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/*
Copyright (C) 2019
Matthias P. Braendli, matthias.braendli@mpb.li
http://www.opendigitalradio.org
EDI output,
Protection, Fragmentation and Transport. (PFT)
Are supported:
Reed-Solomon and Fragmentation
This implements part of PFT as defined ETSI TS 102 821.
*/
/*
This file is part of the ODR-mmbTools.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as
published by the Free Software Foundation, either version 3 of the
License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#pragma once
#include "config.h"
#include <vector>
#include <list>
#include <stdexcept>
#include <cstdint>
#include "AFPacket.h"
#include "Log.h"
#include "ReedSolomon.h"
#include "EDIConfig.h"
namespace edi {
typedef std::vector<uint8_t> RSBlock;
typedef std::vector<uint8_t> PFTFragment;
class PFT
{
public:
static constexpr int PARITYBYTES = 48;
PFT();
PFT(const configuration_t& conf);
// return a list of PFT fragments with the correct
// PFT headers
std::vector< PFTFragment > Assemble(AFPacket af_packet);
// Apply Reed-Solomon FEC to the AF Packet
RSBlock Protect(AFPacket af_packet);
// Cut a RSBlock into several fragments that can be transmitted
std::vector< std::vector<uint8_t> > ProtectAndFragment(AFPacket af_packet);
private:
unsigned int m_k = 207; // length of RS data word
unsigned int m_m = 3; // number of fragments that can be recovered if lost
uint16_t m_pseq = 0;
size_t m_num_chunks = 0;
bool m_verbose = false;
// Transport header is always deactivated
const bool m_transport_header = false;
const uint16_t m_addr_source = 0;
const unsigned int m_dest_port = 0;
};
}
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