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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/>.
*/
#include "dabOutput/metadata.h"
#include <cstring>
#include <arpa/inet.h>
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
template <typename T>
size_t write_meta(output_metadata_id_e md, uint8_t *buf, const T value)
{
buf[0] = static_cast<uint8_t>(md);
const int16_t len_value = sizeof(T);
const uint16_t data_length = htons(len_value);
memcpy(buf + 1, &data_length, sizeof(data_length));
if (len_value == 1) {
buf[3] = value;
}
else if (len_value == 2) {
const uint16_t val = htons(value);
memcpy(buf + 3, &val, sizeof(val));
}
else if (len_value == 4) {
const uint32_t val = htonl(value);
memcpy(buf + 3, &val, sizeof(val));
}
else {
throw std::runtime_error("Unsupported metadata len " +
std::to_string(len_value));
}
return 3 + len_value;
}
size_t OutputMetadataSeparation::write(uint8_t *buf)
{
buf[0] = static_cast<uint8_t>(getId());
// Length 0
buf[1] = 0;
buf[2] = 0;
return 3;
}
size_t OutputMetadataUTCO::write(uint8_t *buf)
{
return write_meta(getId(), buf, utco);
}
size_t OutputMetadataEDITime::write(uint8_t *buf)
{
return write_meta(getId(), buf, seconds);
}
size_t OutputMetadataDLFC::write(uint8_t *buf)
{
return write_meta(getId(), buf, dlfc);
}
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