gr_nop.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 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 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.
 */

#include <gr_nop.h>
#include <gr_io_signature.h>

gr_nop::gr_nop (size_t sizeof_stream_item)
  : gr_block ("nop",
	       gr_make_io_signature (0, -1, sizeof_stream_item),
	       gr_make_io_signature (0, -1, sizeof_stream_item))
{
}

gr_block_sptr
gr_make_nop (size_t sizeof_stream_item)
{
  return gr_block_sptr (new gr_nop (sizeof_stream_item));
}

int
gr_nop::general_work (int noutput_items,
		      gr_vector_int &ninput_items,
		      gr_vector_const_void_star &input_items,
		      gr_vector_void_star &output_items)
{
  // eat any input that's available
  for (unsigned i = 0; i < ninput_items.size (); i++)
    consume (i, ninput_items[i]);
  
  return noutput_items;
}