int32_t d[256];
uint8_t w;

w = 0;
for (int i = 0; i < 256; i++) {
  d[i] = 0;
}

if (param_Preset == 1) {
  for (int i = 0; i < BUFSIZE; i++) {
    w--;
    outlet_out[i] =
        (d[w] = inlet_in[i] >> 2) + d[(uint8_t)(w + ((uint8_t)53))] -
        d[(uint8_t)(w + ((uint8_t)62))] - d[(uint8_t)(w + ((uint8_t)71))] -
        d[(uint8_t)(w + ((uint8_t)73))] - d[(uint8_t)(w + ((uint8_t)147))] +
        d[(uint8_t)(w + ((uint8_t)233))] + d[(uint8_t)(w + ((uint8_t)252))];
  }
} else if (param_Preset == 2) {
  for (int i = 0; i < BUFSIZE; i++) {
    w--;
    outlet_out[i] =
        (d[w] = inlet_in[i] >> 2) + d[(uint8_t)(w + ((uint8_t)37))] -
        d[(uint8_t)(w + ((uint8_t)43))] - d[(uint8_t)(w + ((uint8_t)48))] -
        d[(uint8_t)(w + ((uint8_t)61))] - d[(uint8_t)(w + ((uint8_t)124))] +
        d[(uint8_t)(w + ((uint8_t)148))] + d[(uint8_t)(w + ((uint8_t)155))];
  }
} else if (param_Preset == 3) {
  for (int i = 0; i < BUFSIZE; i++) {
    w--;
    outlet_out[i] =
        (d[w] = inlet_in[i] >> 2) - d[(uint8_t)(w + ((uint8_t)3))] +
        d[(uint8_t)(w + ((uint8_t)32))] + d[(uint8_t)(w + ((uint8_t)35))] -
        d[(uint8_t)(w + ((uint8_t)87))] - d[(uint8_t)(w + ((uint8_t)117))] -
        d[(uint8_t)(w + ((uint8_t)249))] + d[(uint8_t)(w + ((uint8_t)255))];
  }

} else if (param_Preset == 4) {
  for (int i = 0; i < BUFSIZE; i++) {
    w--;
    outlet_out[i] =
        (d[w] = (inlet_in[i] >> 2) & 0xFFFFF000) +
        d[(uint8_t)(w + ((uint8_t)23))] - d[(uint8_t)(w + ((uint8_t)28))] -
        d[(uint8_t)(w + ((uint8_t)83))] + d[(uint8_t)(w + ((uint8_t)87))] +
        d[(uint8_t)(w + ((uint8_t)177))] - d[(uint8_t)(w + ((uint8_t)183))] -
        d[(uint8_t)(w + ((uint8_t)227))];
    d[w] +=
        (-d[(uint8_t)(w + ((uint8_t)17))] + d[(uint8_t)(w + ((uint8_t)35))] -
         d[(uint8_t)(w + ((uint8_t)59))] + d[(uint8_t)(w + ((uint8_t)65))] -
         d[(uint8_t)(w + ((uint8_t)73))] + d[(uint8_t)(w + ((uint8_t)83))] +
         d[(uint8_t)(w + ((uint8_t)117))] - d[(uint8_t)(w + ((uint8_t)153))] +
         d[(uint8_t)(w + ((uint8_t)175))] - d[(uint8_t)(w + ((uint8_t)181))] +
         d[(uint8_t)(w + ((uint8_t)243))] - d[(uint8_t)(w + ((uint8_t)255))]) >>
        3;
  }
} else if (param_Preset == 5) {
  for (int i = 0; i < BUFSIZE; i++) {
    w--;
    outlet_out[i] =
        (d[w] = inlet_in[i] >> 1) - d[(uint8_t)(w + ((uint8_t)47))] -
        d[(uint8_t)(w + ((uint8_t)137))] + d[(uint8_t)(w + ((uint8_t)255))];
  }

} else if (param_Preset == 6) {
  for (int i = 0; i < BUFSIZE; i++) {
    w--;
    outlet_out[i] =
        (d[w] = inlet_in[i] >> 2) - d[(uint8_t)(w + (uint8_t)1)] -
        d[(uint8_t)(w + (uint8_t)5)] - d[(uint8_t)(w + (uint8_t)6)] +
        d[(uint8_t)(w + (uint8_t)7)] - d[(uint8_t)(w + (uint8_t)12)] +
        d[(uint8_t)(w + (uint8_t)15)] + d[(uint8_t)(w + (uint8_t)17)] -
        d[(uint8_t)(w + (uint8_t)26)] + d[(uint8_t)(w + (uint8_t)38)] +
        d[(uint8_t)(w + (uint8_t)49)] - d[(uint8_t)(w + (uint8_t)70)] -
        d[(uint8_t)(w + (uint8_t)80)] + d[(uint8_t)(w + (uint8_t)138)] +
        d[(uint8_t)(w + (uint8_t)191)] - d[(uint8_t)(w + (uint8_t)255)];
  }
} else if (param_Preset == 7) {
  for (int i = 0; i < BUFSIZE; i++) {
    w--;
    outlet_out[i] =
        (d[w] = inlet_in[i] >> 2) + d[(uint8_t)(w + (uint8_t)1)] +
        d[(uint8_t)(w + (uint8_t)2)] + d[(uint8_t)(w + (uint8_t)3)] -
        d[(uint8_t)(w + (uint8_t)9)] - d[(uint8_t)(w + (uint8_t)11)] -
        d[(uint8_t)(w + (uint8_t)13)] - d[(uint8_t)(w + (uint8_t)16)] +
        d[(uint8_t)(w + (uint8_t)23)] + d[(uint8_t)(w + (uint8_t)26)] -
        d[(uint8_t)(w + (uint8_t)56)] - d[(uint8_t)(w + (uint8_t)104)] -
        d[(uint8_t)(w + (uint8_t)130)] - d[(uint8_t)(w + (uint8_t)158)] +
        d[(uint8_t)(w + (uint8_t)212)] + d[(uint8_t)(w + (uint8_t)230)];
  }
} else if (param_Preset == 8) {
  for (int i = 0; i < BUFSIZE; i++) {
    w--;
    outlet_out[i] =
        (d[w] = inlet_in[i] >> 2) - d[(uint8_t)(w + (uint8_t)1)] +
        d[(uint8_t)(w + (uint8_t)2)] - d[(uint8_t)(w + (uint8_t)4)] +
        d[(uint8_t)(w + (uint8_t)5)] + d[(uint8_t)(w + (uint8_t)35)] -
        d[(uint8_t)(w + (uint8_t)36)] - d[(uint8_t)(w + (uint8_t)41)] +
        d[(uint8_t)(w + (uint8_t)70)] - d[(uint8_t)(w + (uint8_t)74)] -
        d[(uint8_t)(w + (uint8_t)134)] + d[(uint8_t)(w + (uint8_t)143)] -
        d[(uint8_t)(w + (uint8_t)174)] + d[(uint8_t)(w + (uint8_t)175)] -
        d[(uint8_t)(w + (uint8_t)217)] + d[(uint8_t)(w + (uint8_t)251)];
  }
} else if (param_Preset == 9) {
  for (int i = 0; i < BUFSIZE; i++) {
    w--;
    outlet_out[i] =
        (d[w] = inlet_in[i] >> 2) + d[(uint8_t)(w + (uint8_t)3)] +
        d[(uint8_t)(w + (uint8_t)11)] + d[(uint8_t)(w + (uint8_t)13)] +
        d[(uint8_t)(w + (uint8_t)16)] - d[(uint8_t)(w + (uint8_t)30)] -
        d[(uint8_t)(w + (uint8_t)31)] - d[(uint8_t)(w + (uint8_t)33)] -
        d[(uint8_t)(w + (uint8_t)35)] - d[(uint8_t)(w + (uint8_t)37)] +
        d[(uint8_t)(w + (uint8_t)55)] - d[(uint8_t)(w + (uint8_t)98)] -
        d[(uint8_t)(w + (uint8_t)104)] - d[(uint8_t)(w + (uint8_t)111)] +
        d[(uint8_t)(w + (uint8_t)135)] + d[(uint8_t)(w + (uint8_t)246)];
  }
}

else if (param_Preset == 10) {
  for (int i = 0; i < BUFSIZE; i++) {
    w--;
    outlet_out[i] =
        (d[w] = inlet_in[i] >> 2) + d[(uint8_t)(w + (uint8_t)1)] -
        d[(uint8_t)(w + (uint8_t)2)] - d[(uint8_t)(w + (uint8_t)4)] -
        d[(uint8_t)(w + (uint8_t)6)] + d[(uint8_t)(w + (uint8_t)12)] +
        d[(uint8_t)(w + (uint8_t)21)] - d[(uint8_t)(w + (uint8_t)25)] -
        d[(uint8_t)(w + (uint8_t)26)] - d[(uint8_t)(w + (uint8_t)28)] +
        d[(uint8_t)(w + (uint8_t)29)] + d[(uint8_t)(w + (uint8_t)30)] +
        d[(uint8_t)(w + (uint8_t)89)] - d[(uint8_t)(w + (uint8_t)90)] +
        d[(uint8_t)(w + (uint8_t)97)] - d[(uint8_t)(w + (uint8_t)98)];
  }
} else if (param_Preset == 11) {
  for (int i = 0; i < BUFSIZE; i++) {
    w--;
    outlet_out[i] =
        (d[w] = inlet_in[i] >> 2) - d[(uint8_t)(w + (uint8_t)1)] +
        d[(uint8_t)(w + (uint8_t)2)] - d[(uint8_t)(w + (uint8_t)3)] -
        d[(uint8_t)(w + (uint8_t)4)] - d[(uint8_t)(w + (uint8_t)7)] -
        d[(uint8_t)(w + (uint8_t)11)] + d[(uint8_t)(w + (uint8_t)17)] +
        d[(uint8_t)(w + (uint8_t)20)] + d[(uint8_t)(w + (uint8_t)25)] +
        d[(uint8_t)(w + (uint8_t)27)] - d[(uint8_t)(w + (uint8_t)31)] +
        d[(uint8_t)(w + (uint8_t)36)] - d[(uint8_t)(w + (uint8_t)49)] +
        d[(uint8_t)(w + (uint8_t)63)] - d[(uint8_t)(w + (uint8_t)84)];
  }
} else if (param_Preset == 12) {
  for (int i = 0; i < BUFSIZE; i++) {
    w--;
    outlet_out[i] =
        (d[w] = inlet_in[i] >> 2) + d[(uint8_t)(w + (uint8_t)2)] +
        d[(uint8_t)(w + (uint8_t)3)] - d[(uint8_t)(w + (uint8_t)4)] -
        d[(uint8_t)(w + (uint8_t)13)] + d[(uint8_t)(w + (uint8_t)19)] -
        d[(uint8_t)(w + (uint8_t)20)] - d[(uint8_t)(w + (uint8_t)28)] -
        d[(uint8_t)(w + (uint8_t)29)] - d[(uint8_t)(w + (uint8_t)31)] +
        d[(uint8_t)(w + (uint8_t)51)] - d[(uint8_t)(w + (uint8_t)65)] +
        d[(uint8_t)(w + (uint8_t)66)] + d[(uint8_t)(w + (uint8_t)84)] +
        d[(uint8_t)(w + (uint8_t)87)] - d[(uint8_t)(w + (uint8_t)122)];
  }
} else {
  for (int i = 0; i < BUFSIZE; i++) {
    w--;
    d[w] = inlet_in[i] >> 2;
    outlet_out[i] = inlet_in[i];
  }
}