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/*
Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009 Her Majesty the Queen in
Right of Canada (Communications Research Center Canada)
Copyright (C) 2017
Matthias P. Braendli, matthias.braendli@mpb.li
http://www.opendigitalradio.org
The metadata support for the outputs.
*/
/*
This file is part of ODR-DabMux.
ODR-DabMux 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.
ODR-DabMux 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 ODR-DabMux. If not, see <http://www.gnu.org/licenses/>.
*/
#pragma once
#include "Log.h"
/* Some outputs support additional metadata to be carried
* next to the main ETI stream. This metadata always has the
* following format:
* Field: | id | len | value |
* Length: 1 2 depending on id
*
* Multi-byte values are transmitted in network byte order.
*/
enum class output_metadata_id_e {
// Contains no value, can be used to group fields
separation_marker = 0,
// TAI-UTC offset, value is int16_t.
utc_offset = 1,
/* EDI Time is the number of SI seconds since 2000-01-01 T 00:00:00 UTC.
* value is an uint32_t */
edi_time = 2,
/* The DLFC field from the EDI TAG deti. value is uint16_t */
dlfc = 3,
};
struct OutputMetadata {
virtual ~OutputMetadata() {};
virtual output_metadata_id_e getId(void) const = 0;
virtual size_t getLength(void) const = 0;
/* Write the value in the metadata format to the buffer.
* Returns number of bytes written. The buffer buf needs
* to be large enough to contain the value;
*/
virtual size_t write(uint8_t *buf) = 0;
};
struct OutputMetadataSeparation : public OutputMetadata {
explicit OutputMetadataSeparation() {}
output_metadata_id_e getId(void) const { return output_metadata_id_e::separation_marker; }
virtual size_t getLength(void) const { return 3; }
virtual size_t write(uint8_t *buf);
};
struct OutputMetadataUTCO : public OutputMetadata {
explicit OutputMetadataUTCO(int16_t utco) : utco(utco) {}
output_metadata_id_e getId(void) const { return output_metadata_id_e::utc_offset; }
virtual size_t getLength(void) const { return 5; }
virtual size_t write(uint8_t *buf);
int16_t utco;
};
struct OutputMetadataEDITime : public OutputMetadata {
explicit OutputMetadataEDITime(uint32_t seconds) : seconds(seconds) {}
output_metadata_id_e getId(void) const { return output_metadata_id_e::edi_time; }
virtual size_t getLength(void) const { return 7; }
virtual size_t write(uint8_t *buf);
uint32_t seconds;
};
struct OutputMetadataDLFC : public OutputMetadata {
explicit OutputMetadataDLFC(uint16_t dlfc) : dlfc(dlfc) {}
output_metadata_id_e getId(void) const { return output_metadata_id_e::dlfc; }
virtual size_t getLength(void) const { return 5; }
virtual size_t write(uint8_t *buf);
uint16_t dlfc;
};
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