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handle data and parity seperate in both BCH and RS

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This commit is contained in:
Ahmet Inan 2018-09-27 12:29:15 +02:00
commit f545b5d6ab
8 changed files with 145 additions and 105 deletions
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18
reed_solomon_encoder.hh
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@ -48,28 +48,28 @@ public:
for (int i = 0; i <= NR; ++i)
generator[i] = index(tmp[i]);
}
void operator()(ValueType *code)
void operator()(ValueType *data, ValueType *parity)
{
// $code = data * x^{NR} + (data * x^{NR}) \mod{generator}$
for (int i = 0; i < NR; ++i)
code[K+i] = ValueType(0);
parity[i] = ValueType(0);
for (int i = 0; i < K; ++i) {
ValueType feedback = code[i] + code[K];
ValueType feedback = data[i] + parity[0];
if (feedback) {
IndexType fb = index(feedback);
for (int j = 1; j < NR; ++j)
code[K+j-1] = fma(fb, generator[NR-j], code[K+j]);
code[N-1] = value(generator[0] * fb);
parity[j-1] = fma(fb, generator[NR-j], parity[j]);
parity[NP-1] = value(generator[0] * fb);
} else {
for (int j = 1; j < NR; ++j)
code[K+j-1] = code[K+j];
code[N-1] = ValueType(0);
parity[j-1] = parity[j];
parity[NP-1] = ValueType(0);
}
}
}
void operator()(value_type *code)
void operator()(value_type *data, value_type *parity)
{
(*this)(reinterpret_cast<ValueType *>(code));
(*this)(reinterpret_cast<ValueType *>(data), reinterpret_cast<ValueType *>(parity));
}
};