/* -*- c++ -*- */

/*

 * Copyright 2004,2010,2012 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 <gr_float_to_char.h>

#include <gr_io_signature.h>

#include <volk/volk.h>

gr_float_to_char_sptr

gr_make_float_to_char (size_t vlen, float scale)

{

  return gnuradio::get_initial_sptr(new gr_float_to_char (vlen, scale));

}

gr_float_to_char::gr_float_to_char (size_t vlen, float scale)

  : gr_sync_block ("gr_float_to_char",

                   gr_make_io_signature (1, 1, sizeof (float)*vlen),

                   gr_make_io_signature (1, 1, sizeof (char)*vlen)),

    d_vlen(vlen), d_scale(scale)

{

  const int alignment_multiple =

    volk_get_alignment() / sizeof(char);

  set_alignment(alignment_multiple);

}

float

gr_float_to_char::scale() const

{

  return d_scale;

}

void

gr_float_to_char::set_scale(float scale)

{

  d_scale = scale;

}

int

gr_float_to_char::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];

  int8_t *out = (int8_t *) output_items[0];

  if(is_unaligned()) {

    volk_32f_s32f_convert_8i_u(out, in, d_scale, d_vlen*noutput_items);

  }

  else {

    volk_32f_s32f_convert_8i_a(out, in, d_scale, d_vlen*noutput_items);

  }

  return noutput_items;

}