/* -*- c++ -*- */
/* 
 * Copyright 2010, 2011, 2012, 2013 KA1RBI 
 * 
 * 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 "fsk4_slicer_fb_impl.h"
#include <stdio.h>

namespace gr {
  namespace op25_repeater {

    fsk4_slicer_fb::sptr
    fsk4_slicer_fb::make(const std::vector<float> &slice_levels)
    {
      return gnuradio::get_initial_sptr
        (new fsk4_slicer_fb_impl(slice_levels));
    }

static const int MIN_IN = 1;	// mininum number of input streams
static const int MAX_IN = 1;	// maximum number of input streams
static const int MIN_OUT = 1;	// minimum number of output streams
static const int MAX_OUT = 1;	// maximum number of output streams

    /*
     * The private constructor
     */
    fsk4_slicer_fb_impl::fsk4_slicer_fb_impl(const std::vector<float> &slice_levels)
      : gr::sync_block("fsk4_slicer_fb",
		   gr::io_signature::make (MIN_IN, MAX_IN, sizeof (float)),
		   gr::io_signature::make (MIN_OUT, MAX_OUT, sizeof (unsigned char)))
{
	d_slice_levels[0] = slice_levels[0];
	d_slice_levels[1] = slice_levels[1];
	d_slice_levels[2] = slice_levels[2];
	d_slice_levels[3] = slice_levels[3];
}

    /*
     * Our virtual destructor.
     */
    fsk4_slicer_fb_impl::~fsk4_slicer_fb_impl()
    {
    }

int 
fsk4_slicer_fb_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];
  unsigned char *out = (unsigned char *) output_items[0];

  for (int i = 0; i < noutput_items; i++){
#if 0
    if (in[i] < -2.0) {
      out[i] = 3;
    } else if (in[i] < 0.0) {
      out[i] = 2;
    } else if (in[i] <  2.0) {
      out[i] = 0;
    } else {
      out[i] = 1;
    }
#endif
    uint8_t dibit;
    float sym = in[i];
    if (d_slice_levels[3] < 0) {
      dibit = 1;
      if (d_slice_levels[3] <= sym && sym < d_slice_levels[0])
        dibit = 3;
    } else {
      dibit = 3;
      if (d_slice_levels[2] <= sym && sym < d_slice_levels[3])
        dibit = 1;
    }
    if (d_slice_levels[0] <= sym && sym < d_slice_levels[1])
      dibit = 2;
    if (d_slice_levels[1] <= sym && sym < d_slice_levels[2])
      dibit = 0;
    out[i] = dibit;
  }

  // Tell runtime system how many output items we produced.
  return noutput_items;
}

  } /* namespace op25_repeater */
} /* namespace gr */