private void init(int stripeSize, int paritySize) {
assert (stripeSize + paritySize < GF.getFieldSize());
this.stripeSize = stripeSize;
this.paritySize = paritySize;
this.errSignature = new int[paritySize];
this.paritySymbolLocations = new int[paritySize];
this.dataBuff = new int[paritySize + stripeSize];
for (int i = 0; i < paritySize; i++) {
paritySymbolLocations[i] = i;
}
this.primitivePower = new int[stripeSize + paritySize];
// compute powers of the primitive root
for (int i = 0; i < stripeSize + paritySize; i++) {
primitivePower[i] = GF.power(PRIMITIVE_ROOT, i);
}
// compute generating polynomial
int[] gen = {1};
int[] poly = new int[2];
for (int i = 0; i < paritySize; i++) {
poly[0] = primitivePower[i];
poly[1] = 1;
gen = GF.multiply(gen, poly);
}
// generating polynomial has all generating roots
generatingPolynomial = gen;
}
@Override
public int symbolSize() {
return (int) Math.round(Math.log(GF.getFieldSize()) / Math.log(2));
}