interLeaver::interLeaver (DabParams *p) {
switch (p -> dabMode) {
case 1:
default: // shouldn't happen
permTable = createMapper (p -> T_u,
511, 256, 256 + p -> K,
new int16_t [p -> T_u]);
break;
case 2:
permTable = createMapper (p -> T_u,
127, 64, 64 + p -> K,
new int16_t [p -> T_u]);
break;
case 3:
permTable = createMapper (p -> T_u,
63, 32, 32 + p -> K,
new int16_t [p -> T_u]);
break;
case 4:
permTable = createMapper (p -> T_u,
255, 128, 128 + p -> K,
new int16_t [p -> T_u]);
break;
}
}
permVector::permVector (DabParams *p) {
//int16_t i;
//int16_t index = 0;
//int16_t *tmp = (int16_t *)alloca (p -> T_u * sizeof (int16_t));
//
// permTable = new int16_t [p -> K];
// index = 0;
//// step 1: generate the permutation
// tmp [0] = 0;
// for (i = 1; i < p -> T_u; i ++)
// tmp [i] = (13 * tmp [i - 1] + 511) % (p -> T_u);
//// step 2: make it into a map of p -> K elements
//
// for (i = 0; i < p -> T_u; i ++) {
// if (tmp [i] == p -> T_u / 2)
// continue;
// if ((tmp [i] < 256) ||
// (tmp [i] > 1792))
// continue;
//// we now have a table with values from 256 .. 1792
////
// permTable [index ++] = tmp [i] - p -> T_u / 2;
//// we now have a table with values from -768 .. 768
// }
switch (p -> dabMode) {
case 1:
default: // shouldn't happen
permTable = createMapper (p -> T_u,
511, 256, 256 + p -> K,
new int16_t [p -> T_u]);
break;
case 2:
permTable = createMapper (p -> T_u,
127, 64, 64 + p -> K,
new int16_t [p -> T_u]);
break;
case 3:
permTable = createMapper (p -> T_u,
63, 32, 32 + p -> K,
new int16_t [p -> T_u]);
break;
case 4:
permTable = createMapper (p -> T_u,
255, 128, 128 + p -> K,
new int16_t [p -> T_u]);
break;
}
}
