mirror of
https://github.com/dj0abr/SSB_HighSpeed_Modem.git
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139 lines
4.9 KiB
C++
139 lines
4.9 KiB
C++
/*
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(**************************************************************************)
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(* *)
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(* Schifra *)
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(* Reed-Solomon Error Correcting Code Library *)
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(* *)
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(* Release Version 0.0.1 *)
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(* http://www.schifra.com *)
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(* Copyright (c) 2000-2020 Arash Partow, All Rights Reserved. *)
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(* *)
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(* The Schifra Reed-Solomon error correcting code library and all its *)
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(* components are supplied under the terms of the General Schifra License *)
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(* agreement. The contents of the Schifra Reed-Solomon error correcting *)
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(* code library and all its components may not be copied or disclosed *)
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(* except in accordance with the terms of that agreement. *)
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(* *)
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(* URL: http://www.schifra.com/license.html *)
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(* *)
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(**************************************************************************)
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*/
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#ifndef INCLUDE_SCHIFRA_REED_SOLOMON_FILE_ENCODER_HPP
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#define INCLUDE_SCHIFRA_REED_SOLOMON_FILE_ENCODER_HPP
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#include <cstring>
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#include <iostream>
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#include <fstream>
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#include "schifra_reed_solomon_block.hpp"
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#include "schifra_reed_solomon_encoder.hpp"
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#include "schifra_fileio.hpp"
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namespace schifra
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{
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namespace reed_solomon
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{
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template <std::size_t code_length, std::size_t fec_length, std::size_t data_length = code_length - fec_length>
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class file_encoder
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{
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public:
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typedef encoder<code_length,fec_length> encoder_type;
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typedef typename encoder_type::block_type block_type;
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file_encoder(const encoder_type& encoder,
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const std::string& input_file_name,
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const std::string& output_file_name)
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{
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std::size_t remaining_bytes = schifra::fileio::file_size(input_file_name);
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if (remaining_bytes == 0)
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{
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std::cout << "reed_solomon::file_encoder() - Error: input file has ZERO size." << std::endl;
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return;
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}
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std::ifstream in_stream(input_file_name.c_str(),std::ios::binary);
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if (!in_stream)
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{
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std::cout << "reed_solomon::file_encoder() - Error: input file could not be opened." << std::endl;
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return;
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}
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std::ofstream out_stream(output_file_name.c_str(),std::ios::binary);
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if (!out_stream)
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{
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std::cout << "reed_solomon::file_encoder() - Error: output file could not be created." << std::endl;
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return;
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}
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std::memset(data_buffer_,0,sizeof(data_buffer_));
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std::memset(fec_buffer_ ,0,sizeof(fec_buffer_ ));
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while (remaining_bytes >= data_length)
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{
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process_block(encoder,in_stream,out_stream,data_length);
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remaining_bytes -= data_length;
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}
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if (remaining_bytes > 0)
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{
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process_block(encoder,in_stream,out_stream,remaining_bytes);
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}
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in_stream.close();
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out_stream.close();
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}
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private:
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inline void process_block(const encoder_type& encoder,
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std::ifstream& in_stream,
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std::ofstream& out_stream,
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const std::size_t& read_amount)
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{
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in_stream.read(&data_buffer_[0],static_cast<std::streamsize>(read_amount));
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for (std::size_t i = 0; i < read_amount; ++i)
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{
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block_.data[i] = (data_buffer_[i] & 0xFF);
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}
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if (read_amount < data_length)
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{
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for (std::size_t i = read_amount; i < data_length; ++i)
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{
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block_.data[i] = 0x00;
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}
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}
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if (!encoder.encode(block_))
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{
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std::cout << "reed_solomon::file_encoder.process_block() - Error during encoding of block!" << std::endl;
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return;
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}
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for (std::size_t i = 0; i < fec_length; ++i)
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{
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fec_buffer_[i] = static_cast<char>(block_.fec(i) & 0xFF);
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}
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out_stream.write(&data_buffer_[0],static_cast<std::streamsize>(read_amount));
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out_stream.write(&fec_buffer_[0],fec_length);
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}
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block_type block_;
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char data_buffer_[data_length];
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char fec_buffer_[fec_length];
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};
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} // namespace reed_solomon
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} // namespace schifra
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#endif
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