gr_map_bb.cc

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/* -*- c++ -*- */
/*
 * Copyright 2006,2007 Free Software Foundation, Inc.
 * 
 * This file is part of GNU Radio
 * 
 * GNU Radio 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.
 * 
 * GNU Radio 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 GNU Radio; 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 <gr_map_bb.h>
#include <gr_io_signature.h>

gr_map_bb_sptr
gr_make_map_bb (const std::vector<int> &map)
{
  return gr_map_bb_sptr (new gr_map_bb (map));
}

gr_map_bb::gr_map_bb (const std::vector<int> &map)
  : gr_sync_block ("map_bb",
		   gr_make_io_signature (1, 1, sizeof (unsigned char)),
		   gr_make_io_signature (1, 1, sizeof (unsigned char)))
{
  for (int i = 0; i < 0x100; i++)
    d_map[i] = i;

  unsigned int size = std::min((size_t) 0x100, map.size());
  for (unsigned int i = 0; i < size; i++)
    d_map[i] = map[i];
}

int
gr_map_bb::work (int noutput_items,
		 gr_vector_const_void_star &input_items,
		 gr_vector_void_star &output_items)
{
  const unsigned char *in = (const unsigned char *) input_items[0];
  unsigned char *out = (unsigned char *) output_items[0];

  for (int i = 0; i < noutput_items; i++)
    out[i] = d_map[in[i]];
  
  return noutput_items;
}