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ffmpeg-rockchip/libavcodec/error_resilience.c
Michael Niedermayer 4d2858deac better/cleaner error resilience (done in a 2nd pass after decoding) 
h263/mpeg4 out of order slice decoding

Originally committed as revision 1030 to svn://svn.ffmpeg.org/ffmpeg/trunk
2002-10-13 13:16:04 +00:00

886 lines
33 KiB
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/*
* 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
*/
#include "avcodec.h"
#include "dsputil.h"
#include "mpegvideo.h"
/**
* 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 *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 *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 guess, weight_sum;
mb_index= (b_x>>is_luma) + (b_y>>is_luma)*s->mb_width;
error= s->error_status_table[mb_index];
if(!(s->mb_type[mb_index]&MB_TYPE_INTRA)) 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_width;
int error_j= s->error_status_table[mb_index_j];
int intra_j= s->mb_type[mb_index_j]&MB_TYPE_INTRA;
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_width;
int error_j= s->error_status_table[mb_index_j];
int intra_j= s->mb_type[mb_index_j]&MB_TYPE_INTRA;
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_width;
int error_j= s->error_status_table[mb_index_j];
int intra_j= s->mb_type[mb_index_j]&MB_TYPE_INTRA;
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_width;
int error_j= s->error_status_table[mb_index_j];
int intra_j= s->mb_type[mb_index_j]&MB_TYPE_INTRA;
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 weight= 256*256*256*16/distance[j];
guess+= weight*(INT64)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 *dst, int w, int h, int stride, int is_luma){
int b_x, b_y;
UINT8 *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_width];
int right_status= s->error_status_table[((b_x+1)>>is_luma) + (b_y>>is_luma)*s->mb_width];
int left_intra= s->mb_type [( b_x >>is_luma) + (b_y>>is_luma)*s->mb_width]&MB_TYPE_INTRA;
int right_intra= s->mb_type [((b_x+1)>>is_luma) + (b_y>>is_luma)*s->mb_width]&MB_TYPE_INTRA;
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 *left_mv= s->motion_val[s->block_wrap[0]*((b_y<<(1-is_luma)) + 1) + ( b_x <<(1-is_luma))];
INT16 *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= MAX(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 *dst, int w, int h, int stride, int is_luma){
int b_x, b_y;
UINT8 *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_width];
int bottom_status= s->error_status_table[(b_x>>is_luma) + ((b_y+1)>>is_luma)*s->mb_width];
int top_intra= s->mb_type [(b_x>>is_luma) + ( b_y >>is_luma)*s->mb_width]&MB_TYPE_INTRA;
int bottom_intra= s->mb_type [(b_x>>is_luma) + ((b_y+1)>>is_luma)*s->mb_width]&MB_TYPE_INTRA;
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 *top_mv= s->motion_val[s->block_wrap[0]*(( b_y <<(1-is_luma)) + 1) + (b_x<<(1-is_luma))];
INT16 *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= MAX(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 fixed[s->mb_num];
#define MV_FROZEN 3
#define MV_CHANGED 2
#define MV_UNCHANGED 1
const int mb_width = s->mb_width;
const int mb_height= s->mb_height;
int i, depth, num_avail;
num_avail=0;
for(i=0; i<s->mb_num; i++){
int f=0;
int error= s->error_status_table[i];
if(s->mb_type[i]&MB_TYPE_INTRA) f=MV_FROZEN; //intra //FIXME check
if(!(error&MV_ERROR)) f=MV_FROZEN; //inter with undamaged MV
fixed[i]= f;
if(f==MV_FROZEN)
num_avail++;
}
if((!(s->avctx->error_concealment&FF_EC_GUESS_MVS)) || num_avail <= mb_width/2){
int mb_x, mb_y;
i= -1;
for(mb_y=0; mb_y<s->mb_height; mb_y++){
for(mb_x=0; mb_x<s->mb_width; mb_x++){
i++;
if(s->mb_type[i]&MB_TYPE_INTRA) continue;
if(!(s->error_status_table[i]&MV_ERROR)) continue;
s->mv_dir = MV_DIR_FORWARD;
s->mb_intra=0;
s->mv_type = MV_TYPE_16X16;
s->mb_skiped=0;
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;
MPV_decode_mb(s, s->block);
}
}
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 i,mb_x, mb_y;
int score_sum=0;
changed=0;
i= -1;
for(mb_y=0; mb_y<s->mb_height; mb_y++){
for(mb_x=0; mb_x<s->mb_width; mb_x++){
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];
i++;
if((mb_x^mb_y^pass)&1) continue;
if(fixed[i]==MV_FROZEN) continue;
j=0;
if(mb_x>0 && fixed[i-1 ]==MV_FROZEN) j=1;
if(mb_x+1<mb_width && fixed[i+1 ]==MV_FROZEN) j=1;
if(mb_y>0 && fixed[i-mb_width]==MV_FROZEN) j=1;
if(mb_y+1<mb_height && fixed[i+mb_width]==MV_FROZEN) j=1;
if(j==0) continue;
j=0;
if(mb_x>0 && fixed[i-1 ]==MV_CHANGED) j=1;
if(mb_x+1<mb_width && fixed[i+1 ]==MV_CHANGED) j=1;
if(mb_y>0 && fixed[i-mb_width]==MV_CHANGED) j=1;
if(mb_y+1<mb_height && fixed[i+mb_width]==MV_CHANGED) j=1;
if(j==0 && pass>1) continue;
none_left=0;
if(mb_x>0 && fixed[i-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[i+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[i-mb_width]){
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[i+mb_width]){
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= MAX(max_x, mv_predictor[j][0]);
max_y= MAX(max_y, mv_predictor[j][1]);
min_x= MIN(min_x, mv_predictor[j][0]);
min_y= MIN(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;
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 *src= s->current_picture[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];
MPV_decode_mb(s, s->block);
if(mb_x>0 && fixed[i-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[i+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[i-mb_width]){
int k;
for(k=0; k<16; k++)
score += ABS(src[k-s->linesize ]-src[k ]);
}
if(mb_y+1<mb_height && fixed[i+mb_width]){
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];
MPV_decode_mb(s, s->block);
if(s->mv[0][0][0] != prev_x || s->mv[0][0][1] != prev_y){
fixed[i]=MV_CHANGED;
changed++;
}else
fixed[i]=MV_UNCHANGED;
}
}
// printf(".%d/%d", changed, score_sum); fflush(stdout);
}
if(none_left)
return;
for(i=0; i<s->mb_num; i++){
if(fixed[i])
fixed[i]=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;
undamaged_count=0;
for(i=0; i<s->mb_num; i++){
int error= s->error_status_table[i];
if(!((error&DC_ERROR) && (error&MV_ERROR)))
undamaged_count++;
}
if(undamaged_count < 5) return 0; //allmost all MBs damaged -> use temporal prediction
skip_amount= MAX(undamaged_count/50, 1); //check only upto 50 MBs
is_intra_likely=0;
j=0;
i=-1;
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;
i++;
error= s->error_status_table[i];
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 *mb_ptr = s->current_picture[0] + mb_x*16 + mb_y*16*s->linesize;
UINT8 *last_mb_ptr= s->last_picture [0] + mb_x*16 + mb_y*16*s->linesize;
is_intra_likely += pix_abs16x16(last_mb_ptr, mb_ptr , s->linesize);
is_intra_likely -= pix_abs16x16(last_mb_ptr, last_mb_ptr+s->linesize*16, s->linesize);
}else{
if(s->mbintra_table[i]) //HACK (this is allways inited but we should use mb_type[])
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_error_resilience(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 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--){
int error= s->error_status_table[i];
if(error&(1<<error_type))
end_ok=1;
if(error&(8<<error_type))
end_ok=1;
if(!end_ok)
s->error_status_table[i]|= 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--){
int error= s->error_status_table[i];
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[i]|= 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
int error1= s->error_status_table[i ];
int error2= s->error_status_table[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[i]|= 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--){
int error= s->error_status_table[i];
if(!s->mbskip_table[i]) //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[i]|= 1<<error_type;
}else{
if(distance < threshold)
s->error_status_table[i]|= 1<<error_type;
}
if(error&VP_START)
distance= 9999999;
}
}
#endif
/* forward mark errors */
error=0;
for(i=0; i<s->mb_num; i++){
int old_error= s->error_status_table[i];
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[i]|= error;
}
}
#if 1
/* handle not partitioned case */
if(!s->partitioned_frame){
for(i=0; i<s->mb_num; i++){
error= s->error_status_table[i];
if(error&(AC_ERROR|DC_ERROR|MV_ERROR))
error|= AC_ERROR|DC_ERROR|MV_ERROR;
s->error_status_table[i]= 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++){
int intra;
error= s->error_status_table[i];
if((error&DC_ERROR) && (error&MV_ERROR))
intra= is_intra_likely;
else
intra= s->mbintra_table[i];
if(intra)
s->mb_type[i]|= MB_TYPE_INTRA;
else
s->mb_type[i]&= ~MB_TYPE_INTRA;
}
/* handle inter blocks with damaged AC */
i= -1;
for(mb_y=0; mb_y<s->mb_height; mb_y++){
for(mb_x=0; mb_x<s->mb_width; mb_x++){
i++;
error= s->error_status_table[i];
if(s->mb_type[i]&MB_TYPE_INTRA) 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(s->mb_type[i]&MB_TYPE_INTER4V){
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];
}
clear_blocks(s->block[0]);
s->mb_x= mb_x;
s->mb_y= mb_y;
MPV_decode_mb(s, s->block);
}
}
/* guess MVs */
if(s->pict_type==B_TYPE){
i= -1;
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];
i++;
error= s->error_status_table[i];
if(s->mb_type[i]&MB_TYPE_INTRA) continue; //intra
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;
}
clear_blocks(s->block[0]);
s->mb_x= mb_x;
s->mb_y= mb_y;
MPV_decode_mb(s, s->block);
}
}
}else
guess_mv(s);
/* fill DC for inter blocks */
i= -1;
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 *dc_ptr;
UINT8 *dest_y, *dest_cb, *dest_cr;
i++;
error= s->error_status_table[i];
if(s->mb_type[i]&MB_TYPE_INTRA) continue; //intra
// if(error&MV_ERROR) continue; //inter data damaged FIXME is this good?
dest_y = s->current_picture[0] + mb_x*16 + mb_y*16*s->linesize;
dest_cb= s->current_picture[1] + mb_x*8 + mb_y*8 *s->uvlinesize;
dest_cr= s->current_picture[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 */
i= -1;
for(mb_y=0; mb_y<s->mb_height; mb_y++){
for(mb_x=0; mb_x<s->mb_width; mb_x++){
UINT8 *dest_y, *dest_cb, *dest_cr;
i++;
error= s->error_status_table[i];
if(!(s->mb_type[i]&MB_TYPE_INTRA)) continue; //inter
if(!(error&AC_ERROR)) continue; //undamaged
dest_y = s->current_picture[0] + mb_x*16 + mb_y*16*s->linesize;
dest_cb= s->current_picture[1] + mb_x*8 + mb_y*8 *s->uvlinesize;
dest_cr= s->current_picture[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[0], s->mb_width*2, s->mb_height*2, s->linesize , 1);
h_block_filter(s, s->current_picture[1], s->mb_width , s->mb_height , s->uvlinesize, 0);
h_block_filter(s, s->current_picture[2], s->mb_width , s->mb_height , s->uvlinesize, 0);
/* filter vertical block boundaries */
v_block_filter(s, s->current_picture[0], s->mb_width*2, s->mb_height*2, s->linesize , 1);
v_block_filter(s, s->current_picture[1], s->mb_width , s->mb_height , s->uvlinesize, 0);
v_block_filter(s, s->current_picture[2], s->mb_width , s->mb_height , s->uvlinesize, 0);
}
/* clean a few tables */
for(i=0; i<s->mb_num; i++){
int error= s->error_status_table[i];
if(s->pict_type!=B_TYPE && (error&(DC_ERROR|MV_ERROR|AC_ERROR))){
s->mbskip_table[i]=0;
}
s->mbintra_table[i]=1;
}
}
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