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/* -*- c++ -*- */
/*
* Reed-Solomon decoder for DAB+
* Copyright 2002 Phil Karn, KA9Q
* May be used under the terms of the GNU General Public License (GPL)
*
* Rewritten into a GNU Radio block for gr-dab
* Copyright 2017 Moritz Luca Schmid, Communications Engineering Lab (CEL) / Karlsruhe Institute of Technology (KIT).
*
* This 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, or (at your option)
* any later version.
*
* This software 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 software; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street,
* Boston, MA 02110-1301, USA.
*/
#ifndef INCLUDED_DAB_REED_SOLOMON_DECODE_BB_IMPL_H
#define INCLUDED_DAB_REED_SOLOMON_DECODE_BB_IMPL_H
#include <grdab/reed_solomon_decode_bb.h>
extern "C" {
#include "./fec/fec.h"
}
namespace gr {
namespace dab {
/*! \brief Reed-Solomon decoder configured for DAB+
*
* Reed Solomon RS(120, 110, t=5) with virtual interleaving; derived from RS(255, 245, t=5). Details see ETSI TS 102 563 clause 6.0 and 6.1.
*
* @param bit_rate_n data rate in multiples of 8kbit/s
*
*/
class reed_solomon_decode_bb_impl : public reed_solomon_decode_bb {
private:
int d_bit_rate_n;
int d_superframe_size;
int d_superframe_size_rs;
void *rs_handle;
uint8_t rs_packet[120];
int corr_pos[10];
int d_corrected_errors;
void DecodeSuperframe(uint8_t *sf, size_t sf_len);
public:
reed_solomon_decode_bb_impl(int bit_rate_n);
~reed_solomon_decode_bb_impl();
virtual int get_corrected_errors()
{ return d_corrected_errors; }
// Where all the action really happens
void forecast(int noutput_items, gr_vector_int &ninput_items_required);
int general_work(int noutput_items,
gr_vector_int &ninput_items,
gr_vector_const_void_star &input_items,
gr_vector_void_star &output_items);
};
} // namespace dab
} // namespace gr
#endif /* INCLUDED_DAB_REED_SOLOMON_DECODE_BB_IMPL_H */
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