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/* -*- c++ -*- */
/*
* Copyright 2017 by 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_TIME_DEINTERLEAVE_FF_IMPL_H
#define INCLUDED_DAB_TIME_DEINTERLEAVE_FF_IMPL_H
#include <dab/time_deinterleave_ff.h>
namespace gr {
namespace dab {
/*! \brief applies time deinterleaving to a vector (convolutional deinterleaving -> descrambling and delay)
*
* applies convolutional deinterleaving to a vector with its max[vector_length] followers, the scrambling_vector describes which vector element comes from which follower
* delays the elements of a max delay of d_scrambling_length-1
* more information to the interleaving rules on ETSI EN 300 401 chapter 12
* this deinterleaver restores a bitstream interleaved by the block time_interleave_bb
*
* @param vector_length length of input vectors
* @param scrambling_vector vector with scrambling parameters (see DAB standard p.138)
*
*/
class time_deinterleave_ff_impl : public time_deinterleave_ff
{
private:
int d_scrambling_length, d_vector_length;
std::vector<unsigned char> d_scrambling_vector;
public:
time_deinterleave_ff_impl(int vector_length, const std::vector<unsigned char> &scrambling_vector);
~time_deinterleave_ff_impl();
// Where all the action really happens
int work(int noutput_items,
gr_vector_const_void_star &input_items,
gr_vector_void_star &output_items);
};
} // namespace dab
} // namespace gr
#endif /* INCLUDED_DAB_TIME_DEINTERLEAVE_FF_IMPL_H */
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