static inline void dv_calc_mb_coordinates(const DVprofile *d, int chan, int seq, int slot,
                                          uint16_t *tbl)
{
    static const uint8_t off[] = { 2, 6, 8, 0, 4 };
    static const uint8_t shuf1[] = { 36, 18, 54, 0, 72 };
    static const uint8_t shuf2[] = { 24, 12, 36, 0, 48 };
    static const uint8_t shuf3[] = { 18, 9, 27, 0, 36 };

    static const uint8_t l_start[] = {0, 4, 9, 13, 18, 22, 27, 31, 36, 40};
    static const uint8_t l_start_shuffled[] = { 9, 4, 13, 0, 18 };

    static const uint8_t serpent1[] = {0, 1, 2, 2, 1, 0,
                                       0, 1, 2, 2, 1, 0,
                                       0, 1, 2, 2, 1, 0,
                                       0, 1, 2, 2, 1, 0,
                                       0, 1, 2};
    static const uint8_t serpent2[] = {0, 1, 2, 3, 4, 5, 5, 4, 3, 2, 1, 0,
                                       0, 1, 2, 3, 4, 5, 5, 4, 3, 2, 1, 0,
                                       0, 1, 2, 3, 4, 5};

    static const uint8_t remap[][2] = {{ 0, 0}, { 0, 0}, { 0, 0}, { 0, 0}, /* dummy */
                                       { 0, 0}, { 0, 1}, { 0, 2}, { 0, 3}, {10, 0},
                                       {10, 1}, {10, 2}, {10, 3}, {20, 0}, {20, 1},
                                       {20, 2}, {20, 3}, {30, 0}, {30, 1}, {30, 2},
                                       {30, 3}, {40, 0}, {40, 1}, {40, 2}, {40, 3},
                                       {50, 0}, {50, 1}, {50, 2}, {50, 3}, {60, 0},
                                       {60, 1}, {60, 2}, {60, 3}, {70, 0}, {70, 1},
                                       {70, 2}, {70, 3}, { 0,64}, { 0,65}, { 0,66},
                                       {10,64}, {10,65}, {10,66}, {20,64}, {20,65},
                                       {20,66}, {30,64}, {30,65}, {30,66}, {40,64},
                                       {40,65}, {40,66}, {50,64}, {50,65}, {50,66},
                                       {60,64}, {60,65}, {60,66}, {70,64}, {70,65},
                                       {70,66}, { 0,67}, {20,67}, {40,67}, {60,67}};

    int i, k, m;
    int x, y, blk;

    for (m=0; m<5; m++) {
         switch (d->width) {
         case 1440:
              blk = (chan*11+seq)*27+slot;

              if (chan == 0 && seq == 11) {
                  x = m*27+slot;
                  if (x<90) {
                      y = 0;
                  } else {
                      x = (x - 90)*2;
                      y = 67;
                  }
              } else {
                  i = (4*chan + blk + off[m])%11;
                  k = (blk/11)%27;

                  x = shuf1[m] + (chan&1)*9 + k%9;
                  y = (i*3+k/9)*2 + (chan>>1) + 1;
              }
              tbl[m] = (x<<1)|(y<<9);
              break;
         case 1280:
              blk = (chan*10+seq)*27+slot;

              i = (4*chan + (seq/5) + 2*blk + off[m])%10;
              k = (blk/5)%27;

              x = shuf1[m]+(chan&1)*9 + k%9;
              y = (i*3+k/9)*2 + (chan>>1) + 4;

              if (x >= 80) {
                  x = remap[y][0]+((x-80)<<(y>59));
                  y = remap[y][1];
              }
              tbl[m] = (x<<1)|(y<<9);
              break;
       case 960:
              blk = (chan*10+seq)*27+slot;

              i = (4*chan + (seq/5) + 2*blk + off[m])%10;
              k = (blk/5)%27 + (i&1)*3;

              x = shuf2[m] + k%6 + 6*(chan&1);
              y = l_start[i] + k/6 + 45*(chan>>1);
              tbl[m] = (x<<1)|(y<<9);
              break;
        case 720:
              switch (d->pix_fmt) {
              case AV_PIX_FMT_YUV422P:
                   x = shuf3[m] + slot/3;
                   y = serpent1[slot] +
                       ((((seq + off[m]) % d->difseg_size)<<1) + chan)*3;
                   tbl[m] = (x<<1)|(y<<8);
                   break;
              case AV_PIX_FMT_YUV420P:
                   x = shuf3[m] + slot/3;
                   y = serpent1[slot] +
                       ((seq + off[m]) % d->difseg_size)*3;
                   tbl[m] = (x<<1)|(y<<9);
                   break;
              case AV_PIX_FMT_YUV411P:
                   i = (seq + off[m]) % d->difseg_size;
                   k = slot + ((m==1||m==2)?3:0);

                   x = l_start_shuffled[m] + k/6;
                   y = serpent2[k] + i*6;
                   if (x>21)
                       y = y*2 - i*6;
                   tbl[m] = (x<<2)|(y<<8);
                   break;
              }
        default:
              break;
        }
    }
}