gr_float_to_complex.cc

来自「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」· CC 代码 · 共 72 行

/* -*- c++ -*- */
/*
 * Copyright 2004 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_complex.h>
#include <gr_io_signature.h>

gr_float_to_complex_sptr
gr_make_float_to_complex ()
{
  return gr_float_to_complex_sptr (new gr_float_to_complex ());
}

gr_float_to_complex::gr_float_to_complex ()
  : gr_sync_block ("gr_float_to_complex",
		   gr_make_io_signature (1, 2, sizeof (float)),
		   gr_make_io_signature (1, 1, sizeof (gr_complex)))
{
}

int
gr_float_to_complex::work (int noutput_items,
			   gr_vector_const_void_star &input_items,
			   gr_vector_void_star &output_items)
{
  float	*r = (float *)input_items[0];
  float *i = (float *)input_items[1];
  gr_complex *out = (gr_complex *) output_items[0];

  switch (input_items.size ()){
  case 1:
    for (int j = 0; j < noutput_items; j++)
      out[j] = gr_complex (r[j], 0);
    break;

  case 2:
    for (int j = 0; j < noutput_items; j++)
      out[j] = gr_complex (r[j], i[j]);
    break;

  default:
    assert (0);
  }

  return noutput_items;
}