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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 <string>
#include <vector>
#include <list>
#include "eti.hpp"
namespace EdiDecoder {
// Information for Frame Characterisation available in
// EDI.
//
// Number of streams is given separately, and frame length
// is calculeted in the ETIWriter
struct eti_fc_data {
bool atstf;
uint32_t tsta;
bool ficf;
uint16_t dflc;
uint8_t mid;
uint8_t fp;
uint8_t fct(void) const { return dflc % 250; }
};
// Information for a subchannel available in EDI
struct eti_stc_data {
uint8_t scid;
uint8_t sad;
uint8_t tpl;
std::vector<uint8_t> mst;
// Return the length of the MST in multiples of 64 bits
uint16_t stl(void) const { return mst.size() / 8; }
};
class ETIWriter {
public:
// Tell the ETIWriter what EDI protocol we receive in *ptr.
// This is not part of the ETI data, but is used as check
void update_protocol(
const std::string& proto,
uint16_t major,
uint16_t minor);
// Update the data for the frame characterisation
void update_fc_data(const eti_fc_data& fc_data);
void update_fic(const std::vector<uint8_t>& fic);
void update_err(uint8_t err);
// In addition to TSTA in ETI, EDI also transports more time
// stamp information.
void update_edi_time(
uint32_t utco,
uint32_t seconds);
void update_mnsc(uint16_t mnsc);
void update_rfu(uint16_t rfu);
void add_subchannel(const eti_stc_data& stc);
// Tell the ETIWriter that the AFPacket is complete
void assemble(void);
// Return the assembled ETI frame or an empty frame if not ready
std::vector<uint8_t> getEtiFrame(void);
private:
void reinit(void);
bool m_proto_valid = false;
uint8_t m_err;
bool m_fc_valid = false;
eti_fc_data m_fc;
// m_fic is valid if non-empty
std::vector<uint8_t> m_fic;
std::vector<uint8_t> m_etiFrame;
std::list<eti_stc_data> m_subchannels;
bool m_time_valid = false;
uint32_t m_utco;
uint32_t m_seconds;
uint16_t m_mnsc = 0xffff;
// 16 bits: RFU field in EOH
uint16_t m_rfu = 0xffff;
};
}
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