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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.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <gnuradio/io_signature.h>
#include "time_deinterleave_ff_impl.h"
namespace gr {
namespace dab {
time_deinterleave_ff::sptr
time_deinterleave_ff::make(int vector_length, const std::vector<unsigned char> &scrambling_vector)
{
return gnuradio::get_initial_sptr
(new time_deinterleave_ff_impl(vector_length, scrambling_vector));
}
/*
* The private constructor
*/
time_deinterleave_ff_impl::time_deinterleave_ff_impl(int vector_length,
const std::vector<unsigned char> &scrambling_vector)
: gr::sync_block("time_deinterleave_ff",
gr::io_signature::make(1, 1, sizeof(float)),
gr::io_signature::make(1, 1, sizeof(float))),
d_vector_length(vector_length), d_scrambling_vector(scrambling_vector)
{
d_scrambling_length = scrambling_vector.size(); // size of the scrambling vector
set_output_multiple(d_vector_length);
set_history((d_scrambling_length-1)*d_vector_length + 1); //need for max delay of (scrambling_length-1) * 24ms
}
/*
* Our virtual destructor.
*/
time_deinterleave_ff_impl::~time_deinterleave_ff_impl()
{
}
int
time_deinterleave_ff_impl::work(int noutput_items,
gr_vector_const_void_star &input_items,
gr_vector_void_star &output_items)
{
const float *in = (const float *) input_items[0];
float *out = (float *) output_items[0];
for (int i = 0; i < noutput_items/d_vector_length; i++) {
// produce output vectors
for (int j = 0; j < d_vector_length; j++) {
*out++ = in[d_vector_length * (i + (d_scrambling_length - 1) - ((d_scrambling_length - 1) - d_scrambling_vector[j % d_scrambling_length])) + j];
//*out++ = in[i*d_vector_length + d_scrambling_vector[j%d_scrambling_length]*d_vector_length + j - (j%d_scrambling_length) + d_scrambling_vector[j%d_scrambling_length]];
}
}
// Tell runtime system how many output items we produced.
return noutput_items;
}
} /* namespace dab */
} /* namespace gr */
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