gr_binary_slicer_fb.cc

这是用python语言写的一个数字广播的信号处理工具包。利用它

/* -*- c++ -*- */
/*
 * Copyright 2006 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_binary_slicer_fb.h>
#include <gr_io_signature.h>
#include <stdexcept>

gr_binary_slicer_fb_sptr
gr_make_binary_slicer_fb ()
{
  return gr_binary_slicer_fb_sptr (new gr_binary_slicer_fb ());
}

gr_binary_slicer_fb::gr_binary_slicer_fb ()
  : gr_sync_block ("binary_slicer_fb",
		   gr_make_io_signature (1, 1, sizeof (float)),
		   gr_make_io_signature (1, 1, sizeof (unsigned char)))
{
}

static inline int
slice(float x)
{
  return x < 0 ? 0 : 1;
}

int
gr_binary_slicer_fb::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++){
    out[i] = slice(in[i]);
  }
  
  return noutput_items;
}