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ffmpeg / libavcodec / error_resilience.c @ fd1ef13b

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/*
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 * Error resilience / concealment
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 *
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 * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
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 *
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 * This file is part of FFmpeg.
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 *
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 * FFmpeg is free software; you can redistribute it and/or
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 * modify it under the terms of the GNU Lesser General Public
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 * License as published by the Free Software Foundation; either
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 * version 2.1 of the License, or (at your option) any later version.
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 *
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 * FFmpeg is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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 * Lesser General Public License for more details.
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 *
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 * You should have received a copy of the GNU Lesser General Public
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 * License along with FFmpeg; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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 */
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/**
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 * @file libavcodec/error_resilience.c
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 * Error resilience / concealment.
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 */
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#include <limits.h>
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#include "avcodec.h"
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#include "dsputil.h"
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#include "mpegvideo.h"
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static void decode_mb(MpegEncContext *s){
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    s->dest[0] = s->current_picture.data[0] + (s->mb_y * 16* s->linesize  ) + s->mb_x * 16;
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    s->dest[1] = s->current_picture.data[1] + (s->mb_y * 8 * s->uvlinesize) + s->mb_x * 8;
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    s->dest[2] = s->current_picture.data[2] + (s->mb_y * 8 * s->uvlinesize) + s->mb_x * 8;
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    MPV_decode_mb(s, s->block);
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}
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/**
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 * replaces the current MB with a flat dc only version.
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 */
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static void put_dc(MpegEncContext *s, uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr, int mb_x, int mb_y)
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{
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    int dc, dcu, dcv, y, i;
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    for(i=0; i<4; i++){
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        dc= s->dc_val[0][mb_x*2 + (i&1) + (mb_y*2 + (i>>1))*s->b8_stride];
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        if(dc<0) dc=0;
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        else if(dc>2040) dc=2040;
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        for(y=0; y<8; y++){
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            int x;
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            for(x=0; x<8; x++){
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                dest_y[x + (i&1)*8 + (y + (i>>1)*8)*s->linesize]= dc/8;
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            }
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        }
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    }
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    dcu = s->dc_val[1][mb_x + mb_y*s->mb_stride];
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    dcv = s->dc_val[2][mb_x + mb_y*s->mb_stride];
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    if     (dcu<0   ) dcu=0;
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    else if(dcu>2040) dcu=2040;
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    if     (dcv<0   ) dcv=0;
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    else if(dcv>2040) dcv=2040;
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    for(y=0; y<8; y++){
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        int x;
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        for(x=0; x<8; x++){
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            dest_cb[x + y*(s->uvlinesize)]= dcu/8;
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            dest_cr[x + y*(s->uvlinesize)]= dcv/8;
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        }
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    }
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}
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static void filter181(int16_t *data, int width, int height, int stride){
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    int x,y;
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    /* horizontal filter */
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    for(y=1; y<height-1; y++){
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        int prev_dc= data[0 + y*stride];
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        for(x=1; x<width-1; x++){
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            int dc;
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            dc= - prev_dc
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                + data[x     + y*stride]*8
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                - data[x + 1 + y*stride];
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            dc= (dc*10923 + 32768)>>16;
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            prev_dc= data[x + y*stride];
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            data[x + y*stride]= dc;
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        }
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    }
92

    
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    /* vertical filter */
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    for(x=1; x<width-1; x++){
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        int prev_dc= data[x];
96

    
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        for(y=1; y<height-1; y++){
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            int dc;
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            dc= - prev_dc
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                + data[x +  y   *stride]*8
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                - data[x + (y+1)*stride];
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            dc= (dc*10923 + 32768)>>16;
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            prev_dc= data[x + y*stride];
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            data[x + y*stride]= dc;
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        }
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    }
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}
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/**
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 * guess the dc of blocks which do not have an undamaged dc
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 * @param w     width in 8 pixel blocks
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 * @param h     height in 8 pixel blocks
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 */
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static void guess_dc(MpegEncContext *s, int16_t *dc, int w, int h, int stride, int is_luma){
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    int b_x, b_y;
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    for(b_y=0; b_y<h; b_y++){
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        for(b_x=0; b_x<w; b_x++){
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            int color[4]={1024,1024,1024,1024};
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            int distance[4]={9999,9999,9999,9999};
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            int mb_index, error, j;
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            int64_t guess, weight_sum;
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            mb_index= (b_x>>is_luma) + (b_y>>is_luma)*s->mb_stride;
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            error= s->error_status_table[mb_index];
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            if(IS_INTER(s->current_picture.mb_type[mb_index])) continue; //inter
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            if(!(error&DC_ERROR)) continue;           //dc-ok
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            /* right block */
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            for(j=b_x+1; j<w; j++){
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                int mb_index_j= (j>>is_luma) + (b_y>>is_luma)*s->mb_stride;
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                int error_j= s->error_status_table[mb_index_j];
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                int intra_j= IS_INTRA(s->current_picture.mb_type[mb_index_j]);
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                if(intra_j==0 || !(error_j&DC_ERROR)){
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                    color[0]= dc[j + b_y*stride];
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                    distance[0]= j-b_x;
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                    break;
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                }
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            }
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            /* left block */
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            for(j=b_x-1; j>=0; j--){
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                int mb_index_j= (j>>is_luma) + (b_y>>is_luma)*s->mb_stride;
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                int error_j= s->error_status_table[mb_index_j];
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                int intra_j= IS_INTRA(s->current_picture.mb_type[mb_index_j]);
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                if(intra_j==0 || !(error_j&DC_ERROR)){
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                    color[1]= dc[j + b_y*stride];
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                    distance[1]= b_x-j;
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                    break;
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                }
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            }
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            /* bottom block */
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            for(j=b_y+1; j<h; j++){
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                int mb_index_j= (b_x>>is_luma) + (j>>is_luma)*s->mb_stride;
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                int error_j= s->error_status_table[mb_index_j];
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                int intra_j= IS_INTRA(s->current_picture.mb_type[mb_index_j]);
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                if(intra_j==0 || !(error_j&DC_ERROR)){
162
                    color[2]= dc[b_x + j*stride];
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                    distance[2]= j-b_y;
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                    break;
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                }
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            }
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            /* top block */
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            for(j=b_y-1; j>=0; j--){
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                int mb_index_j= (b_x>>is_luma) + (j>>is_luma)*s->mb_stride;
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                int error_j= s->error_status_table[mb_index_j];
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                int intra_j= IS_INTRA(s->current_picture.mb_type[mb_index_j]);
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                if(intra_j==0 || !(error_j&DC_ERROR)){
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                    color[3]= dc[b_x + j*stride];
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                    distance[3]= b_y-j;
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                    break;
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                }
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            }
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            weight_sum=0;
181
            guess=0;
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            for(j=0; j<4; j++){
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                int64_t weight= 256*256*256*16/distance[j];
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                guess+= weight*(int64_t)color[j];
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                weight_sum+= weight;
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            }
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            guess= (guess + weight_sum/2) / weight_sum;
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            dc[b_x + b_y*stride]= guess;
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        }
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    }
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}
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/**
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 * simple horizontal deblocking filter used for error resilience
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 * @param w     width in 8 pixel blocks
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 * @param h     height in 8 pixel blocks
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 */
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static void h_block_filter(MpegEncContext *s, uint8_t *dst, int w, int h, int stride, int is_luma){
200
    int b_x, b_y;
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    uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
202

    
203
    for(b_y=0; b_y<h; b_y++){
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        for(b_x=0; b_x<w-1; b_x++){
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            int y;
206
            int left_status = s->error_status_table[( b_x   >>is_luma) + (b_y>>is_luma)*s->mb_stride];
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            int right_status= s->error_status_table[((b_x+1)>>is_luma) + (b_y>>is_luma)*s->mb_stride];
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            int left_intra=   IS_INTRA(s->current_picture.mb_type      [( b_x   >>is_luma) + (b_y>>is_luma)*s->mb_stride]);
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            int right_intra=  IS_INTRA(s->current_picture.mb_type      [((b_x+1)>>is_luma) + (b_y>>is_luma)*s->mb_stride]);
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            int left_damage =  left_status&(DC_ERROR|AC_ERROR|MV_ERROR);
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            int right_damage= right_status&(DC_ERROR|AC_ERROR|MV_ERROR);
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            int offset= b_x*8 + b_y*stride*8;
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            int16_t *left_mv=  s->current_picture.motion_val[0][s->b8_stride*(b_y<<(1-is_luma)) + ( b_x   <<(1-is_luma))];
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            int16_t *right_mv= s->current_picture.motion_val[0][s->b8_stride*(b_y<<(1-is_luma)) + ((b_x+1)<<(1-is_luma))];
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216
            if(!(left_damage||right_damage)) continue; // both undamaged
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218
            if(   (!left_intra) && (!right_intra)
219
               && FFABS(left_mv[0]-right_mv[0]) + FFABS(left_mv[1]+right_mv[1]) < 2) continue;
220

    
221
            for(y=0; y<8; y++){
222
                int a,b,c,d;
223

    
224
                a= dst[offset + 7 + y*stride] - dst[offset + 6 + y*stride];
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                b= dst[offset + 8 + y*stride] - dst[offset + 7 + y*stride];
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                c= dst[offset + 9 + y*stride] - dst[offset + 8 + y*stride];
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228
                d= FFABS(b) - ((FFABS(a) + FFABS(c) + 1)>>1);
229
                d= FFMAX(d, 0);
230
                if(b<0) d= -d;
231

    
232
                if(d==0) continue;
233

    
234
                if(!(left_damage && right_damage))
235
                    d= d*16/9;
236

    
237
                if(left_damage){
238
                    dst[offset + 7 + y*stride] = cm[dst[offset + 7 + y*stride] + ((d*7)>>4)];
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                    dst[offset + 6 + y*stride] = cm[dst[offset + 6 + y*stride] + ((d*5)>>4)];
240
                    dst[offset + 5 + y*stride] = cm[dst[offset + 5 + y*stride] + ((d*3)>>4)];
241
                    dst[offset + 4 + y*stride] = cm[dst[offset + 4 + y*stride] + ((d*1)>>4)];
242
                }
243
                if(right_damage){
244
                    dst[offset + 8 + y*stride] = cm[dst[offset + 8 + y*stride] - ((d*7)>>4)];
245
                    dst[offset + 9 + y*stride] = cm[dst[offset + 9 + y*stride] - ((d*5)>>4)];
246
                    dst[offset + 10+ y*stride] = cm[dst[offset +10 + y*stride] - ((d*3)>>4)];
247
                    dst[offset + 11+ y*stride] = cm[dst[offset +11 + y*stride] - ((d*1)>>4)];
248
                }
249
            }
250
        }
251
    }
252
}
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254
/**
255
 * simple vertical deblocking filter used for error resilience
256
 * @param w     width in 8 pixel blocks
257
 * @param h     height in 8 pixel blocks
258
 */
259
static void v_block_filter(MpegEncContext *s, uint8_t *dst, int w, int h, int stride, int is_luma){
260
    int b_x, b_y;
261
    uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
262

    
263
    for(b_y=0; b_y<h-1; b_y++){
264
        for(b_x=0; b_x<w; b_x++){
265
            int x;
266
            int top_status   = s->error_status_table[(b_x>>is_luma) + ( b_y   >>is_luma)*s->mb_stride];
267
            int bottom_status= s->error_status_table[(b_x>>is_luma) + ((b_y+1)>>is_luma)*s->mb_stride];
268
            int top_intra=     IS_INTRA(s->current_picture.mb_type      [(b_x>>is_luma) + ( b_y   >>is_luma)*s->mb_stride]);
269
            int bottom_intra=  IS_INTRA(s->current_picture.mb_type      [(b_x>>is_luma) + ((b_y+1)>>is_luma)*s->mb_stride]);
270
            int top_damage =      top_status&(DC_ERROR|AC_ERROR|MV_ERROR);
271
            int bottom_damage= bottom_status&(DC_ERROR|AC_ERROR|MV_ERROR);
272
            int offset= b_x*8 + b_y*stride*8;
273
            int16_t *top_mv=    s->current_picture.motion_val[0][s->b8_stride*( b_y   <<(1-is_luma)) + (b_x<<(1-is_luma))];
274
            int16_t *bottom_mv= s->current_picture.motion_val[0][s->b8_stride*((b_y+1)<<(1-is_luma)) + (b_x<<(1-is_luma))];
275

    
276
            if(!(top_damage||bottom_damage)) continue; // both undamaged
277

    
278
            if(   (!top_intra) && (!bottom_intra)
279
               && FFABS(top_mv[0]-bottom_mv[0]) + FFABS(top_mv[1]+bottom_mv[1]) < 2) continue;
280

    
281
            for(x=0; x<8; x++){
282
                int a,b,c,d;
283

    
284
                a= dst[offset + x + 7*stride] - dst[offset + x + 6*stride];
285
                b= dst[offset + x + 8*stride] - dst[offset + x + 7*stride];
286
                c= dst[offset + x + 9*stride] - dst[offset + x + 8*stride];
287

    
288
                d= FFABS(b) - ((FFABS(a) + FFABS(c)+1)>>1);
289
                d= FFMAX(d, 0);
290
                if(b<0) d= -d;
291

    
292
                if(d==0) continue;
293

    
294
                if(!(top_damage && bottom_damage))
295
                    d= d*16/9;
296

    
297
                if(top_damage){
298
                    dst[offset + x +  7*stride] = cm[dst[offset + x +  7*stride] + ((d*7)>>4)];
299
                    dst[offset + x +  6*stride] = cm[dst[offset + x +  6*stride] + ((d*5)>>4)];
300
                    dst[offset + x +  5*stride] = cm[dst[offset + x +  5*stride] + ((d*3)>>4)];
301
                    dst[offset + x +  4*stride] = cm[dst[offset + x +  4*stride] + ((d*1)>>4)];
302
                }
303
                if(bottom_damage){
304
                    dst[offset + x +  8*stride] = cm[dst[offset + x +  8*stride] - ((d*7)>>4)];
305
                    dst[offset + x +  9*stride] = cm[dst[offset + x +  9*stride] - ((d*5)>>4)];
306
                    dst[offset + x + 10*stride] = cm[dst[offset + x + 10*stride] - ((d*3)>>4)];
307
                    dst[offset + x + 11*stride] = cm[dst[offset + x + 11*stride] - ((d*1)>>4)];
308
                }
309
            }
310
        }
311
    }
312
}
313

    
314
static void guess_mv(MpegEncContext *s){
315
    uint8_t fixed[s->mb_stride * s->mb_height];
316
#define MV_FROZEN    3
317
#define MV_CHANGED   2
318
#define MV_UNCHANGED 1
319
    const int mb_stride = s->mb_stride;
320
    const int mb_width = s->mb_width;
321
    const int mb_height= s->mb_height;
322
    int i, depth, num_avail;
323
    int mb_x, mb_y;
324

    
325
    num_avail=0;
326
    for(i=0; i<s->mb_num; i++){
327
        const int mb_xy= s->mb_index2xy[ i ];
328
        int f=0;
329
        int error= s->error_status_table[mb_xy];
330

    
331
        if(IS_INTRA(s->current_picture.mb_type[mb_xy])) f=MV_FROZEN; //intra //FIXME check
332
        if(!(error&MV_ERROR)) f=MV_FROZEN;           //inter with undamaged MV
333

    
334
        fixed[mb_xy]= f;
335
        if(f==MV_FROZEN)
336
            num_avail++;
337
    }
338

    
339
    if((!(s->avctx->error_concealment&FF_EC_GUESS_MVS)) || num_avail <= mb_width/2){
340
        for(mb_y=0; mb_y<s->mb_height; mb_y++){
341
            for(mb_x=0; mb_x<s->mb_width; mb_x++){
342
                const int mb_xy= mb_x + mb_y*s->mb_stride;
343

    
344
                if(IS_INTRA(s->current_picture.mb_type[mb_xy]))  continue;
345
                if(!(s->error_status_table[mb_xy]&MV_ERROR)) continue;
346

    
347
                s->mv_dir = s->last_picture.data[0] ? MV_DIR_FORWARD : MV_DIR_BACKWARD;
348
                s->mb_intra=0;
349
                s->mv_type = MV_TYPE_16X16;
350
                s->mb_skipped=0;
351

    
352
                s->dsp.clear_blocks(s->block[0]);
353

    
354
                s->mb_x= mb_x;
355
                s->mb_y= mb_y;
356
                s->mv[0][0][0]= 0;
357
                s->mv[0][0][1]= 0;
358
                decode_mb(s);
359
            }
360
        }
361
        return;
362
    }
363

    
364
    for(depth=0;; depth++){
365
        int changed, pass, none_left;
366

    
367
        none_left=1;
368
        changed=1;
369
        for(pass=0; (changed || pass<2) && pass<10; pass++){
370
            int mb_x, mb_y;
371
int score_sum=0;
372

    
373
            changed=0;
374
            for(mb_y=0; mb_y<s->mb_height; mb_y++){
375
                for(mb_x=0; mb_x<s->mb_width; mb_x++){
376
                    const int mb_xy= mb_x + mb_y*s->mb_stride;
377
                    int mv_predictor[8][2]={{0}};
378
                    int pred_count=0;
379
                    int j;
380
                    int best_score=256*256*256*64;
381
                    int best_pred=0;
382
                    const int mot_stride= s->b8_stride;
383
                    const int mot_index= mb_x*2 + mb_y*2*mot_stride;
384
                    int prev_x= s->current_picture.motion_val[0][mot_index][0];
385
                    int prev_y= s->current_picture.motion_val[0][mot_index][1];
386

    
387
                    if((mb_x^mb_y^pass)&1) continue;
388

    
389
                    if(fixed[mb_xy]==MV_FROZEN) continue;
390
                    assert(!IS_INTRA(s->current_picture.mb_type[mb_xy]));
391
                    assert(s->last_picture_ptr && s->last_picture_ptr->data[0]);
392

    
393
                    j=0;
394
                    if(mb_x>0           && fixed[mb_xy-1        ]==MV_FROZEN) j=1;
395
                    if(mb_x+1<mb_width  && fixed[mb_xy+1        ]==MV_FROZEN) j=1;
396
                    if(mb_y>0           && fixed[mb_xy-mb_stride]==MV_FROZEN) j=1;
397
                    if(mb_y+1<mb_height && fixed[mb_xy+mb_stride]==MV_FROZEN) j=1;
398
                    if(j==0) continue;
399

    
400
                    j=0;
401
                    if(mb_x>0           && fixed[mb_xy-1        ]==MV_CHANGED) j=1;
402
                    if(mb_x+1<mb_width  && fixed[mb_xy+1        ]==MV_CHANGED) j=1;
403
                    if(mb_y>0           && fixed[mb_xy-mb_stride]==MV_CHANGED) j=1;
404
                    if(mb_y+1<mb_height && fixed[mb_xy+mb_stride]==MV_CHANGED) j=1;
405
                    if(j==0 && pass>1) continue;
406

    
407
                    none_left=0;
408

    
409
                    if(mb_x>0 && fixed[mb_xy-1]){
410
                        mv_predictor[pred_count][0]= s->current_picture.motion_val[0][mot_index - 2][0];
411
                        mv_predictor[pred_count][1]= s->current_picture.motion_val[0][mot_index - 2][1];
412
                        pred_count++;
413
                    }
414
                    if(mb_x+1<mb_width && fixed[mb_xy+1]){
415
                        mv_predictor[pred_count][0]= s->current_picture.motion_val[0][mot_index + 2][0];
416
                        mv_predictor[pred_count][1]= s->current_picture.motion_val[0][mot_index + 2][1];
417
                        pred_count++;
418
                    }
419
                    if(mb_y>0 && fixed[mb_xy-mb_stride]){
420
                        mv_predictor[pred_count][0]= s->current_picture.motion_val[0][mot_index - mot_stride*2][0];
421
                        mv_predictor[pred_count][1]= s->current_picture.motion_val[0][mot_index - mot_stride*2][1];
422
                        pred_count++;
423
                    }
424
                    if(mb_y+1<mb_height && fixed[mb_xy+mb_stride]){
425
                        mv_predictor[pred_count][0]= s->current_picture.motion_val[0][mot_index + mot_stride*2][0];
426
                        mv_predictor[pred_count][1]= s->current_picture.motion_val[0][mot_index + mot_stride*2][1];
427
                        pred_count++;
428
                    }
429
                    if(pred_count==0) continue;
430

    
431
                    if(pred_count>1){
432
                        int sum_x=0, sum_y=0;
433
                        int max_x, max_y, min_x, min_y;
434

    
435
                        for(j=0; j<pred_count; j++){
436
                            sum_x+= mv_predictor[j][0];
437
                            sum_y+= mv_predictor[j][1];
438
                        }
439

    
440
                        /* mean */
441
                        mv_predictor[pred_count][0] = sum_x/j;
442
                        mv_predictor[pred_count][1] = sum_y/j;
443

    
444
                        /* median */
445
                        if(pred_count>=3){
446
                            min_y= min_x= 99999;
447
                            max_y= max_x=-99999;
448
                        }else{
449
                            min_x=min_y=max_x=max_y=0;
450
                        }
451
                        for(j=0; j<pred_count; j++){
452
                            max_x= FFMAX(max_x, mv_predictor[j][0]);
453
                            max_y= FFMAX(max_y, mv_predictor[j][1]);
454
                            min_x= FFMIN(min_x, mv_predictor[j][0]);
455
                            min_y= FFMIN(min_y, mv_predictor[j][1]);
456
                        }
457
                        mv_predictor[pred_count+1][0] = sum_x - max_x - min_x;
458
                        mv_predictor[pred_count+1][1] = sum_y - max_y - min_y;
459

    
460
                        if(pred_count==4){
461
                            mv_predictor[pred_count+1][0] /= 2;
462
                            mv_predictor[pred_count+1][1] /= 2;
463
                        }
464
                        pred_count+=2;
465
                    }
466

    
467
                    /* zero MV */
468
                    pred_count++;
469

    
470
                    /* last MV */
471
                    mv_predictor[pred_count][0]= s->current_picture.motion_val[0][mot_index][0];
472
                    mv_predictor[pred_count][1]= s->current_picture.motion_val[0][mot_index][1];
473
                    pred_count++;
474

    
475
                    s->mv_dir = MV_DIR_FORWARD;
476
                    s->mb_intra=0;
477
                    s->mv_type = MV_TYPE_16X16;
478
                    s->mb_skipped=0;
479

    
480
                    s->dsp.clear_blocks(s->block[0]);
481

    
482
                    s->mb_x= mb_x;
483
                    s->mb_y= mb_y;
484

    
485
                    for(j=0; j<pred_count; j++){
486
                        int score=0;
487
                        uint8_t *src= s->current_picture.data[0] + mb_x*16 + mb_y*16*s->linesize;
488

    
489
                        s->current_picture.motion_val[0][mot_index][0]= s->mv[0][0][0]= mv_predictor[j][0];
490
                        s->current_picture.motion_val[0][mot_index][1]= s->mv[0][0][1]= mv_predictor[j][1];
491

    
492
                        decode_mb(s);
493

    
494
                        if(mb_x>0 && fixed[mb_xy-1]){
495
                            int k;
496
                            for(k=0; k<16; k++)
497
                                score += FFABS(src[k*s->linesize-1 ]-src[k*s->linesize   ]);
498
                        }
499
                        if(mb_x+1<mb_width && fixed[mb_xy+1]){
500
                            int k;
501
                            for(k=0; k<16; k++)
502
                                score += FFABS(src[k*s->linesize+15]-src[k*s->linesize+16]);
503
                        }
504
                        if(mb_y>0 && fixed[mb_xy-mb_stride]){
505
                            int k;
506
                            for(k=0; k<16; k++)
507
                                score += FFABS(src[k-s->linesize   ]-src[k               ]);
508
                        }
509
                        if(mb_y+1<mb_height && fixed[mb_xy+mb_stride]){
510
                            int k;
511
                            for(k=0; k<16; k++)
512
                                score += FFABS(src[k+s->linesize*15]-src[k+s->linesize*16]);
513
                        }
514

    
515
                        if(score <= best_score){ // <= will favor the last MV
516
                            best_score= score;
517
                            best_pred= j;
518
                        }
519
                    }
520
score_sum+= best_score;
521
//FIXME no need to set s->current_picture.motion_val[0][mot_index][0] explicit
522
                    s->current_picture.motion_val[0][mot_index][0]= s->mv[0][0][0]= mv_predictor[best_pred][0];
523
                    s->current_picture.motion_val[0][mot_index][1]= s->mv[0][0][1]= mv_predictor[best_pred][1];
524

    
525
                    decode_mb(s);
526

    
527

    
528
                    if(s->mv[0][0][0] != prev_x || s->mv[0][0][1] != prev_y){
529
                        fixed[mb_xy]=MV_CHANGED;
530
                        changed++;
531
                    }else
532
                        fixed[mb_xy]=MV_UNCHANGED;
533
                }
534
            }
535

    
536
//            printf(".%d/%d", changed, score_sum); fflush(stdout);
537
        }
538

    
539
        if(none_left)
540
            return;
541

    
542
        for(i=0; i<s->mb_num; i++){
543
            int mb_xy= s->mb_index2xy[i];
544
            if(fixed[mb_xy])
545
                fixed[mb_xy]=MV_FROZEN;
546
        }
547
//        printf(":"); fflush(stdout);
548
    }
549
}
550

    
551
static int is_intra_more_likely(MpegEncContext *s){
552
    int is_intra_likely, i, j, undamaged_count, skip_amount, mb_x, mb_y;
553

    
554
    if(!s->last_picture_ptr || !s->last_picture_ptr->data[0]) return 1; //no previous frame available -> use spatial prediction
555

    
556
    undamaged_count=0;
557
    for(i=0; i<s->mb_num; i++){
558
        const int mb_xy= s->mb_index2xy[i];
559
        const int error= s->error_status_table[mb_xy];
560
        if(!((error&DC_ERROR) && (error&MV_ERROR)))
561
            undamaged_count++;
562
    }
563

    
564
    if(undamaged_count < 5) return 0; //almost all MBs damaged -> use temporal prediction
565

    
566
    //prevent dsp.sad() check, that requires access to the image
567
    if(CONFIG_MPEG_XVMC_DECODER && s->avctx->xvmc_acceleration && s->pict_type == FF_I_TYPE)
568
        return 1;
569

    
570
    skip_amount= FFMAX(undamaged_count/50, 1); //check only upto 50 MBs
571
    is_intra_likely=0;
572

    
573
    j=0;
574
    for(mb_y= 0; mb_y<s->mb_height-1; mb_y++){
575
        for(mb_x= 0; mb_x<s->mb_width; mb_x++){
576
            int error;
577
            const int mb_xy= mb_x + mb_y*s->mb_stride;
578

    
579
            error= s->error_status_table[mb_xy];
580
            if((error&DC_ERROR) && (error&MV_ERROR))
581
                continue; //skip damaged
582

    
583
            j++;
584
            if((j%skip_amount) != 0) continue; //skip a few to speed things up
585

    
586
            if(s->pict_type==FF_I_TYPE){
587
                uint8_t *mb_ptr     = s->current_picture.data[0] + mb_x*16 + mb_y*16*s->linesize;
588
                uint8_t *last_mb_ptr= s->last_picture.data   [0] + mb_x*16 + mb_y*16*s->linesize;
589

    
590
                is_intra_likely += s->dsp.sad[0](NULL, last_mb_ptr, mb_ptr                    , s->linesize, 16);
591
                is_intra_likely -= s->dsp.sad[0](NULL, last_mb_ptr, last_mb_ptr+s->linesize*16, s->linesize, 16);
592
            }else{
593
                if(IS_INTRA(s->current_picture.mb_type[mb_xy]))
594
                   is_intra_likely++;
595
                else
596
                   is_intra_likely--;
597
            }
598
        }
599
    }
600
//printf("is_intra_likely: %d type:%d\n", is_intra_likely, s->pict_type);
601
    return is_intra_likely > 0;
602
}
603

    
604
void ff_er_frame_start(MpegEncContext *s){
605
    if(!s->error_recognition) return;
606

    
607
    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));
608
    s->error_count= 3*s->mb_num;
609
}
610

    
611
/**
612
 * adds a slice.
613
 * @param endx x component of the last macroblock, can be -1 for the last of the previous line
614
 * @param status the status at the end (MV_END, AC_ERROR, ...), it is assumed that no earlier end or
615
 *               error of the same type occurred
616
 */
617
void ff_er_add_slice(MpegEncContext *s, int startx, int starty, int endx, int endy, int status){
618
    const int start_i= av_clip(startx + starty * s->mb_width    , 0, s->mb_num-1);
619
    const int end_i  = av_clip(endx   + endy   * s->mb_width    , 0, s->mb_num);
620
    const int start_xy= s->mb_index2xy[start_i];
621
    const int end_xy  = s->mb_index2xy[end_i];
622
    int mask= -1;
623

    
624
    if(s->avctx->hwaccel)
625
        return;
626

    
627
    if(start_i > end_i || start_xy > end_xy){
628
        av_log(s->avctx, AV_LOG_ERROR, "internal error, slice end before start\n");
629
        return;
630
    }
631

    
632
    if(!s->error_recognition) return;
633

    
634
    mask &= ~VP_START;
635
    if(status & (AC_ERROR|AC_END)){
636
        mask &= ~(AC_ERROR|AC_END);
637
        s->error_count -= end_i - start_i + 1;
638
    }
639
    if(status & (DC_ERROR|DC_END)){
640
        mask &= ~(DC_ERROR|DC_END);
641
        s->error_count -= end_i - start_i + 1;
642
    }
643
    if(status & (MV_ERROR|MV_END)){
644
        mask &= ~(MV_ERROR|MV_END);
645
        s->error_count -= end_i - start_i + 1;
646
    }
647

    
648
    if(status & (AC_ERROR|DC_ERROR|MV_ERROR)) s->error_count= INT_MAX;
649

    
650
    if(mask == ~0x7F){
651
        memset(&s->error_status_table[start_xy], 0, (end_xy - start_xy) * sizeof(uint8_t));
652
    }else{
653
        int i;
654
        for(i=start_xy; i<end_xy; i++){
655
            s->error_status_table[ i ] &= mask;
656
        }
657
    }
658

    
659
    if(end_i == s->mb_num)
660
        s->error_count= INT_MAX;
661
    else{
662
        s->error_status_table[end_xy] &= mask;
663
        s->error_status_table[end_xy] |= status;
664
    }
665

    
666
    s->error_status_table[start_xy] |= VP_START;
667

    
668
    if(start_xy > 0 && s->avctx->thread_count <= 1 && s->avctx->skip_top*s->mb_width < start_i){
669
        int prev_status= s->error_status_table[ s->mb_index2xy[start_i - 1] ];
670

    
671
        prev_status &= ~ VP_START;
672
        if(prev_status != (MV_END|DC_END|AC_END)) s->error_count= INT_MAX;
673
    }
674
}
675

    
676
void ff_er_frame_end(MpegEncContext *s){
677
    int i, mb_x, mb_y, error, error_type, dc_error, mv_error, ac_error;
678
    int distance;
679
    int threshold_part[4]= {100,100,100};
680
    int threshold= 50;
681
    int is_intra_likely;
682
    int size = s->b8_stride * 2 * s->mb_height;
683
    Picture *pic= s->current_picture_ptr;
684

    
685
    if(!s->error_recognition || s->error_count==0 || s->avctx->lowres ||
686
       s->avctx->hwaccel ||
687
       s->avctx->codec->capabilities&CODEC_CAP_HWACCEL_VDPAU ||
688
       s->picture_structure != PICT_FRAME || // we dont support ER of field pictures yet, though it should not crash if enabled
689
       s->error_count==3*s->mb_width*(s->avctx->skip_top + s->avctx->skip_bottom)) return;
690

    
691
    if(s->current_picture.motion_val[0] == NULL){
692
        av_log(s->avctx, AV_LOG_ERROR, "Warning MVs not available\n");
693

    
694
        for(i=0; i<2; i++){
695
            pic->ref_index[i]= av_mallocz(size * sizeof(uint8_t));
696
            pic->motion_val_base[i]= av_mallocz((size+4) * 2 * sizeof(uint16_t));
697
            pic->motion_val[i]= pic->motion_val_base[i]+4;
698
        }
699
        pic->motion_subsample_log2= 3;
700
        s->current_picture= *s->current_picture_ptr;
701
    }
702

    
703
    for(i=0; i<2; i++){
704
        if(pic->ref_index[i])
705
            memset(pic->ref_index[i], 0, size * sizeof(uint8_t));
706
    }
707

    
708
    if(s->avctx->debug&FF_DEBUG_ER){
709
        for(mb_y=0; mb_y<s->mb_height; mb_y++){
710
            for(mb_x=0; mb_x<s->mb_width; mb_x++){
711
                int status= s->error_status_table[mb_x + mb_y*s->mb_stride];
712

    
713
                av_log(s->avctx, AV_LOG_DEBUG, "%2X ", status);
714
            }
715
            av_log(s->avctx, AV_LOG_DEBUG, "\n");
716
        }
717
    }
718

    
719
#if 1
720
    /* handle overlapping slices */
721
    for(error_type=1; error_type<=3; error_type++){
722
        int end_ok=0;
723

    
724
        for(i=s->mb_num-1; i>=0; i--){
725
            const int mb_xy= s->mb_index2xy[i];
726
            int error= s->error_status_table[mb_xy];
727

    
728
            if(error&(1<<error_type))
729
                end_ok=1;
730
            if(error&(8<<error_type))
731
                end_ok=1;
732

    
733
            if(!end_ok)
734
                s->error_status_table[mb_xy]|= 1<<error_type;
735

    
736
            if(error&VP_START)
737
                end_ok=0;
738
        }
739
    }
740
#endif
741
#if 1
742
    /* handle slices with partitions of different length */
743
    if(s->partitioned_frame){
744
        int end_ok=0;
745

    
746
        for(i=s->mb_num-1; i>=0; i--){
747
            const int mb_xy= s->mb_index2xy[i];
748
            int error= s->error_status_table[mb_xy];
749

    
750
            if(error&AC_END)
751
                end_ok=0;
752
            if((error&MV_END) || (error&DC_END) || (error&AC_ERROR))
753
                end_ok=1;
754

    
755
            if(!end_ok)
756
                s->error_status_table[mb_xy]|= AC_ERROR;
757

    
758
            if(error&VP_START)
759
                end_ok=0;
760
        }
761
    }
762
#endif
763
    /* handle missing slices */
764
    if(s->error_recognition>=4){
765
        int end_ok=1;
766

    
767
        for(i=s->mb_num-2; i>=s->mb_width+100; i--){ //FIXME +100 hack
768
            const int mb_xy= s->mb_index2xy[i];
769
            int error1= s->error_status_table[mb_xy  ];
770
            int error2= s->error_status_table[s->mb_index2xy[i+1]];
771

    
772
            if(error1&VP_START)
773
                end_ok=1;
774

    
775
            if(   error2==(VP_START|DC_ERROR|AC_ERROR|MV_ERROR|AC_END|DC_END|MV_END)
776
               && error1!=(VP_START|DC_ERROR|AC_ERROR|MV_ERROR|AC_END|DC_END|MV_END)
777
               && ((error1&AC_END) || (error1&DC_END) || (error1&MV_END))){ //end & uninit
778
                end_ok=0;
779
            }
780

    
781
            if(!end_ok)
782
                s->error_status_table[mb_xy]|= DC_ERROR|AC_ERROR|MV_ERROR;
783
        }
784
    }
785

    
786
#if 1
787
    /* backward mark errors */
788
    distance=9999999;
789
    for(error_type=1; error_type<=3; error_type++){
790
        for(i=s->mb_num-1; i>=0; i--){
791
            const int mb_xy= s->mb_index2xy[i];
792
            int error= s->error_status_table[mb_xy];
793

    
794
            if(!s->mbskip_table[mb_xy]) //FIXME partition specific
795
                distance++;
796
            if(error&(1<<error_type))
797
                distance= 0;
798

    
799
            if(s->partitioned_frame){
800
                if(distance < threshold_part[error_type-1])
801
                    s->error_status_table[mb_xy]|= 1<<error_type;
802
            }else{
803
                if(distance < threshold)
804
                    s->error_status_table[mb_xy]|= 1<<error_type;
805
            }
806

    
807
            if(error&VP_START)
808
                distance= 9999999;
809
        }
810
    }
811
#endif
812

    
813
    /* forward mark errors */
814
    error=0;
815
    for(i=0; i<s->mb_num; i++){
816
        const int mb_xy= s->mb_index2xy[i];
817
        int old_error= s->error_status_table[mb_xy];
818

    
819
        if(old_error&VP_START)
820
            error= old_error& (DC_ERROR|AC_ERROR|MV_ERROR);
821
        else{
822
            error|= old_error& (DC_ERROR|AC_ERROR|MV_ERROR);
823
            s->error_status_table[mb_xy]|= error;
824
        }
825
    }
826
#if 1
827
    /* handle not partitioned case */
828
    if(!s->partitioned_frame){
829
        for(i=0; i<s->mb_num; i++){
830
            const int mb_xy= s->mb_index2xy[i];
831
            error= s->error_status_table[mb_xy];
832
            if(error&(AC_ERROR|DC_ERROR|MV_ERROR))
833
                error|= AC_ERROR|DC_ERROR|MV_ERROR;
834
            s->error_status_table[mb_xy]= error;
835
        }
836
    }
837
#endif
838

    
839
    dc_error= ac_error= mv_error=0;
840
    for(i=0; i<s->mb_num; i++){
841
        const int mb_xy= s->mb_index2xy[i];
842
        error= s->error_status_table[mb_xy];
843
        if(error&DC_ERROR) dc_error ++;
844
        if(error&AC_ERROR) ac_error ++;
845
        if(error&MV_ERROR) mv_error ++;
846
    }
847
    av_log(s->avctx, AV_LOG_INFO, "concealing %d DC, %d AC, %d MV errors\n", dc_error, ac_error, mv_error);
848

    
849
    is_intra_likely= is_intra_more_likely(s);
850

    
851
    /* set unknown mb-type to most likely */
852
    for(i=0; i<s->mb_num; i++){
853
        const int mb_xy= s->mb_index2xy[i];
854
        error= s->error_status_table[mb_xy];
855
        if(!((error&DC_ERROR) && (error&MV_ERROR)))
856
            continue;
857

    
858
        if(is_intra_likely)
859
            s->current_picture.mb_type[mb_xy]= MB_TYPE_INTRA4x4;
860
        else
861
            s->current_picture.mb_type[mb_xy]= MB_TYPE_16x16 | MB_TYPE_L0;
862
    }
863

    
864
    // change inter to intra blocks if no reference frames are available
865
    if (!s->last_picture.data[0] && !s->next_picture.data[0])
866
        for(i=0; i<s->mb_num; i++){
867
            const int mb_xy= s->mb_index2xy[i];
868
            if(!IS_INTRA(s->current_picture.mb_type[mb_xy]))
869
                s->current_picture.mb_type[mb_xy]= MB_TYPE_INTRA4x4;
870
        }
871

    
872
    /* handle inter blocks with damaged AC */
873
    for(mb_y=0; mb_y<s->mb_height; mb_y++){
874
        for(mb_x=0; mb_x<s->mb_width; mb_x++){
875
            const int mb_xy= mb_x + mb_y * s->mb_stride;
876
            const int mb_type= s->current_picture.mb_type[mb_xy];
877
            int dir = !s->last_picture.data[0];
878
            error= s->error_status_table[mb_xy];
879

    
880
            if(IS_INTRA(mb_type)) continue; //intra
881
            if(error&MV_ERROR) continue;              //inter with damaged MV
882
            if(!(error&AC_ERROR)) continue;           //undamaged inter
883

    
884
            s->mv_dir = dir ? MV_DIR_BACKWARD : MV_DIR_FORWARD;
885
            s->mb_intra=0;
886
            s->mb_skipped=0;
887
            if(IS_8X8(mb_type)){
888
                int mb_index= mb_x*2 + mb_y*2*s->b8_stride;
889
                int j;
890
                s->mv_type = MV_TYPE_8X8;
891
                for(j=0; j<4; j++){
892
                    s->mv[0][j][0] = s->current_picture.motion_val[dir][ mb_index + (j&1) + (j>>1)*s->b8_stride ][0];
893
                    s->mv[0][j][1] = s->current_picture.motion_val[dir][ mb_index + (j&1) + (j>>1)*s->b8_stride ][1];
894
                }
895
            }else{
896
                s->mv_type = MV_TYPE_16X16;
897
                s->mv[0][0][0] = s->current_picture.motion_val[dir][ mb_x*2 + mb_y*2*s->b8_stride ][0];
898
                s->mv[0][0][1] = s->current_picture.motion_val[dir][ mb_x*2 + mb_y*2*s->b8_stride ][1];
899
            }
900

    
901
            s->dsp.clear_blocks(s->block[0]);
902

    
903
            s->mb_x= mb_x;
904
            s->mb_y= mb_y;
905
            decode_mb(s);
906
        }
907
    }
908

    
909
    /* guess MVs */
910
    if(s->pict_type==FF_B_TYPE){
911
        for(mb_y=0; mb_y<s->mb_height; mb_y++){
912
            for(mb_x=0; mb_x<s->mb_width; mb_x++){
913
                int xy= mb_x*2 + mb_y*2*s->b8_stride;
914
                const int mb_xy= mb_x + mb_y * s->mb_stride;
915
                const int mb_type= s->current_picture.mb_type[mb_xy];
916
                error= s->error_status_table[mb_xy];
917

    
918
                if(IS_INTRA(mb_type)) continue;
919
                if(!(error&MV_ERROR)) continue;           //inter with undamaged MV
920
                if(!(error&AC_ERROR)) continue;           //undamaged inter
921

    
922
                s->mv_dir = MV_DIR_FORWARD|MV_DIR_BACKWARD;
923
                if(!s->last_picture.data[0]) s->mv_dir &= ~MV_DIR_FORWARD;
924
                if(!s->next_picture.data[0]) s->mv_dir &= ~MV_DIR_BACKWARD;
925
                s->mb_intra=0;
926
                s->mv_type = MV_TYPE_16X16;
927
                s->mb_skipped=0;
928

    
929
                if(s->pp_time){
930
                    int time_pp= s->pp_time;
931
                    int time_pb= s->pb_time;
932

    
933
                    s->mv[0][0][0] = s->next_picture.motion_val[0][xy][0]*time_pb/time_pp;
934
                    s->mv[0][0][1] = s->next_picture.motion_val[0][xy][1]*time_pb/time_pp;
935
                    s->mv[1][0][0] = s->next_picture.motion_val[0][xy][0]*(time_pb - time_pp)/time_pp;
936
                    s->mv[1][0][1] = s->next_picture.motion_val[0][xy][1]*(time_pb - time_pp)/time_pp;
937
                }else{
938
                    s->mv[0][0][0]= 0;
939
                    s->mv[0][0][1]= 0;
940
                    s->mv[1][0][0]= 0;
941
                    s->mv[1][0][1]= 0;
942
                }
943

    
944
                s->dsp.clear_blocks(s->block[0]);
945
                s->mb_x= mb_x;
946
                s->mb_y= mb_y;
947
                decode_mb(s);
948
            }
949
        }
950
    }else
951
        guess_mv(s);
952

    
953
    /* the filters below are not XvMC compatible, skip them */
954
    if(CONFIG_MPEG_XVMC_DECODER && s->avctx->xvmc_acceleration)
955
        goto ec_clean;
956
    /* fill DC for inter blocks */
957
    for(mb_y=0; mb_y<s->mb_height; mb_y++){
958
        for(mb_x=0; mb_x<s->mb_width; mb_x++){
959
            int dc, dcu, dcv, y, n;
960
            int16_t *dc_ptr;
961
            uint8_t *dest_y, *dest_cb, *dest_cr;
962
            const int mb_xy= mb_x + mb_y * s->mb_stride;
963
            const int mb_type= s->current_picture.mb_type[mb_xy];
964

    
965
            error= s->error_status_table[mb_xy];
966

    
967
            if(IS_INTRA(mb_type) && s->partitioned_frame) continue;
968
//            if(error&MV_ERROR) continue; //inter data damaged FIXME is this good?
969

    
970
            dest_y = s->current_picture.data[0] + mb_x*16 + mb_y*16*s->linesize;
971
            dest_cb= s->current_picture.data[1] + mb_x*8  + mb_y*8 *s->uvlinesize;
972
            dest_cr= s->current_picture.data[2] + mb_x*8  + mb_y*8 *s->uvlinesize;
973

    
974
            dc_ptr= &s->dc_val[0][mb_x*2 + mb_y*2*s->b8_stride];
975
            for(n=0; n<4; n++){
976
                dc=0;
977
                for(y=0; y<8; y++){
978
                    int x;
979
                    for(x=0; x<8; x++){
980
                       dc+= dest_y[x + (n&1)*8 + (y + (n>>1)*8)*s->linesize];
981
                    }
982
                }
983
                dc_ptr[(n&1) + (n>>1)*s->b8_stride]= (dc+4)>>3;
984
            }
985

    
986
            dcu=dcv=0;
987
            for(y=0; y<8; y++){
988
                int x;
989
                for(x=0; x<8; x++){
990
                    dcu+=dest_cb[x + y*(s->uvlinesize)];
991
                    dcv+=dest_cr[x + y*(s->uvlinesize)];
992
                }
993
            }
994
            s->dc_val[1][mb_x + mb_y*s->mb_stride]= (dcu+4)>>3;
995
            s->dc_val[2][mb_x + mb_y*s->mb_stride]= (dcv+4)>>3;
996
        }
997
    }
998
#if 1
999
    /* guess DC for damaged blocks */
1000
    guess_dc(s, s->dc_val[0], s->mb_width*2, s->mb_height*2, s->b8_stride, 1);
1001
    guess_dc(s, s->dc_val[1], s->mb_width  , s->mb_height  , s->mb_stride, 0);
1002
    guess_dc(s, s->dc_val[2], s->mb_width  , s->mb_height  , s->mb_stride, 0);
1003
#endif
1004
    /* filter luma DC */
1005
    filter181(s->dc_val[0], s->mb_width*2, s->mb_height*2, s->b8_stride);
1006

    
1007
#if 1
1008
    /* render DC only intra */
1009
    for(mb_y=0; mb_y<s->mb_height; mb_y++){
1010
        for(mb_x=0; mb_x<s->mb_width; mb_x++){
1011
            uint8_t *dest_y, *dest_cb, *dest_cr;
1012
            const int mb_xy= mb_x + mb_y * s->mb_stride;
1013
            const int mb_type= s->current_picture.mb_type[mb_xy];
1014

    
1015
            error= s->error_status_table[mb_xy];
1016

    
1017
            if(IS_INTER(mb_type)) continue;
1018
            if(!(error&AC_ERROR)) continue;              //undamaged
1019

    
1020
            dest_y = s->current_picture.data[0] + mb_x*16 + mb_y*16*s->linesize;
1021
            dest_cb= s->current_picture.data[1] + mb_x*8  + mb_y*8 *s->uvlinesize;
1022
            dest_cr= s->current_picture.data[2] + mb_x*8  + mb_y*8 *s->uvlinesize;
1023

    
1024
            put_dc(s, dest_y, dest_cb, dest_cr, mb_x, mb_y);
1025
        }
1026
    }
1027
#endif
1028

    
1029
    if(s->avctx->error_concealment&FF_EC_DEBLOCK){
1030
        /* filter horizontal block boundaries */
1031
        h_block_filter(s, s->current_picture.data[0], s->mb_width*2, s->mb_height*2, s->linesize  , 1);
1032
        h_block_filter(s, s->current_picture.data[1], s->mb_width  , s->mb_height  , s->uvlinesize, 0);
1033
        h_block_filter(s, s->current_picture.data[2], s->mb_width  , s->mb_height  , s->uvlinesize, 0);
1034

    
1035
        /* filter vertical block boundaries */
1036
        v_block_filter(s, s->current_picture.data[0], s->mb_width*2, s->mb_height*2, s->linesize  , 1);
1037
        v_block_filter(s, s->current_picture.data[1], s->mb_width  , s->mb_height  , s->uvlinesize, 0);
1038
        v_block_filter(s, s->current_picture.data[2], s->mb_width  , s->mb_height  , s->uvlinesize, 0);
1039
    }
1040

    
1041
ec_clean:
1042
    /* clean a few tables */
1043
    for(i=0; i<s->mb_num; i++){
1044
        const int mb_xy= s->mb_index2xy[i];
1045
        int error= s->error_status_table[mb_xy];
1046

    
1047
        if(s->pict_type!=FF_B_TYPE && (error&(DC_ERROR|MV_ERROR|AC_ERROR))){
1048
            s->mbskip_table[mb_xy]=0;
1049
        }
1050
        s->mbintra_table[mb_xy]=1;
1051
    }
1052
}