dc= s->dc_val[0][mb_x*2+1 + (i&1) + (mb_y*2+1 + (i>>1))*(s->mb_width*2+2)];
dc= s->dc_val[0][mb_x*2 + (i&1) + (mb_y*2 + (i>>1))*s->b8_stride];
static void put_dc(MpegEncContext *s, uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr, int mb_x, int mb_y){    int dc, dcu, dcv, y, i;    for(i=0; i<4; i++){        dc= s->dc_val[0][mb_x*2+1 + (i&1) + (mb_y*2+1 + (i>>1))*(s->mb_width*2+2)];        if(dc<0) dc=0;        else if(dc>2040) dc=2040;        for(y=0; y<8; y++){            int x;            for(x=0; x<8; x++){                dest_y[x + (i&1)*8 + (y + (i>>1)*8)*s->linesize]= dc/8;            }        }    }    dcu = s->dc_val[1][mb_x+1 + (mb_y+1)*(s->mb_width+2)];    dcv = s->dc_val[2][mb_x+1 + (mb_y+1)*(s->mb_width+2)];    if     (dcu<0   ) dcu=0;    else if(dcu>2040) dcu=2040;    if     (dcv<0   ) dcv=0;    else if(dcv>2040) dcv=2040;    for(y=0; y<8; y++){        int x;        for(x=0; x<8; x++){            dest_cb[x + y*(s->uvlinesize)]= dcu/8;            dest_cr[x + y*(s->uvlinesize)]= dcv/8;        }    }}