yading@10: /*
yading@10:  * Error resilience / concealment
yading@10:  *
yading@10:  * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
yading@10:  *
yading@10:  * This file is part of FFmpeg.
yading@10:  *
yading@10:  * FFmpeg is free software; you can redistribute it and/or
yading@10:  * modify it under the terms of the GNU Lesser General Public
yading@10:  * License as published by the Free Software Foundation; either
yading@10:  * version 2.1 of the License, or (at your option) any later version.
yading@10:  *
yading@10:  * FFmpeg is distributed in the hope that it will be useful,
yading@10:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
yading@10:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
yading@10:  * Lesser General Public License for more details.
yading@10:  *
yading@10:  * You should have received a copy of the GNU Lesser General Public
yading@10:  * License along with FFmpeg; if not, write to the Free Software
yading@10:  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
yading@10:  */
yading@10: 
yading@10: /**
yading@10:  * @file
yading@10:  * Error resilience / concealment.
yading@10:  */
yading@10: 
yading@10: #include <limits.h>
yading@10: 
yading@10: #include "avcodec.h"
yading@10: #include "error_resilience.h"
yading@10: #include "mpegvideo.h"
yading@10: #include "rectangle.h"
yading@10: #include "thread.h"
yading@10: 
yading@10: /**
yading@10:  * @param stride the number of MVs to get to the next row
yading@10:  * @param mv_step the number of MVs per row or column in a macroblock
yading@10:  */
yading@10: static void set_mv_strides(ERContext *s, int *mv_step, int *stride)
yading@10: {
yading@10:     if (s->avctx->codec_id == AV_CODEC_ID_H264) {
yading@10:         av_assert0(s->quarter_sample);
yading@10:         *mv_step = 4;
yading@10:         *stride  = s->mb_width * 4;
yading@10:     } else {
yading@10:         *mv_step = 2;
yading@10:         *stride  = s->b8_stride;
yading@10:     }
yading@10: }
yading@10: 
yading@10: /**
yading@10:  * Replace the current MB with a flat dc-only version.
yading@10:  */
yading@10: static void put_dc(ERContext *s, uint8_t *dest_y, uint8_t *dest_cb,
yading@10:                    uint8_t *dest_cr, int mb_x, int mb_y)
yading@10: {
yading@10:     int *linesize = s->cur_pic->f.linesize;
yading@10:     int dc, dcu, dcv, y, i;
yading@10:     for (i = 0; i < 4; i++) {
yading@10:         dc = s->dc_val[0][mb_x * 2 + (i &  1) + (mb_y * 2 + (i >> 1)) * s->b8_stride];
yading@10:         if (dc < 0)
yading@10:             dc = 0;
yading@10:         else if (dc > 2040)
yading@10:             dc = 2040;
yading@10:         for (y = 0; y < 8; y++) {
yading@10:             int x;
yading@10:             for (x = 0; x < 8; x++)
yading@10:                 dest_y[x + (i &  1) * 8 + (y + (i >> 1) * 8) * linesize[0]] = dc / 8;
yading@10:         }
yading@10:     }
yading@10:     dcu = s->dc_val[1][mb_x + mb_y * s->mb_stride];
yading@10:     dcv = s->dc_val[2][mb_x + mb_y * s->mb_stride];
yading@10:     if (dcu < 0)
yading@10:         dcu = 0;
yading@10:     else if (dcu > 2040)
yading@10:         dcu = 2040;
yading@10:     if (dcv < 0)
yading@10:         dcv = 0;
yading@10:     else if (dcv > 2040)
yading@10:         dcv = 2040;
yading@10:     for (y = 0; y < 8; y++) {
yading@10:         int x;
yading@10:         for (x = 0; x < 8; x++) {
yading@10:             dest_cb[x + y * linesize[1]] = dcu / 8;
yading@10:             dest_cr[x + y * linesize[2]] = dcv / 8;
yading@10:         }
yading@10:     }
yading@10: }
yading@10: 
yading@10: static void filter181(int16_t *data, int width, int height, int stride)
yading@10: {
yading@10:     int x, y;
yading@10: 
yading@10:     /* horizontal filter */
yading@10:     for (y = 1; y < height - 1; y++) {
yading@10:         int prev_dc = data[0 + y * stride];
yading@10: 
yading@10:         for (x = 1; x < width - 1; x++) {
yading@10:             int dc;
yading@10:             dc = -prev_dc +
yading@10:                  data[x     + y * stride] * 8 -
yading@10:                  data[x + 1 + y * stride];
yading@10:             dc = (dc * 10923 + 32768) >> 16;
yading@10:             prev_dc = data[x + y * stride];
yading@10:             data[x + y * stride] = dc;
yading@10:         }
yading@10:     }
yading@10: 
yading@10:     /* vertical filter */
yading@10:     for (x = 1; x < width - 1; x++) {
yading@10:         int prev_dc = data[x];
yading@10: 
yading@10:         for (y = 1; y < height - 1; y++) {
yading@10:             int dc;
yading@10: 
yading@10:             dc = -prev_dc +
yading@10:                  data[x +  y      * stride] * 8 -
yading@10:                  data[x + (y + 1) * stride];
yading@10:             dc = (dc * 10923 + 32768) >> 16;
yading@10:             prev_dc = data[x + y * stride];
yading@10:             data[x + y * stride] = dc;
yading@10:         }
yading@10:     }
yading@10: }
yading@10: 
yading@10: /**
yading@10:  * guess the dc of blocks which do not have an undamaged dc
yading@10:  * @param w     width in 8 pixel blocks
yading@10:  * @param h     height in 8 pixel blocks
yading@10:  */
yading@10: static void guess_dc(ERContext *s, int16_t *dc, int w,
yading@10:                      int h, int stride, int is_luma)
yading@10: {
yading@10:     int b_x, b_y;
yading@10:     int16_t  (*col )[4] = av_malloc(stride*h*sizeof( int16_t)*4);
yading@10:     uint32_t (*dist)[4] = av_malloc(stride*h*sizeof(uint32_t)*4);
yading@10: 
yading@10:     if(!col || !dist) {
yading@10:         av_log(s->avctx, AV_LOG_ERROR, "guess_dc() is out of memory\n");
yading@10:         goto fail;
yading@10:     }
yading@10: 
yading@10:     for(b_y=0; b_y<h; b_y++){
yading@10:         int color= 1024;
yading@10:         int distance= -1;
yading@10:         for(b_x=0; b_x<w; b_x++){
yading@10:             int mb_index_j= (b_x>>is_luma) + (b_y>>is_luma)*s->mb_stride;
yading@10:             int error_j= s->error_status_table[mb_index_j];
yading@10:             int intra_j = IS_INTRA(s->cur_pic->mb_type[mb_index_j]);
yading@10:             if(intra_j==0 || !(error_j&ER_DC_ERROR)){
yading@10:                 color= dc[b_x + b_y*stride];
yading@10:                 distance= b_x;
yading@10:             }
yading@10:             col [b_x + b_y*stride][1]= color;
yading@10:             dist[b_x + b_y*stride][1]= distance >= 0 ? b_x-distance : 9999;
yading@10:         }
yading@10:         color= 1024;
yading@10:         distance= -1;
yading@10:         for(b_x=w-1; b_x>=0; b_x--){
yading@10:             int mb_index_j= (b_x>>is_luma) + (b_y>>is_luma)*s->mb_stride;
yading@10:             int error_j= s->error_status_table[mb_index_j];
yading@10:             int intra_j = IS_INTRA(s->cur_pic->mb_type[mb_index_j]);
yading@10:             if(intra_j==0 || !(error_j&ER_DC_ERROR)){
yading@10:                 color= dc[b_x + b_y*stride];
yading@10:                 distance= b_x;
yading@10:             }
yading@10:             col [b_x + b_y*stride][0]= color;
yading@10:             dist[b_x + b_y*stride][0]= distance >= 0 ? distance-b_x : 9999;
yading@10:         }
yading@10:     }
yading@10:     for(b_x=0; b_x<w; b_x++){
yading@10:         int color= 1024;
yading@10:         int distance= -1;
yading@10:         for(b_y=0; b_y<h; b_y++){
yading@10:             int mb_index_j= (b_x>>is_luma) + (b_y>>is_luma)*s->mb_stride;
yading@10:             int error_j= s->error_status_table[mb_index_j];
yading@10:             int intra_j = IS_INTRA(s->cur_pic->mb_type[mb_index_j]);
yading@10:             if(intra_j==0 || !(error_j&ER_DC_ERROR)){
yading@10:                 color= dc[b_x + b_y*stride];
yading@10:                 distance= b_y;
yading@10:             }
yading@10:             col [b_x + b_y*stride][3]= color;
yading@10:             dist[b_x + b_y*stride][3]= distance >= 0 ? b_y-distance : 9999;
yading@10:         }
yading@10:         color= 1024;
yading@10:         distance= -1;
yading@10:         for(b_y=h-1; b_y>=0; b_y--){
yading@10:             int mb_index_j= (b_x>>is_luma) + (b_y>>is_luma)*s->mb_stride;
yading@10:             int error_j= s->error_status_table[mb_index_j];
yading@10:             int intra_j = IS_INTRA(s->cur_pic->mb_type[mb_index_j]);
yading@10:             if(intra_j==0 || !(error_j&ER_DC_ERROR)){
yading@10:                 color= dc[b_x + b_y*stride];
yading@10:                 distance= b_y;
yading@10:             }
yading@10:             col [b_x + b_y*stride][2]= color;
yading@10:             dist[b_x + b_y*stride][2]= distance >= 0 ? distance-b_y : 9999;
yading@10:         }
yading@10:     }
yading@10: 
yading@10:     for (b_y = 0; b_y < h; b_y++) {
yading@10:         for (b_x = 0; b_x < w; b_x++) {
yading@10:             int mb_index, error, j;
yading@10:             int64_t guess, weight_sum;
yading@10:             mb_index = (b_x >> is_luma) + (b_y >> is_luma) * s->mb_stride;
yading@10:             error    = s->error_status_table[mb_index];
yading@10: 
yading@10:             if (IS_INTER(s->cur_pic->mb_type[mb_index]))
yading@10:                 continue; // inter
yading@10:             if (!(error & ER_DC_ERROR))
yading@10:                 continue; // dc-ok
yading@10: 
yading@10:             weight_sum = 0;
yading@10:             guess      = 0;
yading@10:             for (j = 0; j < 4; j++) {
yading@10:                 int64_t weight  = 256 * 256 * 256 * 16 / FFMAX(dist[b_x + b_y*stride][j], 1);
yading@10:                 guess          += weight*(int64_t)col[b_x + b_y*stride][j];
yading@10:                 weight_sum     += weight;
yading@10:             }
yading@10:             guess = (guess + weight_sum / 2) / weight_sum;
yading@10:             dc[b_x + b_y * stride] = guess;
yading@10:         }
yading@10:     }
yading@10: 
yading@10: fail:
yading@10:     av_freep(&col);
yading@10:     av_freep(&dist);
yading@10: }
yading@10: 
yading@10: /**
yading@10:  * simple horizontal deblocking filter used for error resilience
yading@10:  * @param w     width in 8 pixel blocks
yading@10:  * @param h     height in 8 pixel blocks
yading@10:  */
yading@10: static void h_block_filter(ERContext *s, uint8_t *dst, int w,
yading@10:                            int h, int stride, int is_luma)
yading@10: {
yading@10:     int b_x, b_y, mvx_stride, mvy_stride;
yading@10:     const uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
yading@10:     set_mv_strides(s, &mvx_stride, &mvy_stride);
yading@10:     mvx_stride >>= is_luma;
yading@10:     mvy_stride *= mvx_stride;
yading@10: 
yading@10:     for (b_y = 0; b_y < h; b_y++) {
yading@10:         for (b_x = 0; b_x < w - 1; b_x++) {
yading@10:             int y;
yading@10:             int left_status  = s->error_status_table[( b_x      >> is_luma) + (b_y >> is_luma) * s->mb_stride];
yading@10:             int right_status = s->error_status_table[((b_x + 1) >> is_luma) + (b_y >> is_luma) * s->mb_stride];
yading@10:             int left_intra   = IS_INTRA(s->cur_pic->mb_type[( b_x      >> is_luma) + (b_y >> is_luma) * s->mb_stride]);
yading@10:             int right_intra  = IS_INTRA(s->cur_pic->mb_type[((b_x + 1) >> is_luma) + (b_y >> is_luma) * s->mb_stride]);
yading@10:             int left_damage  = left_status & ER_MB_ERROR;
yading@10:             int right_damage = right_status & ER_MB_ERROR;
yading@10:             int offset       = b_x * 8 + b_y * stride * 8;
yading@10:             int16_t *left_mv  = s->cur_pic->motion_val[0][mvy_stride * b_y + mvx_stride *  b_x];
yading@10:             int16_t *right_mv = s->cur_pic->motion_val[0][mvy_stride * b_y + mvx_stride * (b_x + 1)];
yading@10:             if (!(left_damage || right_damage))
yading@10:                 continue; // both undamaged
yading@10:             if ((!left_intra) && (!right_intra) &&
yading@10:                 FFABS(left_mv[0] - right_mv[0]) +
yading@10:                 FFABS(left_mv[1] + right_mv[1]) < 2)
yading@10:                 continue;
yading@10: 
yading@10:             for (y = 0; y < 8; y++) {
yading@10:                 int a, b, c, d;
yading@10: 
yading@10:                 a = dst[offset + 7 + y * stride] - dst[offset + 6 + y * stride];
yading@10:                 b = dst[offset + 8 + y * stride] - dst[offset + 7 + y * stride];
yading@10:                 c = dst[offset + 9 + y * stride] - dst[offset + 8 + y * stride];
yading@10: 
yading@10:                 d = FFABS(b) - ((FFABS(a) + FFABS(c) + 1) >> 1);
yading@10:                 d = FFMAX(d, 0);
yading@10:                 if (b < 0)
yading@10:                     d = -d;
yading@10: 
yading@10:                 if (d == 0)
yading@10:                     continue;
yading@10: 
yading@10:                 if (!(left_damage && right_damage))
yading@10:                     d = d * 16 / 9;
yading@10: 
yading@10:                 if (left_damage) {
yading@10:                     dst[offset + 7 + y * stride] = cm[dst[offset + 7 + y * stride] + ((d * 7) >> 4)];
yading@10:                     dst[offset + 6 + y * stride] = cm[dst[offset + 6 + y * stride] + ((d * 5) >> 4)];
yading@10:                     dst[offset + 5 + y * stride] = cm[dst[offset + 5 + y * stride] + ((d * 3) >> 4)];
yading@10:                     dst[offset + 4 + y * stride] = cm[dst[offset + 4 + y * stride] + ((d * 1) >> 4)];
yading@10:                 }
yading@10:                 if (right_damage) {
yading@10:                     dst[offset + 8 + y * stride] = cm[dst[offset +  8 + y * stride] - ((d * 7) >> 4)];
yading@10:                     dst[offset + 9 + y * stride] = cm[dst[offset +  9 + y * stride] - ((d * 5) >> 4)];
yading@10:                     dst[offset + 10+ y * stride] = cm[dst[offset + 10 + y * stride] - ((d * 3) >> 4)];
yading@10:                     dst[offset + 11+ y * stride] = cm[dst[offset + 11 + y * stride] - ((d * 1) >> 4)];
yading@10:                 }
yading@10:             }
yading@10:         }
yading@10:     }
yading@10: }
yading@10: 
yading@10: /**
yading@10:  * simple vertical deblocking filter used for error resilience
yading@10:  * @param w     width in 8 pixel blocks
yading@10:  * @param h     height in 8 pixel blocks
yading@10:  */
yading@10: static void v_block_filter(ERContext *s, uint8_t *dst, int w, int h,
yading@10:                            int stride, int is_luma)
yading@10: {
yading@10:     int b_x, b_y, mvx_stride, mvy_stride;
yading@10:     const uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
yading@10:     set_mv_strides(s, &mvx_stride, &mvy_stride);
yading@10:     mvx_stride >>= is_luma;
yading@10:     mvy_stride *= mvx_stride;
yading@10: 
yading@10:     for (b_y = 0; b_y < h - 1; b_y++) {
yading@10:         for (b_x = 0; b_x < w; b_x++) {
yading@10:             int x;
yading@10:             int top_status    = s->error_status_table[(b_x >> is_luma) +  (b_y      >> is_luma) * s->mb_stride];
yading@10:             int bottom_status = s->error_status_table[(b_x >> is_luma) + ((b_y + 1) >> is_luma) * s->mb_stride];
yading@10:             int top_intra     = IS_INTRA(s->cur_pic->mb_type[(b_x >> is_luma) + ( b_y      >> is_luma) * s->mb_stride]);
yading@10:             int bottom_intra  = IS_INTRA(s->cur_pic->mb_type[(b_x >> is_luma) + ((b_y + 1) >> is_luma) * s->mb_stride]);
yading@10:             int top_damage    = top_status & ER_MB_ERROR;
yading@10:             int bottom_damage = bottom_status & ER_MB_ERROR;
yading@10:             int offset        = b_x * 8 + b_y * stride * 8;
yading@10: 
yading@10:             int16_t *top_mv    = s->cur_pic->motion_val[0][mvy_stride *  b_y      + mvx_stride * b_x];
yading@10:             int16_t *bottom_mv = s->cur_pic->motion_val[0][mvy_stride * (b_y + 1) + mvx_stride * b_x];
yading@10: 
yading@10:             if (!(top_damage || bottom_damage))
yading@10:                 continue; // both undamaged
yading@10: 
yading@10:             if ((!top_intra) && (!bottom_intra) &&
yading@10:                 FFABS(top_mv[0] - bottom_mv[0]) +
yading@10:                 FFABS(top_mv[1] + bottom_mv[1]) < 2)
yading@10:                 continue;
yading@10: 
yading@10:             for (x = 0; x < 8; x++) {
yading@10:                 int a, b, c, d;
yading@10: 
yading@10:                 a = dst[offset + x + 7 * stride] - dst[offset + x + 6 * stride];
yading@10:                 b = dst[offset + x + 8 * stride] - dst[offset + x + 7 * stride];
yading@10:                 c = dst[offset + x + 9 * stride] - dst[offset + x + 8 * stride];
yading@10: 
yading@10:                 d = FFABS(b) - ((FFABS(a) + FFABS(c) + 1) >> 1);
yading@10:                 d = FFMAX(d, 0);
yading@10:                 if (b < 0)
yading@10:                     d = -d;
yading@10: 
yading@10:                 if (d == 0)
yading@10:                     continue;
yading@10: 
yading@10:                 if (!(top_damage && bottom_damage))
yading@10:                     d = d * 16 / 9;
yading@10: 
yading@10:                 if (top_damage) {
yading@10:                     dst[offset + x +  7 * stride] = cm[dst[offset + x +  7 * stride] + ((d * 7) >> 4)];
yading@10:                     dst[offset + x +  6 * stride] = cm[dst[offset + x +  6 * stride] + ((d * 5) >> 4)];
yading@10:                     dst[offset + x +  5 * stride] = cm[dst[offset + x +  5 * stride] + ((d * 3) >> 4)];
yading@10:                     dst[offset + x +  4 * stride] = cm[dst[offset + x +  4 * stride] + ((d * 1) >> 4)];
yading@10:                 }
yading@10:                 if (bottom_damage) {
yading@10:                     dst[offset + x +  8 * stride] = cm[dst[offset + x +  8 * stride] - ((d * 7) >> 4)];
yading@10:                     dst[offset + x +  9 * stride] = cm[dst[offset + x +  9 * stride] - ((d * 5) >> 4)];
yading@10:                     dst[offset + x + 10 * stride] = cm[dst[offset + x + 10 * stride] - ((d * 3) >> 4)];
yading@10:                     dst[offset + x + 11 * stride] = cm[dst[offset + x + 11 * stride] - ((d * 1) >> 4)];
yading@10:                 }
yading@10:             }
yading@10:         }
yading@10:     }
yading@10: }
yading@10: 
yading@10: static void guess_mv(ERContext *s)
yading@10: {
yading@10:     uint8_t *fixed = s->er_temp_buffer;
yading@10: #define MV_FROZEN    3
yading@10: #define MV_CHANGED   2
yading@10: #define MV_UNCHANGED 1
yading@10:     const int mb_stride = s->mb_stride;
yading@10:     const int mb_width  = s->mb_width;
yading@10:     const int mb_height = s->mb_height;
yading@10:     int i, depth, num_avail;
yading@10:     int mb_x, mb_y, mot_step, mot_stride;
yading@10: 
yading@10:     set_mv_strides(s, &mot_step, &mot_stride);
yading@10: 
yading@10:     num_avail = 0;
yading@10:     for (i = 0; i < s->mb_num; i++) {
yading@10:         const int mb_xy = s->mb_index2xy[i];
yading@10:         int f = 0;
yading@10:         int error = s->error_status_table[mb_xy];
yading@10: 
yading@10:         if (IS_INTRA(s->cur_pic->mb_type[mb_xy]))
yading@10:             f = MV_FROZEN; // intra // FIXME check
yading@10:         if (!(error & ER_MV_ERROR))
yading@10:             f = MV_FROZEN; // inter with undamaged MV
yading@10: 
yading@10:         fixed[mb_xy] = f;
yading@10:         if (f == MV_FROZEN)
yading@10:             num_avail++;
yading@10:         else if(s->last_pic->f.data[0] && s->last_pic->motion_val[0]){
yading@10:             const int mb_y= mb_xy / s->mb_stride;
yading@10:             const int mb_x= mb_xy % s->mb_stride;
yading@10:             const int mot_index= (mb_x + mb_y*mot_stride) * mot_step;
yading@10:             s->cur_pic->motion_val[0][mot_index][0]= s->last_pic->motion_val[0][mot_index][0];
yading@10:             s->cur_pic->motion_val[0][mot_index][1]= s->last_pic->motion_val[0][mot_index][1];
yading@10:             s->cur_pic->ref_index[0][4*mb_xy]      = s->last_pic->ref_index[0][4*mb_xy];
yading@10:         }
yading@10:     }
yading@10: 
yading@10:     if ((!(s->avctx->error_concealment&FF_EC_GUESS_MVS)) ||
yading@10:         num_avail <= mb_width / 2) {
yading@10:         for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
yading@10:             for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
yading@10:                 const int mb_xy = mb_x + mb_y * s->mb_stride;
yading@10:                 int mv_dir = (s->last_pic && s->last_pic->f.data[0]) ? MV_DIR_FORWARD : MV_DIR_BACKWARD;
yading@10: 
yading@10:                 if (IS_INTRA(s->cur_pic->mb_type[mb_xy]))
yading@10:                     continue;
yading@10:                 if (!(s->error_status_table[mb_xy] & ER_MV_ERROR))
yading@10:                     continue;
yading@10: 
yading@10:                 s->mv[0][0][0] = 0;
yading@10:                 s->mv[0][0][1] = 0;
yading@10:                 s->decode_mb(s->opaque, 0, mv_dir, MV_TYPE_16X16, &s->mv,
yading@10:                              mb_x, mb_y, 0, 0);
yading@10:             }
yading@10:         }
yading@10:         return;
yading@10:     }
yading@10: 
yading@10:     for (depth = 0; ; depth++) {
yading@10:         int changed, pass, none_left;
yading@10: 
yading@10:         none_left = 1;
yading@10:         changed   = 1;
yading@10:         for (pass = 0; (changed || pass < 2) && pass < 10; pass++) {
yading@10:             int mb_x, mb_y;
yading@10:             int score_sum = 0;
yading@10: 
yading@10:             changed = 0;
yading@10:             for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
yading@10:                 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
yading@10:                     const int mb_xy        = mb_x + mb_y * s->mb_stride;
yading@10:                     int mv_predictor[8][2] = { { 0 } };
yading@10:                     int ref[8]             = { 0 };
yading@10:                     int pred_count         = 0;
yading@10:                     int j;
yading@10:                     int best_score         = 256 * 256 * 256 * 64;
yading@10:                     int best_pred          = 0;
yading@10:                     const int mot_index    = (mb_x + mb_y * mot_stride) * mot_step;
yading@10:                     int prev_x, prev_y, prev_ref;
yading@10: 
yading@10:                     if ((mb_x ^ mb_y ^ pass) & 1)
yading@10:                         continue;
yading@10: 
yading@10:                     if (fixed[mb_xy] == MV_FROZEN)
yading@10:                         continue;
yading@10:                     av_assert1(!IS_INTRA(s->cur_pic->mb_type[mb_xy]));
yading@10:                     av_assert1(s->last_pic && s->last_pic->f.data[0]);
yading@10: 
yading@10:                     j = 0;
yading@10:                     if (mb_x > 0             && fixed[mb_xy - 1]         == MV_FROZEN)
yading@10:                         j = 1;
yading@10:                     if (mb_x + 1 < mb_width  && fixed[mb_xy + 1]         == MV_FROZEN)
yading@10:                         j = 1;
yading@10:                     if (mb_y > 0             && fixed[mb_xy - mb_stride] == MV_FROZEN)
yading@10:                         j = 1;
yading@10:                     if (mb_y + 1 < mb_height && fixed[mb_xy + mb_stride] == MV_FROZEN)
yading@10:                         j = 1;
yading@10:                     if (j == 0)
yading@10:                         continue;
yading@10: 
yading@10:                     j = 0;
yading@10:                     if (mb_x > 0             && fixed[mb_xy - 1        ] == MV_CHANGED)
yading@10:                         j = 1;
yading@10:                     if (mb_x + 1 < mb_width  && fixed[mb_xy + 1        ] == MV_CHANGED)
yading@10:                         j = 1;
yading@10:                     if (mb_y > 0             && fixed[mb_xy - mb_stride] == MV_CHANGED)
yading@10:                         j = 1;
yading@10:                     if (mb_y + 1 < mb_height && fixed[mb_xy + mb_stride] == MV_CHANGED)
yading@10:                         j = 1;
yading@10:                     if (j == 0 && pass > 1)
yading@10:                         continue;
yading@10: 
yading@10:                     none_left = 0;
yading@10: 
yading@10:                     if (mb_x > 0 && fixed[mb_xy - 1]) {
yading@10:                         mv_predictor[pred_count][0] =
yading@10:                             s->cur_pic->motion_val[0][mot_index - mot_step][0];
yading@10:                         mv_predictor[pred_count][1] =
yading@10:                             s->cur_pic->motion_val[0][mot_index - mot_step][1];
yading@10:                         ref[pred_count] =
yading@10:                             s->cur_pic->ref_index[0][4 * (mb_xy - 1)];
yading@10:                         pred_count++;
yading@10:                     }
yading@10:                     if (mb_x + 1 < mb_width && fixed[mb_xy + 1]) {
yading@10:                         mv_predictor[pred_count][0] =
yading@10:                             s->cur_pic->motion_val[0][mot_index + mot_step][0];
yading@10:                         mv_predictor[pred_count][1] =
yading@10:                             s->cur_pic->motion_val[0][mot_index + mot_step][1];
yading@10:                         ref[pred_count] =
yading@10:                             s->cur_pic->ref_index[0][4 * (mb_xy + 1)];
yading@10:                         pred_count++;
yading@10:                     }
yading@10:                     if (mb_y > 0 && fixed[mb_xy - mb_stride]) {
yading@10:                         mv_predictor[pred_count][0] =
yading@10:                             s->cur_pic->motion_val[0][mot_index - mot_stride * mot_step][0];
yading@10:                         mv_predictor[pred_count][1] =
yading@10:                             s->cur_pic->motion_val[0][mot_index - mot_stride * mot_step][1];
yading@10:                         ref[pred_count] =
yading@10:                             s->cur_pic->ref_index[0][4 * (mb_xy - s->mb_stride)];
yading@10:                         pred_count++;
yading@10:                     }
yading@10:                     if (mb_y + 1<mb_height && fixed[mb_xy + mb_stride]) {
yading@10:                         mv_predictor[pred_count][0] =
yading@10:                             s->cur_pic->motion_val[0][mot_index + mot_stride * mot_step][0];
yading@10:                         mv_predictor[pred_count][1] =
yading@10:                             s->cur_pic->motion_val[0][mot_index + mot_stride * mot_step][1];
yading@10:                         ref[pred_count] =
yading@10:                             s->cur_pic->ref_index[0][4 * (mb_xy + s->mb_stride)];
yading@10:                         pred_count++;
yading@10:                     }
yading@10:                     if (pred_count == 0)
yading@10:                         continue;
yading@10: 
yading@10:                     if (pred_count > 1) {
yading@10:                         int sum_x = 0, sum_y = 0, sum_r = 0;
yading@10:                         int max_x, max_y, min_x, min_y, max_r, min_r;
yading@10: 
yading@10:                         for (j = 0; j < pred_count; j++) {
yading@10:                             sum_x += mv_predictor[j][0];
yading@10:                             sum_y += mv_predictor[j][1];
yading@10:                             sum_r += ref[j];
yading@10:                             if (j && ref[j] != ref[j - 1])
yading@10:                                 goto skip_mean_and_median;
yading@10:                         }
yading@10: 
yading@10:                         /* mean */
yading@10:                         mv_predictor[pred_count][0] = sum_x / j;
yading@10:                         mv_predictor[pred_count][1] = sum_y / j;
yading@10:                                  ref[pred_count]    = sum_r / j;
yading@10: 
yading@10:                         /* median */
yading@10:                         if (pred_count >= 3) {
yading@10:                             min_y = min_x = min_r =  99999;
yading@10:                             max_y = max_x = max_r = -99999;
yading@10:                         } else {
yading@10:                             min_x = min_y = max_x = max_y = min_r = max_r = 0;
yading@10:                         }
yading@10:                         for (j = 0; j < pred_count; j++) {
yading@10:                             max_x = FFMAX(max_x, mv_predictor[j][0]);
yading@10:                             max_y = FFMAX(max_y, mv_predictor[j][1]);
yading@10:                             max_r = FFMAX(max_r, ref[j]);
yading@10:                             min_x = FFMIN(min_x, mv_predictor[j][0]);
yading@10:                             min_y = FFMIN(min_y, mv_predictor[j][1]);
yading@10:                             min_r = FFMIN(min_r, ref[j]);
yading@10:                         }
yading@10:                         mv_predictor[pred_count + 1][0] = sum_x - max_x - min_x;
yading@10:                         mv_predictor[pred_count + 1][1] = sum_y - max_y - min_y;
yading@10:                                  ref[pred_count + 1]    = sum_r - max_r - min_r;
yading@10: 
yading@10:                         if (pred_count == 4) {
yading@10:                             mv_predictor[pred_count + 1][0] /= 2;
yading@10:                             mv_predictor[pred_count + 1][1] /= 2;
yading@10:                                      ref[pred_count + 1]    /= 2;
yading@10:                         }
yading@10:                         pred_count += 2;
yading@10:                     }
yading@10: 
yading@10: skip_mean_and_median:
yading@10:                     /* zero MV */
yading@10:                     pred_count++;
yading@10: 
yading@10:                     if (!fixed[mb_xy] && 0) {
yading@10:                         if (s->avctx->codec_id == AV_CODEC_ID_H264) {
yading@10:                             // FIXME
yading@10:                         } else {
yading@10:                             ff_thread_await_progress(&s->last_pic->tf,
yading@10:                                                      mb_y, 0);
yading@10:                         }
yading@10:                         if (!s->last_pic->motion_val[0] ||
yading@10:                             !s->last_pic->ref_index[0])
yading@10:                             goto skip_last_mv;
yading@10:                         prev_x   = s->last_pic->motion_val[0][mot_index][0];
yading@10:                         prev_y   = s->last_pic->motion_val[0][mot_index][1];
yading@10:                         prev_ref = s->last_pic->ref_index[0][4 * mb_xy];
yading@10:                     } else {
yading@10:                         prev_x   = s->cur_pic->motion_val[0][mot_index][0];
yading@10:                         prev_y   = s->cur_pic->motion_val[0][mot_index][1];
yading@10:                         prev_ref = s->cur_pic->ref_index[0][4 * mb_xy];
yading@10:                     }
yading@10: 
yading@10:                     /* last MV */
yading@10:                     mv_predictor[pred_count][0] = prev_x;
yading@10:                     mv_predictor[pred_count][1] = prev_y;
yading@10:                              ref[pred_count]    = prev_ref;
yading@10:                     pred_count++;
yading@10: 
yading@10: skip_last_mv:
yading@10: 
yading@10:                     for (j = 0; j < pred_count; j++) {
yading@10:                         int *linesize = s->cur_pic->f.linesize;
yading@10:                         int score = 0;
yading@10:                         uint8_t *src = s->cur_pic->f.data[0] +
yading@10:                                        mb_x * 16 + mb_y * 16 * linesize[0];
yading@10: 
yading@10:                         s->cur_pic->motion_val[0][mot_index][0] =
yading@10:                             s->mv[0][0][0] = mv_predictor[j][0];
yading@10:                         s->cur_pic->motion_val[0][mot_index][1] =
yading@10:                             s->mv[0][0][1] = mv_predictor[j][1];
yading@10: 
yading@10:                         // predictor intra or otherwise not available
yading@10:                         if (ref[j] < 0)
yading@10:                             continue;
yading@10: 
yading@10:                         s->decode_mb(s->opaque, ref[j], MV_DIR_FORWARD,
yading@10:                                      MV_TYPE_16X16, &s->mv, mb_x, mb_y, 0, 0);
yading@10: 
yading@10:                         if (mb_x > 0 && fixed[mb_xy - 1]) {
yading@10:                             int k;
yading@10:                             for (k = 0; k < 16; k++)
yading@10:                                 score += FFABS(src[k * linesize[0] - 1] -
yading@10:                                                src[k * linesize[0]]);
yading@10:                         }
yading@10:                         if (mb_x + 1 < mb_width && fixed[mb_xy + 1]) {
yading@10:                             int k;
yading@10:                             for (k = 0; k < 16; k++)
yading@10:                                 score += FFABS(src[k * linesize[0] + 15] -
yading@10:                                                src[k * linesize[0] + 16]);
yading@10:                         }
yading@10:                         if (mb_y > 0 && fixed[mb_xy - mb_stride]) {
yading@10:                             int k;
yading@10:                             for (k = 0; k < 16; k++)
yading@10:                                 score += FFABS(src[k - linesize[0]] - src[k]);
yading@10:                         }
yading@10:                         if (mb_y + 1 < mb_height && fixed[mb_xy + mb_stride]) {
yading@10:                             int k;
yading@10:                             for (k = 0; k < 16; k++)
yading@10:                                 score += FFABS(src[k + linesize[0] * 15] -
yading@10:                                                src[k + linesize[0] * 16]);
yading@10:                         }
yading@10: 
yading@10:                         if (score <= best_score) { // <= will favor the last MV
yading@10:                             best_score = score;
yading@10:                             best_pred  = j;
yading@10:                         }
yading@10:                     }
yading@10:                     score_sum += best_score;
yading@10:                     s->mv[0][0][0] = mv_predictor[best_pred][0];
yading@10:                     s->mv[0][0][1] = mv_predictor[best_pred][1];
yading@10: 
yading@10:                     for (i = 0; i < mot_step; i++)
yading@10:                         for (j = 0; j < mot_step; j++) {
yading@10:                             s->cur_pic->motion_val[0][mot_index + i + j * mot_stride][0] = s->mv[0][0][0];
yading@10:                             s->cur_pic->motion_val[0][mot_index + i + j * mot_stride][1] = s->mv[0][0][1];
yading@10:                         }
yading@10: 
yading@10:                     s->decode_mb(s->opaque, ref[best_pred], MV_DIR_FORWARD,
yading@10:                                  MV_TYPE_16X16, &s->mv, mb_x, mb_y, 0, 0);
yading@10: 
yading@10: 
yading@10:                     if (s->mv[0][0][0] != prev_x || s->mv[0][0][1] != prev_y) {
yading@10:                         fixed[mb_xy] = MV_CHANGED;
yading@10:                         changed++;
yading@10:                     } else
yading@10:                         fixed[mb_xy] = MV_UNCHANGED;
yading@10:                 }
yading@10:             }
yading@10:         }
yading@10: 
yading@10:         if (none_left)
yading@10:             return;
yading@10: 
yading@10:         for (i = 0; i < s->mb_num; i++) {
yading@10:             int mb_xy = s->mb_index2xy[i];
yading@10:             if (fixed[mb_xy])
yading@10:                 fixed[mb_xy] = MV_FROZEN;
yading@10:         }
yading@10:     }
yading@10: }
yading@10: 
yading@10: static int is_intra_more_likely(ERContext *s)
yading@10: {
yading@10:     int is_intra_likely, i, j, undamaged_count, skip_amount, mb_x, mb_y;
yading@10: 
yading@10:     if (!s->last_pic || !s->last_pic->f.data[0])
yading@10:         return 1; // no previous frame available -> use spatial prediction
yading@10: 
yading@10:     undamaged_count = 0;
yading@10:     for (i = 0; i < s->mb_num; i++) {
yading@10:         const int mb_xy = s->mb_index2xy[i];
yading@10:         const int error = s->error_status_table[mb_xy];
yading@10:         if (!((error & ER_DC_ERROR) && (error & ER_MV_ERROR)))
yading@10:             undamaged_count++;
yading@10:     }
yading@10: 
yading@10:     if (s->avctx->codec_id == AV_CODEC_ID_H264 && s->ref_count <= 0)
yading@10:         return 1;
yading@10: 
yading@10:     if (undamaged_count < 5)
yading@10:         return 0; // almost all MBs damaged -> use temporal prediction
yading@10: 
yading@10:     // prevent dsp.sad() check, that requires access to the image
yading@10:     if (CONFIG_MPEG_XVMC_DECODER    &&
yading@10:         s->avctx->xvmc_acceleration &&
yading@10:         s->cur_pic->f.pict_type == AV_PICTURE_TYPE_I)
yading@10:         return 1;
yading@10: 
yading@10:     skip_amount     = FFMAX(undamaged_count / 50, 1); // check only up to 50 MBs
yading@10:     is_intra_likely = 0;
yading@10: 
yading@10:     j = 0;
yading@10:     for (mb_y = 0; mb_y < s->mb_height - 1; mb_y++) {
yading@10:         for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
yading@10:             int error;
yading@10:             const int mb_xy = mb_x + mb_y * s->mb_stride;
yading@10: 
yading@10:             error = s->error_status_table[mb_xy];
yading@10:             if ((error & ER_DC_ERROR) && (error & ER_MV_ERROR))
yading@10:                 continue; // skip damaged
yading@10: 
yading@10:             j++;
yading@10:             // skip a few to speed things up
yading@10:             if ((j % skip_amount) != 0)
yading@10:                 continue;
yading@10: 
yading@10:             if (s->cur_pic->f.pict_type == AV_PICTURE_TYPE_I) {
yading@10:                 int *linesize = s->cur_pic->f.linesize;
yading@10:                 uint8_t *mb_ptr      = s->cur_pic->f.data[0] +
yading@10:                                        mb_x * 16 + mb_y * 16 * linesize[0];
yading@10:                 uint8_t *last_mb_ptr = s->last_pic->f.data[0] +
yading@10:                                        mb_x * 16 + mb_y * 16 * linesize[0];
yading@10: 
yading@10:                 if (s->avctx->codec_id == AV_CODEC_ID_H264) {
yading@10:                     // FIXME
yading@10:                 } else {
yading@10:                     ff_thread_await_progress(&s->last_pic->tf, mb_y, 0);
yading@10:                 }
yading@10:                 is_intra_likely += s->dsp->sad[0](NULL, last_mb_ptr, mb_ptr,
yading@10:                                                  linesize[0], 16);
yading@10:                 // FIXME need await_progress() here
yading@10:                 is_intra_likely -= s->dsp->sad[0](NULL, last_mb_ptr,
yading@10:                                                  last_mb_ptr + linesize[0] * 16,
yading@10:                                                  linesize[0], 16);
yading@10:             } else {
yading@10:                 if (IS_INTRA(s->cur_pic->mb_type[mb_xy]))
yading@10:                    is_intra_likely++;
yading@10:                 else
yading@10:                    is_intra_likely--;
yading@10:             }
yading@10:         }
yading@10:     }
yading@10:     // printf("is_intra_likely: %d type:%d\n", is_intra_likely, s->pict_type);
yading@10:     return is_intra_likely > 0;
yading@10: }
yading@10: 
yading@10: void ff_er_frame_start(ERContext *s)
yading@10: {
yading@10:     if (!s->avctx->err_recognition)
yading@10:         return;
yading@10: 
yading@10:     memset(s->error_status_table, ER_MB_ERROR | VP_START | ER_MB_END,
yading@10:            s->mb_stride * s->mb_height * sizeof(uint8_t));
yading@10:     s->error_count    = 3 * s->mb_num;
yading@10:     s->error_occurred = 0;
yading@10: }
yading@10: 
yading@10: /**
yading@10:  * Add a slice.
yading@10:  * @param endx   x component of the last macroblock, can be -1
yading@10:  *               for the last of the previous line
yading@10:  * @param status the status at the end (ER_MV_END, ER_AC_ERROR, ...), it is
yading@10:  *               assumed that no earlier end or error of the same type occurred
yading@10:  */
yading@10: void ff_er_add_slice(ERContext *s, int startx, int starty,
yading@10:                      int endx, int endy, int status)
yading@10: {
yading@10:     const int start_i  = av_clip(startx + starty * s->mb_width, 0, s->mb_num - 1);
yading@10:     const int end_i    = av_clip(endx   + endy   * s->mb_width, 0, s->mb_num);
yading@10:     const int start_xy = s->mb_index2xy[start_i];
yading@10:     const int end_xy   = s->mb_index2xy[end_i];
yading@10:     int mask           = -1;
yading@10: 
yading@10:     if (s->avctx->hwaccel)
yading@10:         return;
yading@10: 
yading@10:     if (start_i > end_i || start_xy > end_xy) {
yading@10:         av_log(s->avctx, AV_LOG_ERROR,
yading@10:                "internal error, slice end before start\n");
yading@10:         return;
yading@10:     }
yading@10: 
yading@10:     if (!s->avctx->err_recognition)
yading@10:         return;
yading@10: 
yading@10:     mask &= ~VP_START;
yading@10:     if (status & (ER_AC_ERROR | ER_AC_END)) {
yading@10:         mask           &= ~(ER_AC_ERROR | ER_AC_END);
yading@10:         s->error_count -= end_i - start_i + 1;
yading@10:     }
yading@10:     if (status & (ER_DC_ERROR | ER_DC_END)) {
yading@10:         mask           &= ~(ER_DC_ERROR | ER_DC_END);
yading@10:         s->error_count -= end_i - start_i + 1;
yading@10:     }
yading@10:     if (status & (ER_MV_ERROR | ER_MV_END)) {
yading@10:         mask           &= ~(ER_MV_ERROR | ER_MV_END);
yading@10:         s->error_count -= end_i - start_i + 1;
yading@10:     }
yading@10: 
yading@10:     if (status & ER_MB_ERROR) {
yading@10:         s->error_occurred = 1;
yading@10:         s->error_count    = INT_MAX;
yading@10:     }
yading@10: 
yading@10:     if (mask == ~0x7F) {
yading@10:         memset(&s->error_status_table[start_xy], 0,
yading@10:                (end_xy - start_xy) * sizeof(uint8_t));
yading@10:     } else {
yading@10:         int i;
yading@10:         for (i = start_xy; i < end_xy; i++)
yading@10:             s->error_status_table[i] &= mask;
yading@10:     }
yading@10: 
yading@10:     if (end_i == s->mb_num)
yading@10:         s->error_count = INT_MAX;
yading@10:     else {
yading@10:         s->error_status_table[end_xy] &= mask;
yading@10:         s->error_status_table[end_xy] |= status;
yading@10:     }
yading@10: 
yading@10:     s->error_status_table[start_xy] |= VP_START;
yading@10: 
yading@10:     if (start_xy > 0 && !(s->avctx->active_thread_type & FF_THREAD_SLICE) &&
yading@10:         s->avctx->skip_top * s->mb_width < start_i) {
yading@10:         int prev_status = s->error_status_table[s->mb_index2xy[start_i - 1]];
yading@10: 
yading@10:         prev_status &= ~ VP_START;
yading@10:         if (prev_status != (ER_MV_END | ER_DC_END | ER_AC_END)) {
yading@10:             s->error_occurred = 1;
yading@10:             s->error_count = INT_MAX;
yading@10:         }
yading@10:     }
yading@10: }
yading@10: 
yading@10: void ff_er_frame_end(ERContext *s)
yading@10: {
yading@10:     int *linesize = s->cur_pic->f.linesize;
yading@10:     int i, mb_x, mb_y, error, error_type, dc_error, mv_error, ac_error;
yading@10:     int distance;
yading@10:     int threshold_part[4] = { 100, 100, 100 };
yading@10:     int threshold = 50;
yading@10:     int is_intra_likely;
yading@10:     int size = s->b8_stride * 2 * s->mb_height;
yading@10: 
yading@10:     /* We do not support ER of field pictures yet,
yading@10:      * though it should not crash if enabled. */
yading@10:     if (!s->avctx->err_recognition || s->error_count == 0              ||
yading@10:         s->avctx->lowres                                               ||
yading@10:         s->avctx->hwaccel                                              ||
yading@10:         s->avctx->codec->capabilities&CODEC_CAP_HWACCEL_VDPAU          ||
yading@10:         !s->cur_pic || s->cur_pic->field_picture                               ||
yading@10:         s->error_count == 3 * s->mb_width *
yading@10:                           (s->avctx->skip_top + s->avctx->skip_bottom)) {
yading@10:         return;
yading@10:     }
yading@10:     if (s->last_pic) {
yading@10:         if (s->last_pic->f.width  != s->cur_pic->f.width  ||
yading@10:             s->last_pic->f.height != s->cur_pic->f.height ||
yading@10:             s->last_pic->f.format != s->cur_pic->f.format) {
yading@10:             av_log(s->avctx, AV_LOG_WARNING, "Cannot use previous picture in error concealment\n");
yading@10:             s->last_pic = NULL;
yading@10:         }
yading@10:     }
yading@10:     if (s->next_pic) {
yading@10:         if (s->next_pic->f.width  != s->cur_pic->f.width  ||
yading@10:             s->next_pic->f.height != s->cur_pic->f.height ||
yading@10:             s->next_pic->f.format != s->cur_pic->f.format) {
yading@10:             av_log(s->avctx, AV_LOG_WARNING, "Cannot use next picture in error concealment\n");
yading@10:             s->next_pic = NULL;
yading@10:         }
yading@10:     }
yading@10: 
yading@10:     if (s->cur_pic->motion_val[0] == NULL) {
yading@10:         av_log(s->avctx, AV_LOG_ERROR, "Warning MVs not available\n");
yading@10: 
yading@10:         for (i = 0; i < 2; i++) {
yading@10:             s->cur_pic->ref_index_buf[i]  = av_buffer_allocz(s->mb_stride * s->mb_height * 4 * sizeof(uint8_t));
yading@10:             s->cur_pic->motion_val_buf[i] = av_buffer_allocz((size + 4) * 2 * sizeof(uint16_t));
yading@10:             if (!s->cur_pic->ref_index_buf[i] || !s->cur_pic->motion_val_buf[i])
yading@10:                 break;
yading@10:             s->cur_pic->ref_index[i]  = s->cur_pic->ref_index_buf[i]->data;
yading@10:             s->cur_pic->motion_val[i] = (int16_t (*)[2])s->cur_pic->motion_val_buf[i]->data + 4;
yading@10:         }
yading@10:         if (i < 2) {
yading@10:             for (i = 0; i < 2; i++) {
yading@10:                 av_buffer_unref(&s->cur_pic->ref_index_buf[i]);
yading@10:                 av_buffer_unref(&s->cur_pic->motion_val_buf[i]);
yading@10:                 s->cur_pic->ref_index[i]  = NULL;
yading@10:                 s->cur_pic->motion_val[i] = NULL;
yading@10:             }
yading@10:             return;
yading@10:         }
yading@10:     }
yading@10: 
yading@10:     if (s->avctx->debug & FF_DEBUG_ER) {
yading@10:         for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
yading@10:             for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
yading@10:                 int status = s->error_status_table[mb_x + mb_y * s->mb_stride];
yading@10: 
yading@10:                 av_log(s->avctx, AV_LOG_DEBUG, "%2X ", status);
yading@10:             }
yading@10:             av_log(s->avctx, AV_LOG_DEBUG, "\n");
yading@10:         }
yading@10:     }
yading@10: 
yading@10: #if 1
yading@10:     /* handle overlapping slices */
yading@10:     for (error_type = 1; error_type <= 3; error_type++) {
yading@10:         int end_ok = 0;
yading@10: 
yading@10:         for (i = s->mb_num - 1; i >= 0; i--) {
yading@10:             const int mb_xy = s->mb_index2xy[i];
yading@10:             int error       = s->error_status_table[mb_xy];
yading@10: 
yading@10:             if (error & (1 << error_type))
yading@10:                 end_ok = 1;
yading@10:             if (error & (8 << error_type))
yading@10:                 end_ok = 1;
yading@10: 
yading@10:             if (!end_ok)
yading@10:                 s->error_status_table[mb_xy] |= 1 << error_type;
yading@10: 
yading@10:             if (error & VP_START)
yading@10:                 end_ok = 0;
yading@10:         }
yading@10:     }
yading@10: #endif
yading@10: #if 1
yading@10:     /* handle slices with partitions of different length */
yading@10:     if (s->partitioned_frame) {
yading@10:         int end_ok = 0;
yading@10: 
yading@10:         for (i = s->mb_num - 1; i >= 0; i--) {
yading@10:             const int mb_xy = s->mb_index2xy[i];
yading@10:             int error       = s->error_status_table[mb_xy];
yading@10: 
yading@10:             if (error & ER_AC_END)
yading@10:                 end_ok = 0;
yading@10:             if ((error & ER_MV_END) ||
yading@10:                 (error & ER_DC_END) ||
yading@10:                 (error & ER_AC_ERROR))
yading@10:                 end_ok = 1;
yading@10: 
yading@10:             if (!end_ok)
yading@10:                 s->error_status_table[mb_xy]|= ER_AC_ERROR;
yading@10: 
yading@10:             if (error & VP_START)
yading@10:                 end_ok = 0;
yading@10:         }
yading@10:     }
yading@10: #endif
yading@10:     /* handle missing slices */
yading@10:     if (s->avctx->err_recognition & AV_EF_EXPLODE) {
yading@10:         int end_ok = 1;
yading@10: 
yading@10:         // FIXME + 100 hack
yading@10:         for (i = s->mb_num - 2; i >= s->mb_width + 100; i--) {
yading@10:             const int mb_xy = s->mb_index2xy[i];
yading@10:             int error1 = s->error_status_table[mb_xy];
yading@10:             int error2 = s->error_status_table[s->mb_index2xy[i + 1]];
yading@10: 
yading@10:             if (error1 & VP_START)
yading@10:                 end_ok = 1;
yading@10: 
yading@10:             if (error2 == (VP_START | ER_MB_ERROR | ER_MB_END) &&
yading@10:                 error1 != (VP_START | ER_MB_ERROR | ER_MB_END) &&
yading@10:                 ((error1 & ER_AC_END) || (error1 & ER_DC_END) ||
yading@10:                 (error1 & ER_MV_END))) {
yading@10:                 // end & uninit
yading@10:                 end_ok = 0;
yading@10:             }
yading@10: 
yading@10:             if (!end_ok)
yading@10:                 s->error_status_table[mb_xy] |= ER_MB_ERROR;
yading@10:         }
yading@10:     }
yading@10: 
yading@10: #if 1
yading@10:     /* backward mark errors */
yading@10:     distance = 9999999;
yading@10:     for (error_type = 1; error_type <= 3; error_type++) {
yading@10:         for (i = s->mb_num - 1; i >= 0; i--) {
yading@10:             const int mb_xy = s->mb_index2xy[i];
yading@10:             int       error = s->error_status_table[mb_xy];
yading@10: 
yading@10:             if (!s->mbskip_table[mb_xy]) // FIXME partition specific
yading@10:                 distance++;
yading@10:             if (error & (1 << error_type))
yading@10:                 distance = 0;
yading@10: 
yading@10:             if (s->partitioned_frame) {
yading@10:                 if (distance < threshold_part[error_type - 1])
yading@10:                     s->error_status_table[mb_xy] |= 1 << error_type;
yading@10:             } else {
yading@10:                 if (distance < threshold)
yading@10:                     s->error_status_table[mb_xy] |= 1 << error_type;
yading@10:             }
yading@10: 
yading@10:             if (error & VP_START)
yading@10:                 distance = 9999999;
yading@10:         }
yading@10:     }
yading@10: #endif
yading@10: 
yading@10:     /* forward mark errors */
yading@10:     error = 0;
yading@10:     for (i = 0; i < s->mb_num; i++) {
yading@10:         const int mb_xy = s->mb_index2xy[i];
yading@10:         int old_error   = s->error_status_table[mb_xy];
yading@10: 
yading@10:         if (old_error & VP_START) {
yading@10:             error = old_error & ER_MB_ERROR;
yading@10:         } else {
yading@10:             error |= old_error & ER_MB_ERROR;
yading@10:             s->error_status_table[mb_xy] |= error;
yading@10:         }
yading@10:     }
yading@10: #if 1
yading@10:     /* handle not partitioned case */
yading@10:     if (!s->partitioned_frame) {
yading@10:         for (i = 0; i < s->mb_num; i++) {
yading@10:             const int mb_xy = s->mb_index2xy[i];
yading@10:             error = s->error_status_table[mb_xy];
yading@10:             if (error & ER_MB_ERROR)
yading@10:                 error |= ER_MB_ERROR;
yading@10:             s->error_status_table[mb_xy] = error;
yading@10:         }
yading@10:     }
yading@10: #endif
yading@10: 
yading@10:     dc_error = ac_error = mv_error = 0;
yading@10:     for (i = 0; i < s->mb_num; i++) {
yading@10:         const int mb_xy = s->mb_index2xy[i];
yading@10:         error = s->error_status_table[mb_xy];
yading@10:         if (error & ER_DC_ERROR)
yading@10:             dc_error++;
yading@10:         if (error & ER_AC_ERROR)
yading@10:             ac_error++;
yading@10:         if (error & ER_MV_ERROR)
yading@10:             mv_error++;
yading@10:     }
yading@10:     av_log(s->avctx, AV_LOG_INFO, "concealing %d DC, %d AC, %d MV errors in %c frame\n",
yading@10:            dc_error, ac_error, mv_error, av_get_picture_type_char(s->cur_pic->f.pict_type));
yading@10: 
yading@10:     is_intra_likely = is_intra_more_likely(s);
yading@10: 
yading@10:     /* set unknown mb-type to most likely */
yading@10:     for (i = 0; i < s->mb_num; i++) {
yading@10:         const int mb_xy = s->mb_index2xy[i];
yading@10:         error = s->error_status_table[mb_xy];
yading@10:         if (!((error & ER_DC_ERROR) && (error & ER_MV_ERROR)))
yading@10:             continue;
yading@10: 
yading@10:         if (is_intra_likely)
yading@10:             s->cur_pic->mb_type[mb_xy] = MB_TYPE_INTRA4x4;
yading@10:         else
yading@10:             s->cur_pic->mb_type[mb_xy] = MB_TYPE_16x16 | MB_TYPE_L0;
yading@10:     }
yading@10: 
yading@10:     // change inter to intra blocks if no reference frames are available
yading@10:     if (!(s->last_pic && s->last_pic->f.data[0]) &&
yading@10:         !(s->next_pic && s->next_pic->f.data[0]))
yading@10:         for (i = 0; i < s->mb_num; i++) {
yading@10:             const int mb_xy = s->mb_index2xy[i];
yading@10:             if (!IS_INTRA(s->cur_pic->mb_type[mb_xy]))
yading@10:                 s->cur_pic->mb_type[mb_xy] = MB_TYPE_INTRA4x4;
yading@10:         }
yading@10: 
yading@10:     /* handle inter blocks with damaged AC */
yading@10:     for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
yading@10:         for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
yading@10:             const int mb_xy   = mb_x + mb_y * s->mb_stride;
yading@10:             const int mb_type = s->cur_pic->mb_type[mb_xy];
yading@10:             const int dir     = !(s->last_pic && s->last_pic->f.data[0]);
yading@10:             const int mv_dir  = dir ? MV_DIR_BACKWARD : MV_DIR_FORWARD;
yading@10:             int mv_type;
yading@10: 
yading@10:             error = s->error_status_table[mb_xy];
yading@10: 
yading@10:             if (IS_INTRA(mb_type))
yading@10:                 continue; // intra
yading@10:             if (error & ER_MV_ERROR)
yading@10:                 continue; // inter with damaged MV
yading@10:             if (!(error & ER_AC_ERROR))
yading@10:                 continue; // undamaged inter
yading@10: 
yading@10:             if (IS_8X8(mb_type)) {
yading@10:                 int mb_index = mb_x * 2 + mb_y * 2 * s->b8_stride;
yading@10:                 int j;
yading@10:                 mv_type = MV_TYPE_8X8;
yading@10:                 for (j = 0; j < 4; j++) {
yading@10:                     s->mv[0][j][0] = s->cur_pic->motion_val[dir][mb_index + (j & 1) + (j >> 1) * s->b8_stride][0];
yading@10:                     s->mv[0][j][1] = s->cur_pic->motion_val[dir][mb_index + (j & 1) + (j >> 1) * s->b8_stride][1];
yading@10:                 }
yading@10:             } else {
yading@10:                 mv_type     = MV_TYPE_16X16;
yading@10:                 s->mv[0][0][0] = s->cur_pic->motion_val[dir][mb_x * 2 + mb_y * 2 * s->b8_stride][0];
yading@10:                 s->mv[0][0][1] = s->cur_pic->motion_val[dir][mb_x * 2 + mb_y * 2 * s->b8_stride][1];
yading@10:             }
yading@10: 
yading@10:             s->decode_mb(s->opaque, 0 /* FIXME h264 partitioned slices need this set */,
yading@10:                          mv_dir, mv_type, &s->mv, mb_x, mb_y, 0, 0);
yading@10:         }
yading@10:     }
yading@10: 
yading@10:     /* guess MVs */
yading@10:     if (s->cur_pic->f.pict_type == AV_PICTURE_TYPE_B) {
yading@10:         for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
yading@10:             for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
yading@10:                 int       xy      = mb_x * 2 + mb_y * 2 * s->b8_stride;
yading@10:                 const int mb_xy   = mb_x + mb_y * s->mb_stride;
yading@10:                 const int mb_type = s->cur_pic->mb_type[mb_xy];
yading@10:                 int mv_dir = MV_DIR_FORWARD | MV_DIR_BACKWARD;
yading@10: 
yading@10:                 error = s->error_status_table[mb_xy];
yading@10: 
yading@10:                 if (IS_INTRA(mb_type))
yading@10:                     continue;
yading@10:                 if (!(error & ER_MV_ERROR))
yading@10:                     continue; // inter with undamaged MV
yading@10:                 if (!(error & ER_AC_ERROR))
yading@10:                     continue; // undamaged inter
yading@10: 
yading@10:                 if (!(s->last_pic && s->last_pic->f.data[0]))
yading@10:                     mv_dir &= ~MV_DIR_FORWARD;
yading@10:                 if (!(s->next_pic && s->next_pic->f.data[0]))
yading@10:                     mv_dir &= ~MV_DIR_BACKWARD;
yading@10: 
yading@10:                 if (s->pp_time) {
yading@10:                     int time_pp = s->pp_time;
yading@10:                     int time_pb = s->pb_time;
yading@10: 
yading@10:                     av_assert0(s->avctx->codec_id != AV_CODEC_ID_H264);
yading@10:                     ff_thread_await_progress(&s->next_pic->tf, mb_y, 0);
yading@10: 
yading@10:                     s->mv[0][0][0] = s->next_pic->motion_val[0][xy][0] *  time_pb            / time_pp;
yading@10:                     s->mv[0][0][1] = s->next_pic->motion_val[0][xy][1] *  time_pb            / time_pp;
yading@10:                     s->mv[1][0][0] = s->next_pic->motion_val[0][xy][0] * (time_pb - time_pp) / time_pp;
yading@10:                     s->mv[1][0][1] = s->next_pic->motion_val[0][xy][1] * (time_pb - time_pp) / time_pp;
yading@10:                 } else {
yading@10:                     s->mv[0][0][0] = 0;
yading@10:                     s->mv[0][0][1] = 0;
yading@10:                     s->mv[1][0][0] = 0;
yading@10:                     s->mv[1][0][1] = 0;
yading@10:                 }
yading@10: 
yading@10:                 s->decode_mb(s->opaque, 0, mv_dir, MV_TYPE_16X16, &s->mv,
yading@10:                              mb_x, mb_y, 0, 0);
yading@10:             }
yading@10:         }
yading@10:     } else
yading@10:         guess_mv(s);
yading@10: 
yading@10:     /* the filters below are not XvMC compatible, skip them */
yading@10:     if (CONFIG_MPEG_XVMC_DECODER && s->avctx->xvmc_acceleration)
yading@10:         goto ec_clean;
yading@10:     /* fill DC for inter blocks */
yading@10:     for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
yading@10:         for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
yading@10:             int dc, dcu, dcv, y, n;
yading@10:             int16_t *dc_ptr;
yading@10:             uint8_t *dest_y, *dest_cb, *dest_cr;
yading@10:             const int mb_xy   = mb_x + mb_y * s->mb_stride;
yading@10:             const int mb_type = s->cur_pic->mb_type[mb_xy];
yading@10: 
yading@10:             error = s->error_status_table[mb_xy];
yading@10: 
yading@10:             if (IS_INTRA(mb_type) && s->partitioned_frame)
yading@10:                 continue;
yading@10:             // if (error & ER_MV_ERROR)
yading@10:             //     continue; // inter data damaged FIXME is this good?
yading@10: 
yading@10:             dest_y  = s->cur_pic->f.data[0] + mb_x * 16 + mb_y * 16 * linesize[0];
yading@10:             dest_cb = s->cur_pic->f.data[1] + mb_x *  8 + mb_y *  8 * linesize[1];
yading@10:             dest_cr = s->cur_pic->f.data[2] + mb_x *  8 + mb_y *  8 * linesize[2];
yading@10: 
yading@10:             dc_ptr = &s->dc_val[0][mb_x * 2 + mb_y * 2 * s->b8_stride];
yading@10:             for (n = 0; n < 4; n++) {
yading@10:                 dc = 0;
yading@10:                 for (y = 0; y < 8; y++) {
yading@10:                     int x;
yading@10:                     for (x = 0; x < 8; x++)
yading@10:                        dc += dest_y[x + (n & 1) * 8 +
yading@10:                              (y + (n >> 1) * 8) * linesize[0]];
yading@10:                 }
yading@10:                 dc_ptr[(n & 1) + (n >> 1) * s->b8_stride] = (dc + 4) >> 3;
yading@10:             }
yading@10: 
yading@10:             dcu = dcv = 0;
yading@10:             for (y = 0; y < 8; y++) {
yading@10:                 int x;
yading@10:                 for (x = 0; x < 8; x++) {
yading@10:                     dcu += dest_cb[x + y * linesize[1]];
yading@10:                     dcv += dest_cr[x + y * linesize[2]];
yading@10:                 }
yading@10:             }
yading@10:             s->dc_val[1][mb_x + mb_y * s->mb_stride] = (dcu + 4) >> 3;
yading@10:             s->dc_val[2][mb_x + mb_y * s->mb_stride] = (dcv + 4) >> 3;
yading@10:         }
yading@10:     }
yading@10: #if 1
yading@10:     /* guess DC for damaged blocks */
yading@10:     guess_dc(s, s->dc_val[0], s->mb_width*2, s->mb_height*2, s->b8_stride, 1);
yading@10:     guess_dc(s, s->dc_val[1], s->mb_width  , s->mb_height  , s->mb_stride, 0);
yading@10:     guess_dc(s, s->dc_val[2], s->mb_width  , s->mb_height  , s->mb_stride, 0);
yading@10: #endif
yading@10: 
yading@10:     /* filter luma DC */
yading@10:     filter181(s->dc_val[0], s->mb_width * 2, s->mb_height * 2, s->b8_stride);
yading@10: 
yading@10: #if 1
yading@10:     /* render DC only intra */
yading@10:     for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
yading@10:         for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
yading@10:             uint8_t *dest_y, *dest_cb, *dest_cr;
yading@10:             const int mb_xy   = mb_x + mb_y * s->mb_stride;
yading@10:             const int mb_type = s->cur_pic->mb_type[mb_xy];
yading@10: 
yading@10:             error = s->error_status_table[mb_xy];
yading@10: 
yading@10:             if (IS_INTER(mb_type))
yading@10:                 continue;
yading@10:             if (!(error & ER_AC_ERROR))
yading@10:                 continue; // undamaged
yading@10: 
yading@10:             dest_y  = s->cur_pic->f.data[0] + mb_x * 16 + mb_y * 16 * linesize[0];
yading@10:             dest_cb = s->cur_pic->f.data[1] + mb_x *  8 + mb_y *  8 * linesize[1];
yading@10:             dest_cr = s->cur_pic->f.data[2] + mb_x *  8 + mb_y *  8 * linesize[2];
yading@10: 
yading@10:             put_dc(s, dest_y, dest_cb, dest_cr, mb_x, mb_y);
yading@10:         }
yading@10:     }
yading@10: #endif
yading@10: 
yading@10:     if (s->avctx->error_concealment & FF_EC_DEBLOCK) {
yading@10:         /* filter horizontal block boundaries */
yading@10:         h_block_filter(s, s->cur_pic->f.data[0], s->mb_width * 2,
yading@10:                        s->mb_height * 2, linesize[0], 1);
yading@10:         h_block_filter(s, s->cur_pic->f.data[1], s->mb_width,
yading@10:                        s->mb_height, linesize[1], 0);
yading@10:         h_block_filter(s, s->cur_pic->f.data[2], s->mb_width,
yading@10:                        s->mb_height, linesize[2], 0);
yading@10: 
yading@10:         /* filter vertical block boundaries */
yading@10:         v_block_filter(s, s->cur_pic->f.data[0], s->mb_width * 2,
yading@10:                        s->mb_height * 2, linesize[0], 1);
yading@10:         v_block_filter(s, s->cur_pic->f.data[1], s->mb_width,
yading@10:                        s->mb_height, linesize[1], 0);
yading@10:         v_block_filter(s, s->cur_pic->f.data[2], s->mb_width,
yading@10:                        s->mb_height, linesize[2], 0);
yading@10:     }
yading@10: 
yading@10: ec_clean:
yading@10:     /* clean a few tables */
yading@10:     for (i = 0; i < s->mb_num; i++) {
yading@10:         const int mb_xy = s->mb_index2xy[i];
yading@10:         int       error = s->error_status_table[mb_xy];
yading@10: 
yading@10:         if (s->cur_pic->f.pict_type != AV_PICTURE_TYPE_B &&
yading@10:             (error & (ER_DC_ERROR | ER_MV_ERROR | ER_AC_ERROR))) {
yading@10:             s->mbskip_table[mb_xy] = 0;
yading@10:         }
yading@10:         s->mbintra_table[mb_xy] = 1;
yading@10:     }
yading@10:     s->cur_pic = NULL;
yading@10:     s->next_pic    = NULL;
yading@10:     s->last_pic    = NULL;
yading@10: }