gr_io_signature.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 2004,2007 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_io_signature.h>
#include <stdexcept>
#include <iostream>

gr_io_signature_sptr
gr_make_io_signaturev(int min_streams, int max_streams,
		      const std::vector<int> &sizeof_stream_items)
{
  return gr_io_signature_sptr (new gr_io_signature (min_streams, max_streams,
						    sizeof_stream_items));
}

gr_io_signature_sptr
gr_make_io_signature(int min_streams, int max_streams,
		     int sizeof_stream_item)
{
  std::vector<int> sizeof_items(1);
  sizeof_items[0] = sizeof_stream_item;
  return gr_make_io_signaturev(min_streams, max_streams, sizeof_items);
}

gr_io_signature_sptr
gr_make_io_signature2(int min_streams, int max_streams,
		      int sizeof_stream_item1,
		      int sizeof_stream_item2)
{
  std::vector<int> sizeof_items(2);
  sizeof_items[0] = sizeof_stream_item1;
  sizeof_items[1] = sizeof_stream_item2;
  return gr_make_io_signaturev(min_streams, max_streams, sizeof_items);
}

gr_io_signature_sptr
gr_make_io_signature3(int min_streams, int max_streams, 
		      int sizeof_stream_item1,
		      int sizeof_stream_item2,
		      int sizeof_stream_item3)
{
  std::vector<int> sizeof_items(3);
  sizeof_items[0] = sizeof_stream_item1;
  sizeof_items[1] = sizeof_stream_item2;
  sizeof_items[2] = sizeof_stream_item3;
  return gr_make_io_signaturev(min_streams, max_streams, sizeof_items);
}

// ------------------------------------------------------------------------


gr_io_signature::gr_io_signature (int min_streams, int max_streams,
				  const std::vector<int> &sizeof_stream_items)
{
  if (min_streams < 0
      || (max_streams != IO_INFINITE && max_streams < min_streams))
    throw std::invalid_argument ("gr_io_signature(1)");

  if (sizeof_stream_items.size() < 1)
    throw std::invalid_argument("gr_io_signature(2)");

  for (size_t i = 0; i < sizeof_stream_items.size(); i++){
    if (max_streams != 0 && sizeof_stream_items[i] < 1)
      throw std::invalid_argument("gr_io_signature(3)");
  }
      
  d_min_streams = min_streams;
  d_max_streams = max_streams;
  d_sizeof_stream_item = sizeof_stream_items;
}

gr_io_signature::~gr_io_signature ()
{
}

int 
gr_io_signature::sizeof_stream_item (int _index) const
{
  if (_index < 0)
      throw std::invalid_argument ("gr_io_signature::sizeof_stream_item");
    
  size_t index = _index;
  return d_sizeof_stream_item[std::min(index, d_sizeof_stream_item.size() - 1)];
}

std::vector<int>
gr_io_signature::sizeof_stream_items() const
{
  return d_sizeof_stream_item;
}