gri_float_to_short.cc

gnuradio软件无线电源程序.现在的手机多基于软件无线电

/* -*- c++ -*- */
/*
 * Copyright 2002 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 2, 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., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 */

#define _ISOC9X_SOURCE
#include <gri_float_to_short.h>
#include <math.h>

static const int MIN_SHORT = -32768;
static const int MAX_SHORT =  32767;


void 
gri_float_to_short (const float *in, short *out, int nsamples)
{
  for (int i = 0; i < nsamples; i++){
    long int r = (long int) rint (in[i]);
    if (r < MIN_SHORT)
      r = MIN_SHORT;
    else if (r > MAX_SHORT)
      r = MAX_SHORT;
    out[i] = r;
  }
}