/* -*- c++ -*- */
/*
 * Copyright 2012 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 "char_to_short_impl.h"
#include <gr_io_signature.h>
#include <volk/volk.h>

namespace gr {
  namespace blocks {

    char_to_short::sptr char_to_short::make(size_t vlen)
    {
      return gnuradio::get_initial_sptr(new char_to_short_impl(vlen));
    }

    char_to_short_impl::char_to_short_impl(size_t vlen)
      : gr_sync_block("char_to_short",
		      gr_make_io_signature (1, -1, sizeof(char)*vlen),
		      gr_make_io_signature (1,  1, sizeof(short)*vlen)),
	d_vlen(vlen)
    {
      const int alignment_multiple =
	volk_get_alignment() / sizeof(short);
      set_alignment(std::max(1, alignment_multiple));
    }

    int
    char_to_short_impl::work(int noutput_items,
			     gr_vector_const_void_star &input_items,
			     gr_vector_void_star &output_items)
    {
      const int8_t *in = (const int8_t *) input_items[0];
      int16_t *out = (int16_t *) output_items[0];

      if(is_unaligned()) {
	volk_8i_convert_16i_u(out, in, d_vlen*noutput_items);
      }
      else {
	volk_8i_convert_16i_a(out, in, d_vlen*noutput_items);
      }

      return noutput_items;
    }

  } /* namespace blocks */
}/* namespace gr */