111 lines
2.8 KiB
C++
111 lines
2.8 KiB
C++
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/* -*- c++ -*- */
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/*
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* Copyright 2019 Thomas Kolb.
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*
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* This is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3, or (at your option)
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* any later version.
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*
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* This software is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this software; see the file COPYING. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street,
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* Boston, MA 02110-1301, USA.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <gnuradio/io_signature.h>
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#include "symbol_interleaver_impl.h"
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namespace gr {
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namespace hamnet70 {
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symbol_interleaver::sptr
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symbol_interleaver::make(size_t interleaver_width, bool deinterleave, const std::string &length_tag)
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{
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return gnuradio::get_initial_sptr
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(new symbol_interleaver_impl(interleaver_width, deinterleave, length_tag));
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}
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/*
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* The private constructor
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*/
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symbol_interleaver_impl::symbol_interleaver_impl(size_t interleaver_width, bool deinterleave, const std::string &length_tag)
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: gr::tagged_stream_block("symbol_interleaver",
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gr::io_signature::make(1, 1, sizeof(gr_complex)),
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gr::io_signature::make(1, 1, sizeof(gr_complex)), length_tag),
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d_width(interleaver_width),
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d_deinterleave(deinterleave)
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{}
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/*
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* Our virtual destructor.
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*/
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symbol_interleaver_impl::~symbol_interleaver_impl()
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{
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}
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int
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symbol_interleaver_impl::calculate_output_stream_length(const gr_vector_int &ninput_items)
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{
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int noutput_items = ninput_items[0];
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return noutput_items ;
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}
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int
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symbol_interleaver_impl::work (int noutput_items,
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gr_vector_int &ninput_items,
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gr_vector_const_void_star &input_items,
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gr_vector_void_star &output_items)
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{
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const gr_complex *in = (const gr_complex *) input_items[0];
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gr_complex *out = (gr_complex *) output_items[0];
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size_t nitems = ninput_items[0];
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size_t ncols = d_width;
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size_t nfullcols = nitems % d_width;
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size_t nrows = nitems / d_width;
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if(nitems % nrows != 0) {
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nrows++;
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}
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size_t row = 0;
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size_t col = 0;
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for(size_t i = 0; i < nitems; i++) {
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size_t swapped_i = ncols * row + col;
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row++;
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if ((col >= nfullcols && row == (nrows-1))
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|| row == nrows) {
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col++;
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row = 0;
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}
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if(d_deinterleave) {
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out[i] = in[swapped_i];
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} else { /* interleave */
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out[swapped_i] = in[i];
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}
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}
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noutput_items = nitems;
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// Tell runtime system how many output items we produced.
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return noutput_items;
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}
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} /* namespace hamnet70 */
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} /* namespace gr */
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