mirror of
https://github.com/dj0abr/SSB_HighSpeed_Modem.git
synced 2024-08-21 21:56:35 -04:00
139 lines
4.9 KiB
C++
139 lines
4.9 KiB
C++
|
/*
|
||
|
(**************************************************************************)
|
||
|
(* *)
|
||
|
(* 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_SOLOMON_FILE_ENCODER_HPP
|
||
|
#define INCLUDE_SCHIFRA_REED_SOLOMON_FILE_ENCODER_HPP
|
||
|
|
||
|
|
||
|
#include <cstring>
|
||
|
#include <iostream>
|
||
|
#include <fstream>
|
||
|
|
||
|
#include "schifra_reed_solomon_block.hpp"
|
||
|
#include "schifra_reed_solomon_encoder.hpp"
|
||
|
#include "schifra_fileio.hpp"
|
||
|
|
||
|
|
||
|
namespace schifra
|
||
|
{
|
||
|
|
||
|
namespace reed_solomon
|
||
|
{
|
||
|
|
||
|
template <std::size_t code_length, std::size_t fec_length, std::size_t data_length = code_length - fec_length>
|
||
|
class file_encoder
|
||
|
{
|
||
|
public:
|
||
|
|
||
|
typedef encoder<code_length,fec_length> encoder_type;
|
||
|
typedef typename encoder_type::block_type block_type;
|
||
|
|
||
|
file_encoder(const encoder_type& encoder,
|
||
|
const std::string& input_file_name,
|
||
|
const std::string& output_file_name)
|
||
|
{
|
||
|
std::size_t remaining_bytes = schifra::fileio::file_size(input_file_name);
|
||
|
if (remaining_bytes == 0)
|
||
|
{
|
||
|
std::cout << "reed_solomon::file_encoder() - Error: input file has ZERO size." << std::endl;
|
||
|
return;
|
||
|
}
|
||
|
|
||
|
std::ifstream in_stream(input_file_name.c_str(),std::ios::binary);
|
||
|
if (!in_stream)
|
||
|
{
|
||
|
std::cout << "reed_solomon::file_encoder() - Error: input file could not be opened." << std::endl;
|
||
|
return;
|
||
|
}
|
||
|
|
||
|
std::ofstream out_stream(output_file_name.c_str(),std::ios::binary);
|
||
|
if (!out_stream)
|
||
|
{
|
||
|
std::cout << "reed_solomon::file_encoder() - Error: output file could not be created." << std::endl;
|
||
|
return;
|
||
|
}
|
||
|
|
||
|
std::memset(data_buffer_,0,sizeof(data_buffer_));
|
||
|
std::memset(fec_buffer_ ,0,sizeof(fec_buffer_ ));
|
||
|
|
||
|
while (remaining_bytes >= data_length)
|
||
|
{
|
||
|
process_block(encoder,in_stream,out_stream,data_length);
|
||
|
remaining_bytes -= data_length;
|
||
|
}
|
||
|
|
||
|
if (remaining_bytes > 0)
|
||
|
{
|
||
|
process_block(encoder,in_stream,out_stream,remaining_bytes);
|
||
|
}
|
||
|
|
||
|
in_stream.close();
|
||
|
out_stream.close();
|
||
|
}
|
||
|
|
||
|
private:
|
||
|
|
||
|
inline void process_block(const encoder_type& encoder,
|
||
|
std::ifstream& in_stream,
|
||
|
std::ofstream& out_stream,
|
||
|
const std::size_t& read_amount)
|
||
|
{
|
||
|
in_stream.read(&data_buffer_[0],static_cast<std::streamsize>(read_amount));
|
||
|
for (std::size_t i = 0; i < read_amount; ++i)
|
||
|
{
|
||
|
block_.data[i] = (data_buffer_[i] & 0xFF);
|
||
|
}
|
||
|
|
||
|
if (read_amount < data_length)
|
||
|
{
|
||
|
for (std::size_t i = read_amount; i < data_length; ++i)
|
||
|
{
|
||
|
block_.data[i] = 0x00;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
if (!encoder.encode(block_))
|
||
|
{
|
||
|
std::cout << "reed_solomon::file_encoder.process_block() - Error during encoding of block!" << std::endl;
|
||
|
return;
|
||
|
}
|
||
|
|
||
|
for (std::size_t i = 0; i < fec_length; ++i)
|
||
|
{
|
||
|
fec_buffer_[i] = static_cast<char>(block_.fec(i) & 0xFF);
|
||
|
}
|
||
|
|
||
|
out_stream.write(&data_buffer_[0],static_cast<std::streamsize>(read_amount));
|
||
|
out_stream.write(&fec_buffer_[0],fec_length);
|
||
|
}
|
||
|
|
||
|
block_type block_;
|
||
|
char data_buffer_[data_length];
|
||
|
char fec_buffer_[fec_length];
|
||
|
};
|
||
|
|
||
|
} // namespace reed_solomon
|
||
|
|
||
|
} // namespace schifra
|
||
|
|
||
|
#endif
|