+ { /* consider I-block */
+ block_t fb_i;
+ int y,c;
+ memcpy(&fb_i, &fb, sizeof(block_t));
+ dodctandquant(&fb_i, &b_i, 1, *quant);
+ //quantize(&fb_i, &b_i, 1, *quant);
+ getblockpatterns(&b_i, &y, &c, 1);
+ bits_i = 1; //cod
+ bits_i += mcbpc_inter[3*4+c].len;
+ bits_i += cbpy[y].len;
+ bits_i += coefbits8x8(b_i.y1, 1);
+ bits_i += coefbits8x8(b_i.y2, 1);
+ bits_i += coefbits8x8(b_i.y3, 1);
+ bits_i += coefbits8x8(b_i.y4, 1);
+ bits_i += coefbits8x8(b_i.u, 1);
+ bits_i += coefbits8x8(b_i.v, 1);
+ }
+
+ { /* consider mvd(x,y)-block */
+ block_t fbdiff;
+ int y,c;
+
+ x_v00=0;
+ y_v00=0;
+
+ if(s->do_motion) {
+ int hx,hy;
+ int bestx=0,besty=0,bestbits=65536;
+ int startx=-2,endx=2;
+ int starty=-2,endy=2;
+
+ if(!bx) startx=0;
+ if(!by) starty=0;
+ if(bx==s->bbx-1) endx=0;
+ if(by==s->bby-1) endy=0;
+
+ for(hx=startx;hx<=endx;hx+=1)
+ for(hy=starty;hy<=endy;hy+=1)
+ {
+ block_t b;
+ block_t fbold;
+ int bits = 0;
+ memcpy(&fbdiff, &fb, sizeof(block_t));
+ getmvdregion(&fbold, s->oldpic, bx, by, hx, hy, s->linex);
+ yuvdiff(&fbdiff, &fbold);
+ dodctandquant(&fbdiff, &b, 0, *quant);
+ //quantize(&fbdiff, &b, 0, *quant);
+ bits += coefbits8x8(b.y1, 0);
+ bits += coefbits8x8(b.y2, 0);
+ bits += coefbits8x8(b.y3, 0);
+ bits += coefbits8x8(b.y4, 0);
+ bits += coefbits8x8(b.u, 0);
+ bits += coefbits8x8(b.v, 0);
+ if(bits<bestbits) {
+ bestbits = bits;
+ bestx = hx;
+ besty = hy;
+ }
+ }
+ x_v00 = bestx;
+ y_v00 = besty;
+ }
+
+ memcpy(&fbdiff, &fb, sizeof(block_t));
+ getmvdregion(&fbold_v00, s->oldpic, bx, by, x_v00, y_v00, s->linex);
+ yuvdiff(&fbdiff, &fbold_v00);
+ dodctandquant(&fbdiff, &b_v00, 0, *quant);
+ //quantize(&fbdiff, &b_v00, 0, *quant);
+ getblockpatterns(&b_v00, &y, &c, 0);
+
+ bits_v00 = 1; //cod
+ bits_v00 += mcbpc_inter[0*4+c].len;
+ bits_v00 += cbpy[y^15].len;
+ bits_v00 += mvd[mvd2index(predictmvdx, predictmvdy, x_v00, y_v00, 0)].len; // (0,0)
+ bits_v00 += mvd[mvd2index(predictmvdx, predictmvdy, x_v00, y_v00, 1)].len;
+ bits_v00 += coefbits8x8(b_v00.y1, 0);
+ bits_v00 += coefbits8x8(b_v00.y2, 0);
+ bits_v00 += coefbits8x8(b_v00.y3, 0);
+ bits_v00 += coefbits8x8(b_v00.y4, 0);
+ bits_v00 += coefbits8x8(b_v00.u, 0);
+ bits_v00 += coefbits8x8(b_v00.v, 0);
+ }
+
+ if(bits_i > bits_v00)
+ {