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SSB_HighSpeed_Modem/hsmodem/fec/schifra_reed_solomon_general_codec.hpp
kurt 46faf838bc update
2021-01-15 22:15:58 +01:00

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/*
(**************************************************************************)
(* *)
(* Schifra *)
(* Reed-Solomon Error Correcting Code Library *)
(* *)
(* Release Version 0.0.1 *)
(* http://www.schifra.com *)
(* Copyright (c) 2000-2020 Arash Partow, All Rights Reserved. *)
(* *)
(* The Schifra Reed-Solomon error correcting code library and all its *)
(* components are supplied under the terms of the General Schifra License *)
(* agreement. The contents of the Schifra Reed-Solomon error correcting *)
(* code library and all its components may not be copied or disclosed *)
(* except in accordance with the terms of that agreement. *)
(* *)
(* URL: http://www.schifra.com/license.html *)
(* *)
(**************************************************************************)
*/
#ifndef INCLUDE_SCHIFRA_REED_GENERAL_CODEC_HPP
#define INCLUDE_SCHIFRA_REED_GENERAL_CODEC_HPP
#include "schifra_galois_field.hpp"
#include "schifra_galois_field_polynomial.hpp"
#include "schifra_sequential_root_generator_polynomial_creator.hpp"
#include "schifra_reed_solomon_block.hpp"
#include "schifra_reed_solomon_encoder.hpp"
#include "schifra_reed_solomon_decoder.hpp"
#include "schifra_ecc_traits.hpp"
namespace schifra
{
namespace reed_solomon
{
template <std::size_t code_length, std::size_t fec_length>
void* create_encoder(const galois::field& field,
const std::size_t& gen_poly_index)
{
const std::size_t data_length = code_length - fec_length;
traits::validate_reed_solomon_code_parameters<code_length,fec_length,data_length>();
galois::field_polynomial gen_polynomial(field);
if (
!make_sequential_root_generator_polynomial(field,
gen_poly_index,
fec_length,
gen_polynomial)
)
{
return reinterpret_cast<void*>(0);
}
return new encoder<code_length,fec_length>(field,gen_polynomial);
}
template <std::size_t code_length, std::size_t fec_length>
void* create_decoder(const galois::field& field,
const std::size_t& gen_poly_index)
{
const std::size_t data_length = code_length - fec_length;
traits::validate_reed_solomon_code_parameters<code_length,fec_length,data_length>();
return new decoder<code_length,fec_length>(field,static_cast<unsigned int>(gen_poly_index));
}
template <std::size_t code_length, std::size_t max_fec_length = 128>
class general_codec
{
public:
general_codec(const galois::field& field,
const std::size_t& gen_poly_index)
{
for (std::size_t i = 0; i < max_fec_length; ++i)
{
encoder_[i] = 0;
decoder_[i] = 0;
}
encoder_[ 2] = create_encoder<code_length, 2>(field, gen_poly_index);
encoder_[ 4] = create_encoder<code_length, 4>(field, gen_poly_index);
encoder_[ 6] = create_encoder<code_length, 6>(field, gen_poly_index);
encoder_[ 8] = create_encoder<code_length, 8>(field, gen_poly_index);
encoder_[ 10] = create_encoder<code_length, 10>(field, gen_poly_index);
encoder_[ 12] = create_encoder<code_length, 12>(field, gen_poly_index);
encoder_[ 14] = create_encoder<code_length, 14>(field, gen_poly_index);
encoder_[ 16] = create_encoder<code_length, 16>(field, gen_poly_index);
encoder_[ 18] = create_encoder<code_length, 18>(field, gen_poly_index);
encoder_[ 20] = create_encoder<code_length, 20>(field, gen_poly_index);
encoder_[ 22] = create_encoder<code_length, 22>(field, gen_poly_index);
encoder_[ 24] = create_encoder<code_length, 24>(field, gen_poly_index);
encoder_[ 26] = create_encoder<code_length, 26>(field, gen_poly_index);
encoder_[ 28] = create_encoder<code_length, 28>(field, gen_poly_index);
encoder_[ 30] = create_encoder<code_length, 30>(field, gen_poly_index);
encoder_[ 32] = create_encoder<code_length, 32>(field, gen_poly_index);
encoder_[ 64] = create_encoder<code_length, 64>(field, gen_poly_index);
encoder_[ 80] = create_encoder<code_length, 80>(field, gen_poly_index);
encoder_[ 96] = create_encoder<code_length, 96>(field, gen_poly_index);
encoder_[128] = create_encoder<code_length,128>(field, gen_poly_index);
decoder_[ 2] = create_decoder<code_length, 2>(field, gen_poly_index);
decoder_[ 4] = create_decoder<code_length, 4>(field, gen_poly_index);
decoder_[ 6] = create_decoder<code_length, 6>(field, gen_poly_index);
decoder_[ 8] = create_decoder<code_length, 8>(field, gen_poly_index);
decoder_[ 10] = create_decoder<code_length, 10>(field, gen_poly_index);
decoder_[ 12] = create_decoder<code_length, 12>(field, gen_poly_index);
decoder_[ 14] = create_decoder<code_length, 14>(field, gen_poly_index);
decoder_[ 16] = create_decoder<code_length, 16>(field, gen_poly_index);
decoder_[ 18] = create_decoder<code_length, 18>(field, gen_poly_index);
decoder_[ 20] = create_decoder<code_length, 20>(field, gen_poly_index);
decoder_[ 22] = create_decoder<code_length, 22>(field, gen_poly_index);
decoder_[ 24] = create_decoder<code_length, 24>(field, gen_poly_index);
decoder_[ 26] = create_decoder<code_length, 26>(field, gen_poly_index);
decoder_[ 28] = create_decoder<code_length, 28>(field, gen_poly_index);
decoder_[ 30] = create_decoder<code_length, 30>(field, gen_poly_index);
decoder_[ 32] = create_decoder<code_length, 32>(field, gen_poly_index);
decoder_[ 64] = create_decoder<code_length, 64>(field, gen_poly_index);
decoder_[ 80] = create_decoder<code_length, 80>(field, gen_poly_index);
decoder_[ 96] = create_decoder<code_length, 96>(field, gen_poly_index);
decoder_[128] = create_decoder<code_length,128>(field, gen_poly_index);
}
~general_codec()
{
delete static_cast<reed_solomon::encoder<code_length, 2>*>(encoder_[ 2]);
delete static_cast<reed_solomon::encoder<code_length, 4>*>(encoder_[ 4]);
delete static_cast<reed_solomon::encoder<code_length, 6>*>(encoder_[ 6]);
delete static_cast<reed_solomon::encoder<code_length, 8>*>(encoder_[ 8]);
delete static_cast<reed_solomon::encoder<code_length, 10>*>(encoder_[ 10]);
delete static_cast<reed_solomon::encoder<code_length, 12>*>(encoder_[ 12]);
delete static_cast<reed_solomon::encoder<code_length, 14>*>(encoder_[ 14]);
delete static_cast<reed_solomon::encoder<code_length, 16>*>(encoder_[ 16]);
delete static_cast<reed_solomon::encoder<code_length, 18>*>(encoder_[ 18]);
delete static_cast<reed_solomon::encoder<code_length, 20>*>(encoder_[ 20]);
delete static_cast<reed_solomon::encoder<code_length, 22>*>(encoder_[ 22]);
delete static_cast<reed_solomon::encoder<code_length, 24>*>(encoder_[ 24]);
delete static_cast<reed_solomon::encoder<code_length, 26>*>(encoder_[ 26]);
delete static_cast<reed_solomon::encoder<code_length, 28>*>(encoder_[ 28]);
delete static_cast<reed_solomon::encoder<code_length, 30>*>(encoder_[ 30]);
delete static_cast<reed_solomon::encoder<code_length, 32>*>(encoder_[ 32]);
delete static_cast<reed_solomon::encoder<code_length, 64>*>(encoder_[ 64]);
delete static_cast<reed_solomon::encoder<code_length, 80>*>(encoder_[ 80]);
delete static_cast<reed_solomon::encoder<code_length, 96>*>(encoder_[ 96]);
delete static_cast<reed_solomon::encoder<code_length,128>*>(encoder_[128]);
delete static_cast<reed_solomon::decoder<code_length, 2>*>(decoder_[ 2]);
delete static_cast<reed_solomon::decoder<code_length, 4>*>(decoder_[ 4]);
delete static_cast<reed_solomon::decoder<code_length, 6>*>(decoder_[ 6]);
delete static_cast<reed_solomon::decoder<code_length, 8>*>(decoder_[ 8]);
delete static_cast<reed_solomon::decoder<code_length, 10>*>(decoder_[ 10]);
delete static_cast<reed_solomon::decoder<code_length, 12>*>(decoder_[ 12]);
delete static_cast<reed_solomon::decoder<code_length, 14>*>(decoder_[ 14]);
delete static_cast<reed_solomon::decoder<code_length, 16>*>(decoder_[ 16]);
delete static_cast<reed_solomon::decoder<code_length, 18>*>(decoder_[ 18]);
delete static_cast<reed_solomon::decoder<code_length, 20>*>(decoder_[ 20]);
delete static_cast<reed_solomon::decoder<code_length, 22>*>(decoder_[ 22]);
delete static_cast<reed_solomon::decoder<code_length, 24>*>(decoder_[ 24]);
delete static_cast<reed_solomon::decoder<code_length, 26>*>(decoder_[ 26]);
delete static_cast<reed_solomon::decoder<code_length, 28>*>(decoder_[ 28]);
delete static_cast<reed_solomon::decoder<code_length, 30>*>(decoder_[ 30]);
delete static_cast<reed_solomon::decoder<code_length, 32>*>(decoder_[ 32]);
delete static_cast<reed_solomon::decoder<code_length, 64>*>(decoder_[ 64]);
delete static_cast<reed_solomon::decoder<code_length, 80>*>(decoder_[ 80]);
delete static_cast<reed_solomon::decoder<code_length, 96>*>(decoder_[ 96]);
delete static_cast<reed_solomon::decoder<code_length,128>*>(decoder_[128]);
}
template <typename Block>
bool encode(Block& block) const
{
/*
cl : code length
fl : fec length
*/
typedef reed_solomon::encoder<Block::trait::code_length,Block::trait::fec_length> encoder_type;
traits::__static_assert__<(Block::trait::fec_length <= max_fec_length)>();
if (encoder_[Block::trait::fec_length] == 0)
return false;
else
return static_cast<encoder_type*>(encoder_[Block::trait::fec_length])->encode(block);
}
template <typename Block>
bool decode(Block& block) const
{
typedef reed_solomon::decoder<Block::trait::code_length,Block::trait::fec_length> decoder_type;
traits::__static_assert__<(Block::trait::fec_length <= max_fec_length)>();
if (decoder_[Block::trait::fec_length] == 0)
return false;
else
return static_cast<decoder_type*>(decoder_[Block::trait::fec_length])->decode(block);
}
private:
void* encoder_[max_fec_length + 1];
void* decoder_[max_fec_length + 1];
};
} // namespace reed_solomon
} // namespace schifra
#endif
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