const int mot_stride = s->mb_width + 2; const int mot_xy = (mb_y + 1)*mot_stride + mb_x + 1;
const int mot_stride = s->mb_stride; const int mot_xy = mb_y*mot_stride + mb_x;
static int ff_estimate_motion_b(MpegEncContext * s,                       int mb_x, int mb_y, int16_t (*mv_table)[2], Picture *picture, int f_code){    int mx, my, range, dmin;    int xmin, ymin, xmax, ymax;    int rel_xmin, rel_ymin, rel_xmax, rel_ymax;    int pred_x=0, pred_y=0;    int P[10][2];    const int shift= 1+s->quarter_sample;    const int mot_stride = s->mb_width + 2;    const int mot_xy = (mb_y + 1)*mot_stride + mb_x + 1;    uint8_t * const ref_picture= picture->data[0];    uint8_t * const mv_penalty= s->me.mv_penalty[f_code] + MAX_MV;    int mv_scale;            s->me.penalty_factor    = get_penalty_factor(s, s->avctx->me_cmp);    s->me.sub_penalty_factor= get_penalty_factor(s, s->avctx->me_sub_cmp);    s->me.mb_penalty_factor = get_penalty_factor(s, s->avctx->mb_cmp);    get_limits(s, &range, &xmin, &ymin, &xmax, &ymax);    rel_xmin= xmin - mb_x*16;    rel_xmax= xmax - mb_x*16;    rel_ymin= ymin - mb_y*16;    rel_ymax= ymax - mb_y*16;    switch(s->me_method) {    case ME_ZERO:    default:	no_motion_search(s, &mx, &my);        dmin = 0;        mx-= mb_x*16;        my-= mb_y*16;        break;    case ME_FULL:	dmin = full_motion_search(s, &mx, &my, range, xmin, ymin, xmax, ymax, ref_picture);        mx-= mb_x*16;        my-= mb_y*16;        break;    case ME_LOG:	dmin = log_motion_search(s, &mx, &my, range / 2, xmin, ymin, xmax, ymax, ref_picture);        mx-= mb_x*16;        my-= mb_y*16;        break;    case ME_PHODS:	dmin = phods_motion_search(s, &mx, &my, range / 2, xmin, ymin, xmax, ymax, ref_picture);        mx-= mb_x*16;        my-= mb_y*16;        break;    case ME_X1:    case ME_EPZS:       {            P_LEFT[0]        = mv_table[mot_xy - 1][0];            P_LEFT[1]        = mv_table[mot_xy - 1][1];            if(P_LEFT[0]       > (rel_xmax<<shift)) P_LEFT[0]       = (rel_xmax<<shift);            /* special case for first line */            if (mb_y) {                P_TOP[0] = mv_table[mot_xy - mot_stride             ][0];                P_TOP[1] = mv_table[mot_xy - mot_stride             ][1];                P_TOPRIGHT[0] = mv_table[mot_xy - mot_stride + 1         ][0];                P_TOPRIGHT[1] = mv_table[mot_xy - mot_stride + 1         ][1];                if(P_TOP[1] > (rel_ymax<<shift)) P_TOP[1]= (rel_ymax<<shift);                if(P_TOPRIGHT[0] < (rel_xmin<<shift)) P_TOPRIGHT[0]= (rel_xmin<<shift);                if(P_TOPRIGHT[1] > (rel_ymax<<shift)) P_TOPRIGHT[1]= (rel_ymax<<shift);                        P_MEDIAN[0]= mid_pred(P_LEFT[0], P_TOP[0], P_TOPRIGHT[0]);                P_MEDIAN[1]= mid_pred(P_LEFT[1], P_TOP[1], P_TOPRIGHT[1]);            }            pred_x= P_LEFT[0];            pred_y= P_LEFT[1];        }                if(mv_table == s->b_forw_mv_table){            mv_scale= (s->pb_time<<16) / (s->pp_time<<shift);        }else{            mv_scale= ((s->pb_time - s->pp_time)<<16) / (s->pp_time<<shift);        }                dmin = s->me.motion_search[0](s, 0, &mx, &my, P, pred_x, pred_y, rel_xmin, rel_ymin, rel_xmax, rel_ymax,                                       picture, s->p_mv_table, mv_scale, mv_penalty);         break;    }        dmin= s->me.sub_motion_search(s, &mx, &my, dmin, rel_xmin, rel_ymin, rel_xmax, rel_ymax,				   pred_x, pred_y, picture, 0, 0, mv_penalty);                                       if(s->avctx->me_sub_cmp != s->avctx->mb_cmp && !s->me.skip)        dmin= s->me.get_mb_score(s, mx, my, pred_x, pred_y, picture, mv_penalty);//printf("%d %d %d %d//", s->mb_x, s->mb_y, mx, my);//    s->mb_type[mb_y*s->mb_width + mb_x]= mb_type;    mv_table[mot_xy][0]= mx;    mv_table[mot_xy][1]= my;    return dmin;}