b_x++){
+ int color[4]={1024,1024,1024,1024};
+ int distance[4]={9999,9999,9999,9999};
+ int mb_index, error, j;
+ int64_t guess, weight_sum;
+
+ mb_index= (b_x>>is_luma) + (b_y>>is_luma)*s->mb_stride;
+
+ error= s->error_status_table[mb_index];
+
+ if(IS_INTER(s->current_picture.mb_type[mb_index])) continue; //inter
+ if(!(error&DC_ERROR)) continue; //dc-ok
+
+ /* right block */
+ for(j=b_x+1; j<w; j++){
+ int mb_index_j= (j>>is_luma) + (b_y>>is_luma)*s->mb_stride;
+ int error_j= s->error_status_table[mb_index_j];
+ int intra_j= IS_INTRA(s->current_picture.mb_type[mb_index_j]);
+ if(intra_j==0 || !(error_j&DC_ERROR)){
+ color[0]= dc[j + b_y*stride];
+ distance[0]= j-b_x;
+ break;
+ }
+ }
+
+ /* left block */
+ for(j=b_x-1; j>=0; j--){
+ int mb_index_j= (j>>is_luma) + (b_y>>is_luma)*s->mb_stride;
+ int error_j= s->error_status_table[mb_index_j];
+ int intra_j= IS_INTRA(s->current_picture.mb_type[mb_index_j]);
+ if(intra_j==0 || !(error_j&DC_ERROR)){
+ color[1]= dc[j + b_y*stride];
+ distance[1]= b_x-j;
+ break;
+ }
+ }
+
+ /* bottom block */
+ for(j=b_y+1; j<h; j++){
+ int mb_index_j= (b_x>>is_luma) + (j>>is_luma)*s->mb_stride;
+ int error_j= s->error_status_table[mb_index_j];
+ int intra_j= IS_INTRA(s->current_picture.mb_type[mb_index_j]);
+ if(intra_j==0 || !(error_j&DC_ERROR)){
+ color[2]= dc[b_x + j*stride];
+ distance[2]= j-b_y;
+ break;
+ }
+ }
+
+ /* top block */
+ for(j=b_y-1; j>=0; j--){
+ int mb_index_j= (b_x>>is_luma) + (j>>is_luma)*s->mb_stride;
+ int error_j= s->error_status_table[mb_index_j];
+ int intra_j= IS_INTRA(s->current_picture.mb_type[mb_index_j]);
+ if(intra_j==0 || !(error_j&DC_ERROR)){
+ color[3]= dc[b_x + j*stride];
+ distance[3]= b_y-j;
+ break;
+ }
+ }
+
+ weight_sum=0;
+ guess=0;
+ for(j=0; j<4; j++){
+ int64_t weight= 256*256*256*16/distance[j];
+ guess+= weight*(int64_t)color[j];
+ weight_sum+= weight;
+ }
+ guess= (guess + weight_sum/2) / weight_sum;
+
+ dc[b_x + b_y*stride]= guess;
+ }
+ }
+}
+
+/**
+ * simple horizontal deblocking filter used for error resilience
+ * @param w width in 8 pixel blocks
+ * @param h height in 8 pixel blocks
+ */
+static void h_block_filter(MpegEncContext *s, uint8_t *dst, int w, int h, int stride, int is_luma){
+ int b_x, b_y;
+ uint8_t *cm = cropTbl + MAX_NEG_CROP;
+
+ for(b_y=0; b_y<h; b_y++){
+ for(b_x=0; b_x<w-1; b_x++){
+ int y;
+ int left_status = s->error_status_table[( b_x >>is_luma) + (b_y>>is_luma)*s->mb_stride];
+ int right_status= s->error_status_table[((b_x+1)>>is_luma) + (b_y>>is_luma)*s->mb_stride];
+ int left_intra= IS_INTRA(s->current_picture.mb_type [( b_x >>is_luma) + (b_y>>is_luma)*s->mb_stride]);
+ int right_intra= IS_INTRA(s->current_picture.mb_type [((b_x+1)>>is_luma) + (b_y>>is_luma)*s->mb_stride]);
+ int left_damage = left_status&(DC_ERROR|AC_ERROR|MV_ERROR);
+ int right_damage= right_status&(DC_ERROR|AC_ERROR|MV_ERROR);
+ int offset= b_x*8 + b_y*stride*8;
+ int16_t *left_mv= s->motion_val[s->block_wrap[0]*((b_y<<(1-is_luma)) + 1) + ( b_x <<(1-is_luma))];
+ int16_t *right_mv= s->motion_val[s->block_wrap[0]*((b_y<<(1-is_luma)) + 1) + ((b_x+1)<<(1-is_luma))];
+
+ if(!(left_damage||right_damage)) continue; // both undamaged
+
+ if( (!left_intra) && (!right_intra)
+ && ABS(left_mv[0]-right_mv[0]) + ABS(left_mv[1]+right_mv[1]) < 2) continue;
+
+ for(y=0; y<8; y++){
+ int a,b,c,d;
+
+ a= dst[offset + 7 + y*stride] - dst[offset + 6 + y*stride];
+ b= dst[offset + 8 + y*stride] - dst[offset + 7 + y*stride];
+ c= dst[offset + 9 + y*stride] - dst[offset + 8 + y*stride];
+
+ d= ABS(b) - ((ABS(a) + ABS(c) + 1)>>1);
+ d= FFMAX(d, 0);
+ if(b<0) d= -d;
+
+ if(d==0) continue;
+
+ if(!(left_damage && right_damage))
+ d= d*16/9;
+
+ if(left_damage){
+ dst[offset + 7 + y*stride] = cm[dst[offset + 7 + y*stride] + ((d*7)>>4)];
+ dst[offset + 6 + y*stride] = cm[dst[offset + 6 + y*stride] + ((d*5)>>4)];
+ dst[offset + 5 + y*stride] = cm[dst[offset + 5 + y*stride] + ((d*3)>>4)];
+ dst[offset + 4 + y*stride] = cm[dst[offset + 4 + y*stride] + ((d*1)>>4)];
+ }
+ if(right_damage){
+ dst[offset + 8 + y*stride] = cm[dst[offset + 8 + y*stride] - ((d*7)>>4)];
+ dst[offset + 9 + y*stride] = cm[dst[offset + 9 + y*stride] - ((d*5)>>4)];
+ dst[offset + 10+ y*stride] = cm[dst[offset +10 + y*stride] - ((d*3)>>4)];
+ dst[offset + 11+ y*stride] = cm[dst[offset +11 + y*stride] - ((d*1)>>4)];
+ }
+ }
+ }
+ }
+}
+
+/**
+ * simple vertical deblocking filter used for error resilience
+ * @param w width in 8 pixel blocks
+ * @param h height in 8 pixel blocks
+ */
+static void v_block_filter(MpegEncContext *s, uint8_t *dst, int w, int h, int stride, int is_luma){
+ int b_x, b_y;
+ uint8_t *cm = cropTbl + MAX_NEG_CROP;
+
+ for(b_y=0; b_y<h-1; b_y++){
+ for(b_x=0; b_x<w; b_x++){
+ int x;
+ int top_status = s->error_status_table[(b_x>>is_luma) + ( b_y >>is_luma)*s->mb_stride];
+ int bottom_status= s->error_status_table[(b_x>>is_luma) + ((b_y+1)>>is_luma)*s->mb_stride];
+ int top_intra= IS_INTRA(s->current_picture.mb_type [(b_x>>is_luma) + ( b_y >>is_luma)*s->mb_stride]);
+ int bottom_intra= IS_INTRA(s->current_picture.mb_type [(b_x>>is_luma) + ((b_y+1)>>is_luma)*s->mb_stride]);
+ int top_damage = top_status&(DC_ERROR|AC_ERROR|MV_ERROR);
+ int bottom_damage= bottom_status&(DC_ERROR|AC_ERROR|MV_ERROR);
+ int offset= b_x*8 + b_y*stride*8;
+ int16_t *top_mv= s->motion_val[s->block_wrap[0]*(( b_y <<(1-is_luma)) + 1) + (b_x<<(1-is_luma))];
+ int16_t *bottom_mv= s->motion_val[s->block_wrap[0]*(((b_y+1)<<(1-is_luma)) + 1) + (b_x<<(1-is_luma))];
+
+ if(!(top_damage||bottom_damage)) continue; // both undamaged
+
+ if( (!top_intra) && (!bottom_intra)
+ && ABS(top_mv[0]-bottom_mv[0]) + ABS(top_mv[1]+bottom_mv[1]) < 2) continue;
+
+ for(x=0; x<8; x++){
+ int a,b,c,d;
+
+ a= dst[offset + x + 7*stride] - dst[offset + x + 6*stride];
+ b= dst[offset + x + 8*stride] - dst[offset + x + 7*stride];
+ c= dst[offset + x + 9*stride] - dst[offset + x + 8*stride];
+
+ d= ABS(b) - ((ABS(a) + ABS(c)+1)>>1);
+ d= FFMAX(d, 0);
+ if(b<0) d= -d;
+
+ if(d==0) continue;
+
+ if(!(top_damage && bottom_damage))
+ d= d*16/9;
+
+ if(top_damage){
+ dst[offset + x + 7*stride] = cm[dst[offset + x + 7*stride] + ((d*7)>>4)];
+ dst[offset + x + 6*stride] = cm[dst[offset + x + 6*stride] + ((d*5)>>4)];
+ dst[offset + x + 5*stride] = cm[dst[offset + x + 5*stride] + ((d*3)>>4)];
+ dst[offset + x + 4*stride] = cm[dst[offset + x + 4*stride] + ((d*1)>>4)];
+ }
+ if(bottom_damage){
+ dst[offset + x + 8*stride] = cm[dst[offset + x + 8*stride] - ((d*7)>>4)];
+ dst[offset + x + 9*stride] = cm[dst[offset + x + 9*stride] - ((d*5)>>4)];
+ dst[offset + x + 10*stride] = cm[dst[offset + x + 10*stride] - ((d*3)>>4)];
+ dst[offset + x + 11*stride] = cm[dst[offset + x + 11*stride] - ((d*1)>>4)];
+ }
+ }
+ }
+ }
+}
+
+static void guess_mv(MpegEncContext *s){
+ uint8_t fixed[s->mb_stride * s->mb_height];
+#define MV_FROZEN 3
+#define MV_CHANGED 2
+#define MV_UNCHANGED 1
+ const int mb_stride = s->mb_stride;
+ const int mb_width = s->mb_width;
+ const int mb_height= s->mb_height;
+ int i, depth, num_avail;
+ int mb_x, mb_y;
+
+ num_avail=0;
+ for(i=0; i<s->mb_num; i++){
+ const int mb_xy= s->mb_index2xy[ i ];
+ int f=0;
+ int error= s->error_status_table[mb_xy];
+
+ if(IS_INTRA(s->current_picture.mb_type[mb_xy])) f=MV_FROZEN; //intra //FIXME check
+ if(!(error&MV_ERROR)) f=MV_FROZEN; //inter with undamaged MV
+
+ fixed[mb_xy]= f;
+ if(f==MV_FROZEN)
+ num_avail++;
+ }
+
+ if((!(s->avctx->error_concealment&FF_EC_GUESS_MVS)) || num_avail <= mb_width/2){
+ for(mb_y=0; mb_y<s->mb_height; mb_y++){
+ for(mb_x=0; mb_x<s->mb_width; mb_x++){
+ const int mb_xy= mb_x + mb_y*s->mb_stride;
+
+ if(IS_INTRA(s->current_picture.mb_type[mb_xy])) continue;
+ if(!(s->error_status_table[mb_xy]&MV_ERROR)) continue;
+
+ s->mv_dir = MV_DIR_FORWARD;
+ s->mb_intra=0;
+ s->mv_type = MV_TYPE_16X16;
+ s->mb_skiped=0;
+
+ s->dsp.clear_blocks(s->block[0]);
+
+ s->mb_x= mb_x;
+ s->mb_y= mb_y;
+ s->mv[0][0][0]= 0;
+ s->mv[0][0][1]= 0;
+ decode_mb(s);
+ }
+ }
+ return;
+ }
+
+ for(depth=0;; depth++){
+ int changed, pass, none_left;
+
+ none_left=1;
+ changed=1;
+ for(pass=0; (changed || pass<2) && pass<10; pass++){
+ int mb_x, mb_y;
+int score_sum=0;
+
+ changed=0;
+ for(mb_y=0; mb_y<s->mb_height; mb_y++){
+ for(mb_x=0; mb_x<s->mb_width; mb_x++){
+ const int mb_xy= mb_x + mb_y*s->mb_stride;
+ int mv_predictor[8][2]={{0}};
+ int pred_count=0;
+ int j;
+ int best_score=256*256*256*64;
+ int best_pred=0;
+ const int mot_stride= mb_width*2+2;
+ const int mot_index= mb_x*2 + 1 + (mb_y*2+1)*mot_stride;
+ int prev_x= s->motion_val[mot_index][0];
+ int prev_y= s->motion_val[mot_index][1];
+
+ if((mb_x^mb_y^pass)&1) continue;
+
+ if(fixed[mb_xy]==MV_FROZEN) continue;
+ assert(!IS_INTRA(s->current_picture.mb_type[mb_xy]));
+ assert(s->last_picture_ptr && s->last_picture_ptr->data[0]);
+
+ j=0;
+ if(mb_x>0 && fixed[mb_xy-1 ]==MV_FROZEN) j=1;
+ if(mb_x+1<mb_width && fixed[mb_xy+1 ]==MV_FROZEN) j=1;
+ if(mb_y>0 && fixed[mb_xy-mb_stride]==MV_FROZEN) j=1;
+ if(mb_y+1<mb_height && fixed[mb_xy+mb_stride]==MV_FROZEN) j=1;
+ if(j==0) continue;
+
+ j=0;
+ if(mb_x>0 && fixed[mb_xy-1 ]==MV_CHANGED) j=1;
+ if(mb_x+1<mb_width && fixed[mb_xy+1 ]==MV_CHANGED) j=1;
+ if(mb_y>0 && fixed[mb_xy-mb_stride]==MV_CHANGED) j=1;
+ if(mb_y+1<mb_height && fixed[mb_xy+mb_stride]==MV_CHANGED) j=1;
+ if(j==0 && pass>1) continue;
+
+ none_left=0;
+
+ if(mb_x>0 && fixed[mb_xy-1]){
+ mv_predictor[pred_count][0]= s->motion_val[mot_index - 2][0];
+ mv_predictor[pred_count][1]= s->motion_val[mot_index - 2][1];
+ pred_count++;
+ }
+ if(mb_x+1<mb_width && fixed[mb_xy+1]){
+ mv_predictor[pred_count][0]= s->motion_val[mot_index + 2][0];
+ mv_predictor[pred_count][1]= s->motion_val[mot_index + 2][1];
+ pred_count++;
+ }
+ if(mb_y>0 && fixed[mb_xy-mb_stride]){
+ mv_predictor[pred_count][0]= s->motion_val[mot_index - mot_stride*2][0];
+ mv_predictor[pred_count][1]= s->motion_val[mot_index - mot_stride*2][1];
+ pred_count++;
+ }
+ if(mb_y+1<mb_height && fixed[mb_xy+mb_stride]){
+ mv_predictor[pred_count][0]= s->motion_val[mot_index + mot_stride*2][0];
+ mv_predictor[pred_count][1]= s->motion_val[mot_index + mot_stride*2][1];
+ pred_count++;
+ }
+ if(pred_count==0) continue;
+
+ if(pred_count>1){
+ int sum_x=0, sum_y=0;
+ int max_x, max_y, min_x, min_y;
+
+ for(j=0; j<pred_count; j++){
+ sum_x+= mv_predictor[j][0];
+ sum_y+= mv_predictor[j][1];
+ }
+
+ /* mean */
+ mv_predictor[pred_count][0] = sum_x/j;
+ mv_predictor[pred_count][1] = sum_y/j;
+
+ /* median */
+ if(pred_count>=3){
+ min_y= min_x= 99999;
+ max_y= max_x=-99999;
+ }else{
+ min_x=min_y=max_x=max_y=0;
+ }
+ for(j=0; j<pred_count; j++){
+ max_x= FFMAX(max_x, mv_predictor[j][0]);
+ max_y= FFMAX(max_y, mv_predictor[j][1]);
+ min_x= FFMIN(min_x, mv_predictor[j][0]);
+ min_y= FFMIN(min_y, mv_predictor[j][1]);
+ }
+ mv_predictor[pred_count+1][0] = sum_x - max_x - min_x;
+ mv_predictor[pred_count+1][1] = sum_y - max_y - min_y;
+
+ if(pred_count==4){
+ mv_predictor[pred_count+1][0] /= 2;
+ mv_predictor[pred_count+1][1] /= 2;
+ }
+ pred_count+=2;
+ }
+
+ /* zero MV */
+ pred_count++;
+
+ /* last MV */
+ mv_predictor[pred_count][0]= s->motion_val[mot_index][0];
+ mv_predictor[pred_count][1]= s->motion_val[mot_index][1];
+ pred_count++;
+
+ s->mv_dir = MV_DIR_FORWARD;
+ s->mb_intra=0;
+ s->mv_type = MV_TYPE_16X16;
+ s->mb_skiped=0;
+
+ s->dsp.clear_blocks(s->block[0]);
+
+ s->mb_x= mb_x;
+ s->mb_y= mb_y;
+
+ for(j=0; j<pred_count; j++){
+ int score=0;
+ uint8_t *src= s->current_picture.data[0] + mb_x*16 + mb_y*16*s->linesize;
+
+ s->motion_val[mot_index][0]= s->mv[0][0][0]= mv_predictor[j][0];
+ s->motion_val[mot_index][1]= s->mv[0][0][1]= mv_predictor[j][1];
+
+ decode_mb(s);
+
+ if(mb_x>0 && fixed[mb_xy-1]){
+ int k;
+ for(k=0; k<16; k++)
+ score += ABS(src[k*s->linesize-1 ]-src[k*s->linesize ]);
+ }
+ if(mb_x+1<mb_width && fixed[mb_xy+1]){
+ int k;
+ for(k=0; k<16; k++)
+ score += ABS(src[k*s->linesize+15]-src[k*s->linesize+16]);
+ }
+ if(mb_y>0 && fixed[mb_xy-mb_stride]){
+ int k;
+ for(k=0; k<16; k++)
+ score += ABS(src[k-s->linesize ]-src[k ]);
+ }
+ if(mb_y+1<mb_height && fixed[mb_xy+mb_stride]){
+ int k;
+ for(k=0; k<16; k++)
+ score += ABS(src[k+s->linesize*15]-src[k+s->linesize*16]);
+ }
+
+ if(score <= best_score){ // <= will favor the last MV
+ best_score= score;
+ best_pred= j;
+ }
+ }
+score_sum+= best_score;
+//FIXME no need to set s->motion_val[mot_index][0] explicit
+ s->motion_val[mot_index][0]= s->mv[0][0][0]= mv_predictor[best_pred][0];
+ s->motion_val[mot_index][1]= s->mv[0][0][1]= mv_predictor[best_pred][1];
+
+ decode_mb(s);
+
+
+ if(s->mv[0][0][0] != prev_x || s->mv[0][0][1] != prev_y){
+ fixed[mb_xy]=MV_CHANGED;
+ changed++;
+ }else
+ fixed[mb_xy]=MV_UNCHANGED;
+ }
+ }
+
+// printf(".%d/%d", changed, score_sum); fflush(stdout);
+ }
+
+ if(none_left)
+ return;
+
+ for(i=0; i<s->mb_num; i++){
+ int mb_xy= s->mb_index2xy[i];
+ if(fixed[mb_xy])
+ fixed[mb_xy]=MV_FROZEN;
+ }
+// printf(":"); fflush(stdout);
+ }
+}
+
+static int is_intra_more_likely(MpegEncContext *s){
+ int is_intra_likely, i, j, undamaged_count, skip_amount, mb_x, mb_y;
+
+ if(s->last_picture_ptr==NULL) return 1; //no previous frame available -> use spatial prediction
+
+ undamaged_count=0;
+ for(i=0; i<s->mb_num; i++){
+ const int mb_xy= s->mb_index2xy[i];
+ const int error= s->error_status_table[mb_xy];
+ if(!((error&DC_ERROR) && (error&MV_ERROR)))
+ undamaged_count++;
+ }
+
+ if(undamaged_count < 5) return 0; //allmost all MBs damaged -> use temporal prediction
+
+ skip_amount= FFMAX(undamaged_count/50, 1); //check only upto 50 MBs
+ is_intra_likely=0;
+
+ j=0;
+ for(mb_y= 0; mb_y<s->mb_height-1; mb_y++){
+ for(mb_x= 0; mb_x<s->mb_width; mb_x++){
+ int error;
+ const int mb_xy= mb_x + mb_y*s->mb_stride;
+
+ error= s->error_status_table[mb_xy];
+ if((error&DC_ERROR) && (error&MV_ERROR))
+ continue; //skip damaged
+
+ j++;
+ if((j%skip_amount) != 0) continue; //skip a few to speed things up
+
+ if(s->pict_type==I_TYPE){
+ uint8_t *mb_ptr = s->current_picture.data[0] + mb_x*16 + mb_y*16*s->linesize;
+ uint8_t *last_mb_ptr= s->last_picture.data [0] + mb_x*16 + mb_y*16*s->linesize;
+
+ is_intra_likely += s->dsp.pix_abs16x16(last_mb_ptr, mb_ptr , s->linesize);
+ is_intra_likely -= s->dsp.pix_abs16x16(last_mb_ptr, last_mb_ptr+s->linesize*16, s->linesize);
+ }else{
+ if(IS_INTRA(s->current_picture.mb_type[mb_xy]))
+ is_intra_likely++;
+ else
+ is_intra_likely--;
+ }
+ }
+ }
+//printf("is_intra_likely: %d type:%d\n", is_intra_likely, s->pict_type);
+ return is_intra_likely > 0;
+}
+
+void ff_er_frame_start(MpegEncContext *s){
+ if(!s->error_resilience) return;
+
+ memset(s->error_status_table, MV_ERROR|AC_ERROR|DC_ERROR|VP_START|AC_END|DC_END|MV_END, s->mb_stride*s->mb_height*sizeof(uint8_t));
+ s->error_count= 3*s->mb_num;
+}
+
+/**
+ * adds a slice.
+ * @param endx x component of the last macroblock, can be -1 for the last of the previous line
+ * @param status the status at the end (MV_END, AC_ERROR, ...), it is assumed that no earlier end or
+ * error of the same type occured
+ */
+void ff_er_add_slice(MpegEncContext *s, int startx, int starty, int endx, int endy, int status){
+ const int start_i= clip(startx + starty * s->mb_width , 0, s->mb_num-1);
+ const int end_i = clip(endx + endy * s->mb_width , 0, s->mb_num);
+ const int start_xy= s->mb_index2xy[start_i];
+ const int end_xy = s->mb_index2xy[end_i];
+ int mask= -1;
+
+ if(!s->error_resilience) return;
+
+ mask &= ~VP_START;
+ if(status & (AC_ERROR|AC_END)){
+ mask &= ~(AC_ERROR|AC_END);
+ s->error_count -= end_i - start_i + 1;
+ }
+ if(status & (DC_ERROR|DC_END)){
+ mask &= ~(DC_ERROR|DC_END);
+ s->error_count -= end_i - start_i + 1;
+ }
+ if(status & (MV_ERROR|MV_END)){
+ mask &= ~(MV_ERROR|MV_END);
+ s->error_count -= end_i - start_i + 1;
+ }
+
+ if(status & (AC_ERROR|DC_ERROR|MV_ERROR)) s->error_count= INT_MAX;
+
+ if(mask == ~0x7F){
+ memset(&s->error_status_table[start_xy], 0, (end_xy - start_xy) * sizeof(uint8_t));
+ }else{
+ int i;
+ for(i=start_xy; i<end_xy; i++){
+ s->error_status_table[ i ] &= mask;
+ }
+ }
+
+ if(end_i == s->mb_num)
+ s->error_count= INT_MAX;
+ else{
+ s->error_status_table[end_xy] &= mask;
+ s->error_status_table[end_xy] |= status;
+ }
+
+ s->error_status_table[start_xy] |= VP_START;
+
+ if(start_xy > 0){
+ int prev_status= s->error_status_table[ s->mb_index2xy[start_i - 1] ];
+
+ prev_status &= ~ VP_START;
+ if(prev_status != (MV_END|DC_END|AC_END)) s->error_count= INT_MAX;
+ }
+}
+
+void ff_er_frame_end(MpegEncContext *s){
+ int i, mb_x, mb_y, error, error_type;
+ int distance;
+ int threshold_part[4]= {100,100,100};
+ int threshold= 50;
+ int is_intra_likely;
+
+ if(!s->error_resilience || s->error_count==0) return;
+
+ fprintf(stderr, "concealing errors\n");
+
+ if(s->motion_val == NULL){
+ int size = (2 * s->mb_width + 2) * (2 * s->mb_height + 2);
+
+ fprintf(stderr, "Warning MVs not available\n");
+
+ s->motion_val= av_mallocz(size * 2 * sizeof(int16_t));
+ }
+
+ if(s->avctx->debug&FF_DEBUG_ER){
+ for(mb_y=0; mb_y<s->mb_height; mb_y++){
+ for(mb_x=0; mb_x<s->mb_width; mb_x++){
+ int status= s->error_status_table[mb_x + mb_y*s->mb_stride];
+
+ printf("%2X ", status);
+ }
+ printf("\n");
+ }
+ }
+
+#if 1
+ /* handle overlapping slices */
+ for(error_type=1; error_type<=3; error_type++){
+ int end_ok=0;
+
+ for(i=s->mb_num-1; i>=0; i--){
+ const int mb_xy= s->mb_index2xy[i];
+ int error= s->error_status_table[mb_xy];
+
+ if(error&(1<<error_type))
+ end_ok=1;
+ if(error&(8<<error_type))
+ end_ok=1;
+
+ if(!end_ok)
+ s->error_status_table[mb_xy]|= 1<<error_type;
+
+ if(error&VP_START)
+ end_ok=0;
+ }
+ }
+#endif
+#if 1
+ /* handle slices with partitions of different length */
+ if(s->partitioned_frame){
+ int end_ok=0;
+
+ for(i=s->mb_num-1; i>=0; i--){
+ const int mb_xy= s->mb_index2xy[i];
+ int error= s->error_status_table[mb_xy];
+
+ if(error&AC_END)
+ end_ok=0;
+ if((error&MV_END) || (error&DC_END) || (error&AC_ERROR))
+ end_ok=1;
+
+ if(!end_ok)
+ s->error_status_table[mb_xy]|= AC_ERROR;
+
+ if(error&VP_START)
+ end_ok=0;
+ }
+ }
+#endif
+ /* handle missing slices */
+ if(s->error_resilience>=4){
+ int end_ok=1;
+
+ for(i=s->mb_num-2; i>=s->mb_width+100; i--){ //FIXME +100 hack
+ const int mb_xy= s->mb_index2xy[i];
+ int error1= s->error_status_table[mb_xy ];
+ int error2= s->error_status_table[s->mb_index2xy[i+1]];
+
+ if(error1&VP_START)
+ end_ok=1;
+
+ if( error2==(VP_START|DC_ERROR|AC_ERROR|MV_ERROR|AC_END|DC_END|MV_END)
+ && error1!=(VP_START|DC_ERROR|AC_ERROR|MV_ERROR|AC_END|DC_END|MV_END)
+ && ((error1&AC_END) || (error1&DC_END) || (error1&MV_END))){ //end & uninited
+ end_ok=0;
+ }
+
+ if(!end_ok)
+ s->error_status_table[mb_xy]|= DC_ERROR|AC_ERROR|MV_ERROR;
+ }
+ }
+
+#if 1
+ /* backward mark errors */
+ distance=9999999;
+ for(error_type=1; error_type<=3; error_type++){
+ for(i=s->mb_num-1; i>=0; i--){
+ const int mb_xy= s->mb_index2xy[i];
+ int error= s->error_status_table[mb_xy];
+
+ if(!s->mbskip_table[mb_xy]) //FIXME partition specific
+ distance++;
+ if(error&(1<<error_type))
+ distance= 0;
+
+ if(s->partitioned_frame){
+ if(distance < threshold_part[error_type-1])
+ s->error_status_table[mb_xy]|= 1<<error_type;
+ }else{
+ if(distance < threshold)
+ s->error_status_table[mb_xy]|= 1<<error_type;
+ }
+
+ if(error&VP_START)
+ distance= 9999999;
+ }
+ }
+#endif
+
+ /* forward mark errors */
+ error=0;
+ for(i=0; i<s->mb_num; i++){
+ const int mb_xy= s->mb_index2xy[i];
+ int old_error= s->error_status_table[mb_xy];
+
+ if(old_error&VP_START)
+ error= old_error& (DC_ERROR|AC_ERROR|MV_ERROR);
+ else{
+ error|= old_error& (DC_ERROR|AC_ERROR|MV_ERROR);
+ s->error_status_table[mb_xy]|= error;
+ }
+ }
+#if 1
+ /* handle not partitioned case */
+ if(!s->partitioned_frame){
+ for(i=0; i<s->mb_num; i++){
+ const int mb_xy= s->mb_index2xy[i];
+ error= s->error_status_table[mb_xy];
+ if(error&(AC_ERROR|DC_ERROR|MV_ERROR))
+ error|= AC_ERROR|DC_ERROR|MV_ERROR;
+ s->error_status_table[mb_xy]= error;
+ }
+ }
+#endif
+ is_intra_likely= is_intra_more_likely(s);
+
+ /* set unknown mb-type to most likely */
+ for(i=0; i<s->mb_num; i++){
+ const int mb_xy= s->mb_index2xy[i];
+ error= s->error_status_table[mb_xy];
+ if(!((error&DC_ERROR) && (error&MV_ERROR)))
+ continue;
+
+ if(is_intra_likely)
+ s->current_picture.mb_type[mb_xy]= MB_TYPE_INTRA4x4;
+ else
+ s->current_picture.mb_type[mb_xy]= MB_TYPE_16x16 | MB_TYPE_L0;
+ }
+
+ /* handle inter blocks with damaged AC */
+ for(mb_y=0; mb_y<s->mb_height; mb_y++){
+ for(mb_x=0; mb_x<s->mb_width; mb_x++){
+ const int mb_xy= mb_x + mb_y * s->mb_stride;
+ const int mb_type= s->current_picture.mb_type[mb_xy];
+ error= s->error_status_table[mb_xy];
+
+ if(IS_INTRA(mb_type)) continue; //intra
+ if(error&MV_ERROR) continue; //inter with damaged MV
+ if(!(error&AC_ERROR)) continue; //undamaged inter
+
+ s->mv_dir = MV_DIR_FORWARD;
+ s->mb_intra=0;
+ s->mb_skiped=0;
+ if(IS_8X8(mb_type)){
+ int mb_index= mb_x*2+1 + (mb_y*2+1)*s->block_wrap[0];
+ int j;
+ s->mv_type = MV_TYPE_8X8;
+ for(j=0; j<4; j++){
+ s->mv[0][j][0] = s->motion_val[ mb_index + (j&1) + (j>>1)*s->block_wrap[0] ][0];
+ s->mv[0][j][1] = s->motion_val[ mb_index + (j&1) + (j>>1)*s->block_wrap[0] ][1];
+ }
+ }else{
+ s->mv_type = MV_TYPE_16X16;
+ s->mv[0][0][0] = s->motion_val[ mb_x*2+1 + (mb_y*2+1)*s->block_wrap[0] ][0];
+ s->mv[0][0][1] = s->motion_val[ mb_x*2+1 + (mb_y*2+1)*s->block_wrap[0] ][1];
+ }
+
+ s->dsp.clear_blocks(s->block[0]);
+
+ s->mb_x= mb_x;
+ s->mb_y= mb_y;
+ decode_mb(s);
+ }
+ }
+
+ /* guess MVs */
+ if(s->pict_type==B_TYPE){
+ for(mb_y=0; mb_y<s->mb_height; mb_y++){
+ for(mb_x=0; mb_x<s->mb_width; mb_x++){
+ int xy= mb_x*2+1 + (mb_y*2+1)*s->block_wrap[0];
+ const int mb_xy= mb_x + mb_y * s->mb_stride;
+ const int mb_type= s->current_picture.mb_type[mb_xy];
+ error= s->error_status_table[mb_xy];
+
+ if(IS_INTRA(mb_type)) continue;
+ if(!(error&MV_ERROR)) continue; //inter with undamaged MV
+ if(!(error&AC_ERROR)) continue; //undamaged inter
+
+ s->mv_dir = MV_DIR_FORWARD|MV_DIR_BACKWARD;
+ s->mb_intra=0;
+ s->mv_type = MV_TYPE_16X16;
+ s->mb_skiped=0;
+
+ if(s->pp_time){
+ int time_pp= s->pp_time;
+ int time_pb= s->pb_time;
+
+ s->mv[0][0][0] = s->motion_val[xy][0]*time_pb/time_pp;
+ s->mv[0][0][1] = s->motion_val[xy][1]*time_pb/time_pp;
+ s->mv[1][0][0] = s->motion_val[xy][0]*(time_pb - time_pp)/time_pp;
+ s->mv[1][0][1] = s->motion_val[xy][1]*(time_pb - time_pp)/time_pp;
+ }else{
+ s->mv[0][0][0]= 0;
+ s->mv[0][0][1]= 0;
+ s->mv[1][0][0]= 0;
+ s->mv[1][0][1]= 0;
+ }
+
+ s->dsp.clear_blocks(s->block[0]);
+ s->mb_x= mb_x;
+ s->mb_y= mb_y;
+ decode_mb(s);
+ }
+ }
+ }else
+ guess_mv(s);
+
+#ifdef HAVE_XVMC
+ /* the filters below are not XvMC compatible, skip them */
+ if(s->avctx->xvmc_acceleration) goto ec_clean;
+#endif
+ /* fill DC for inter blocks */
+ for(mb_y=0; mb_y<s->mb_height; mb_y++){
+ for(mb_x=0; mb_x<s->mb_width; mb_x++){
+ int dc, dcu, dcv, y, n;
+ int16_t *dc_ptr;
+ uint8_t *dest_y, *dest_cb, *dest_cr;
+ const int mb_xy= mb_x + mb_y * s->mb_stride;
+ const int mb_type= s->current_picture.mb_type[mb_xy];
+
+ error= s->error_status_table[mb_xy];
+
+ if(IS_INTRA(mb_type) && s->partitioned_frame) continue;
+// if(error&MV_ERROR) continue; //inter data damaged FIXME is this good?
+
+ dest_y = s->current_picture.data[0] + mb_x*16 + mb_y*16*s->linesize;
+ dest_cb= s->current_picture.data[1] + mb_x*8 + mb_y*8 *s->uvlinesize;
+ dest_cr= s->current_picture.data[2] + mb_x*8 + mb_y*8 *s->uvlinesize;
+
+ dc_ptr= &s->dc_val[0][mb_x*2+1 + (mb_y*2+1)*(s->mb_width*2+2)];
+ for(n=0; n<4; n++){
+ dc=0;
+ for(y=0; y<8; y++){
+ int x;
+ for(x=0; x<8; x++){
+ dc+= dest_y[x + (n&1)*8 + (y + (n>>1)*8)*s->linesize];
+ }
+ }
+ dc_ptr[(n&1) + (n>>1)*(s->mb_width*2+2)]= (dc+4)>>3;
+ }
+
+ dcu=dcv=0;
+ for(y=0; y<8; y++){
+ int x;
+ for(x=0; x<8; x++){
+ dcu+=dest_cb[x + y*(s->uvlinesize)];
+ dcv+=dest_cr[x + y*(s->uvlinesize)];
+ }
+ }
+ s->dc_val[1][mb_x+1 + (mb_y+1)*(s->mb_width+2)]= (dcu+4)>>3;
+ s->dc_val[2][mb_x+1 + (mb_y+1)*(s->mb_width+2)]= (dcv+4)>>3;
+ }
+ }
+#if 1
+ /* guess DC for damaged blocks */
+ guess_dc(s, s->dc_val[0] + s->mb_width*2+3, s->mb_width*2, s->mb_height*2, s->mb_width*2+2, 1);
+ guess_dc(s, s->dc_val[1] + s->mb_width +3, s->mb_width , s->mb_height , s->mb_width +2, 0);
+ guess_dc(s, s->dc_val[2] + s->mb_width +3, s->mb_width , s->mb_height , s->mb_width +2, 0);
+#endif
+ /* filter luma DC */
+ filter181(s->dc_val[0] + s->mb_width*2+3, s->mb_width*2, s->mb_height*2, s->mb_width*2+2);
+
+#if 1
+ /* render DC only intra */
+ for(mb_y=0; mb_y<s->mb_height; mb_y++){
+ for(mb_x=0; mb_x<s->mb_width; mb_x++){
+ uint8_t *dest_y, *dest_cb, *dest_cr;
+ const int mb_xy= mb_x + mb_y * s->mb_stride;
+ const int mb_type= s->current_picture.mb_type[mb_xy];
+
+ error= s->error_status_table[mb_xy];
+
+ if(IS_INTER(mb_type)) continue;
+ if(!(error&AC_ERROR)) continue; //undamaged
+
+ dest_y = s->current_picture.data[0] + mb_x*16 + mb_y*16*s->linesize;
+ dest_cb= s->current_picture.data[1] + mb_x*8 + mb_y*8 *s->uvlinesize;
+ dest_cr= s->current_picture.data[2] + mb_x*8 + mb_y*8 *s->uvlinesize;
+
+ put_dc(s, dest_y, dest_cb, dest_cr, mb_x, mb_y);
+ }
+ }
+#endif
+
+ if(s->avctx->error_concealment&FF_EC_DEBLOCK){
+ /* filter horizontal block boundaries */
+ h_block_filter(s, s->current_picture.data[0], s->mb_width*2, s->mb_height*2, s->linesize , 1);
+ h_block_filter(s, s->current_picture.data[1], s->mb_width , s->mb_height , s->uvlinesize, 0);
+ h_block_filter(s, s->current_picture.data[2], s->mb_width , s->mb_height , s->uvlinesize, 0);
+
+ /* filter vertical block boundaries */
+ v_block_filter(s, s->current_picture.data[0], s->mb_width*2, s->mb_height*2, s->linesize , 1);
+ v_block_filter(s, s->current_picture.data[1], s->mb_width , s->mb_height , s->uvlinesize, 0);
+ v_block_filter(s, s->current_picture.data[2], s->mb_width , s->mb_height , s->uvlinesize, 0);
+ }
+
+#ifdef HAVE_XVMC
+ec_clean:
+#endif
+ /* clean a few tables */
+ for(i=0; i<s->mb_num; i++){
+ const int mb_xy= s->mb_index2xy[i];
+ int error= s->error_status_table[mb_xy];
+
+ if(s->pict_type!=B_TYPE && (error&(DC_ERROR|MV_ERROR|AC_ERROR))){
+ s->mbskip_table[mb_xy]=0;
+ }
+ s->mbintra_table[mb_xy]=1;
+ }
+}
projects / synfig.git / blobdiff