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84 lines
4.2 KiB
C++
84 lines
4.2 KiB
C++
/*
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Test for the Bose Chaudhuri Hocquenghem Encoder
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Copyright 2018 Ahmet Inan <inan@aicodix.de>
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*/
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#include <cassert>
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#include <iostream>
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#include "galois_field.hh"
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#include "bose_chaudhuri_hocquenghem_encoder.hh"
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int main()
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{
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if (1) {
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// NASA INTRO BCH(15, 5) T=3
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typedef CODE::BoseChaudhuriHocquenghemEncoder<15, 5> BCH;
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const int L = (BCH::N + 7) / 8;
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BCH encode({0b10011, 0b11111, 0b00111});
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uint8_t code[L] = { 0b11001000 };
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uint8_t target[L] = { 0b11001000, 0b11110100 };
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encode(code);
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for (int i = 0; i < L; ++i)
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assert(code[i] == target[i]);
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}
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if (1) {
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// DVB-S2 FULL BCH(65535, 65343) T=12
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typedef CODE::BoseChaudhuriHocquenghemEncoder<65535, 65343> BCH;
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const int L = (BCH::N + 7) / 8;
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BCH *encode = new BCH({0b10000000000101101, 0b10000000101110011, 0b10000111110111101, 0b10101101001010101, 0b10001111100101111, 0b11111011110110101, 0b11010111101100101, 0b10111001101100111, 0b10000111010100001, 0b10111010110100111, 0b10011101000101101, 0b10001101011100011});
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uint8_t *target = new uint8_t[L];
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for (int i = 0; i < L; ++i)
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target[i] = 0;
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for (int i = 0, s = 0; i < BCH::K; ++i, s=(s*(s*s*51767+71287)+35149)&0xffffff)
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target[i/8] |= ((s^=s>>7)&1) << (7-i%8);
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uint8_t *code = new uint8_t[L];
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for (int i = 0; i < L; ++i)
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code[i] = target[i];
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bool parity[BCH::NP] = { 0, 1, 1, 1, 0, 0, 0, 0, 1, 1, 1, 0, 1, 1, 0, 1, 0, 0, 1, 0, 0, 1, 1, 1, 1, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 1, 1, 0, 1, 1, 0, 1, 1, 0, 0, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 0, 1, 0, 0, 1, 1, 1, 1, 0, 0, 1, 1, 1, 1, 1, 0, 1, 0, 1, 0, 1, 0, 0, 1, 1, 1, 0, 0, 0, 1, 0, 1, 0, 0, 1, 1, 0, 1, 1, 0, 1, 0, 1, 1, 0, 1, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0, 0, 0, 0, 1, 1, 0, 1, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 1, 1, 1, 0, 1, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 1, 0, 1, 0, 1, 1, 0, 0, 1, 0, 1, 0, 0, 1, 0, 0, 0, 0, 0, 1, 0, 0, 1, 1, 1, 1, 1, 0, 0, 1, 1, 1, 0, 1, 0, 1, 0, 1, 1, 0, 0 };
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for (int i = 0; i < BCH::NP; ++i)
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target[(BCH::K+i)/8] |= parity[i] << (7-(BCH::K+i)%8);
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(*encode)(code);
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for (int i = 0; i < L; ++i)
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assert(code[i] == target[i]);
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delete[] target;
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delete[] code;
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delete encode;
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}
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if (0) {
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// NASA INTRO BCH(15, 5) T=3
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typedef CODE::GaloisField<4, 0b10011, uint8_t> GF;
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typedef CODE::BoseChaudhuriHocquenghemEncoderReference<6, 1, 5, GF> BCH;
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GF instance;
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BCH encode({0b10011, 0b11111, 0b00111});
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uint8_t code[BCH::N] = { 1, 1, 0, 0, 1 };
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uint8_t target[BCH::N] = { 1, 1, 0, 0, 1, 0, 0, 0, 1, 1, 1, 1, 0, 1, 0 };
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encode(reinterpret_cast<GF::ValueType *>(code));
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for (int i = 0; i < BCH::N; ++i)
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assert(code[i] == target[i]);
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}
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if (0) {
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// DVB-S2 FULL BCH(65535, 65343) T=12
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typedef CODE::GaloisField<16, 0b10000000000101101, uint16_t> GF;
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typedef CODE::BoseChaudhuriHocquenghemEncoderReference<24, 1, 65343, GF> BCH;
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GF *instance = new GF();
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BCH *encode = new BCH({0b10000000000101101, 0b10000000101110011, 0b10000111110111101, 0b10101101001010101, 0b10001111100101111, 0b11111011110110101, 0b11010111101100101, 0b10111001101100111, 0b10000111010100001, 0b10111010110100111, 0b10011101000101101, 0b10001101011100011});
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uint16_t *code = new uint16_t[BCH::N];
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uint16_t *target = new uint16_t[BCH::N];
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for (int i = 0, s = 0; i < BCH::K; ++i, s=(s*(s*s*51767+71287)+35149)&0xffffff)
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target[i] = code[i] = (s^=s>>7)&1;
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uint16_t parity[BCH::NP] = { 0, 1, 1, 1, 0, 0, 0, 0, 1, 1, 1, 0, 1, 1, 0, 1, 0, 0, 1, 0, 0, 1, 1, 1, 1, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 1, 1, 0, 1, 1, 0, 1, 1, 0, 0, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 0, 1, 0, 0, 1, 1, 1, 1, 0, 0, 1, 1, 1, 1, 1, 0, 1, 0, 1, 0, 1, 0, 0, 1, 1, 1, 0, 0, 0, 1, 0, 1, 0, 0, 1, 1, 0, 1, 1, 0, 1, 0, 1, 1, 0, 1, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0, 0, 0, 0, 1, 1, 0, 1, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 1, 1, 1, 0, 1, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 1, 0, 1, 0, 1, 1, 0, 0, 1, 0, 1, 0, 0, 1, 0, 0, 0, 0, 0, 1, 0, 0, 1, 1, 1, 1, 1, 0, 0, 1, 1, 1, 0, 1, 0, 1, 0, 1, 1, 0, 0 };
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for (int i = 0; i < BCH::NP; ++i)
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target[BCH::K+i] = parity[i];
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(*encode)(reinterpret_cast<GF::ValueType *>(code));
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for (int i = 0; i < BCH::N; ++i)
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assert(code[i] == target[i]);
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delete[] target;
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delete[] code;
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delete encode;
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delete instance;
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}
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std::cerr << "Bose Chaudhuri Hocquenghem Encoder test passed!" << std::endl;
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return 0;
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}
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