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/*
Copyright (C) 2016
Matthias P. Braendli, matthias.braendli@mpb.li
http://opendigitalradio.org
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 2 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, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#pragma once
#include <stdint.h>
#include <deque>
#include <string>
#include <vector>
#include "ETIWriter.hpp"
#include "PFT.hpp"
namespace EdiDecoder {
struct decode_state_t {
decode_state_t(bool _complete, size_t _num_bytes_consumed) :
complete(_complete), num_bytes_consumed(_num_bytes_consumed) {}
bool complete;
size_t num_bytes_consumed;
};
class ETIDecoder {
public:
ETIDecoder(ETIWriter& eti_writer);
/* Push bytes into the decoder. The buf can contain more
* than a single packet. This is useful when reading from streams
* (files, TCP)
*/
void push_bytes(const std::vector<uint8_t> &buf);
/* Push a complete packet into the decoder. Useful for UDP and other
* datagram-oriented protocols.
*/
void push_packet(const std::vector<uint8_t> &buf);
/* Set the maximum delay in number of AF Packets before we
* abandon decoding a given pseq.
*/
void setMaxDelay(int num_af_packets);
private:
decode_state_t decode_afpacket(const std::vector<uint8_t> &input_data);
bool decode_tagpacket(const std::vector<uint8_t> &payload);
bool decode_starptr(const std::vector<uint8_t> &value);
bool decode_deti(const std::vector<uint8_t> &value);
bool decode_estn(const std::vector<uint8_t> &value, uint8_t n);
bool decode_stardmy(const std::vector<uint8_t> &value);
ETIWriter& m_eti_writer;
PFT::PFT m_pft;
uint16_t m_last_seq;
std::vector<uint8_t> m_input_data;
};
}
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