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Add LDU1 Reed-Solomon encoding and decoding.

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This commit is contained in:
Jonathan Naylor
2016-09-27 18:36:08 +01:00
parent 018b6e4dec
commit 614ee83f08
14 changed files with 436 additions and 810 deletions
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20
P25Data.cpp
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@@ -71,7 +71,7 @@ void CP25Data::encodeHeader(unsigned char* data)
CP25Utils::encode(DUMMY_HEADER, data, 114U, 780U);
}
void CP25Data::processLDU1(unsigned char* data)
bool CP25Data::processLDU1(unsigned char* data)
{
assert(data != NULL);
@@ -96,9 +96,11 @@ void CP25Data::processLDU1(unsigned char* data)
CP25Utils::decode(data, raw, 1356U, 1398U);
decodeLDUHamming(raw, rs + 15U);
// CUtils::dump(1U, "P25, LDU1 Data before", rs, 18U);
m_rs241213.decode(rs);
bool ret = m_rs241213.decode(rs);
if (!ret) {
LogDebug("P25, uncorrectable errors in the RS(24,12,13) code");
return false;
}
m_lcf = rs[0U];
m_mfId = rs[1U];
@@ -119,9 +121,7 @@ void CP25Data::processLDU1(unsigned char* data)
break;
}
// m_rs241213.encode(rs);
// CUtils::dump(1U, "P25, LDU1 Data after", rs, 18U);
m_rs241213.encode(rs);
encodeLDUHamming(raw, rs + 0U);
CP25Utils::encode(raw, data, 410U, 452U);
@@ -140,6 +140,8 @@ void CP25Data::processLDU1(unsigned char* data)
encodeLDUHamming(raw, rs + 15U);
CP25Utils::encode(raw, data, 1356U, 1398U);
return true;
}
void CP25Data::encodeLDU1(unsigned char* data)
@@ -174,9 +176,7 @@ void CP25Data::encodeLDU1(unsigned char* data)
break;
}
// m_rs241213.encode(rs);
// CUtils::dump(1U, "P25, LDU1 Data", rs, 18U);
m_rs241213.encode(rs);
unsigned char raw[5U];
encodeLDUHamming(raw, rs + 0U);