gr_block.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.
 */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include <gr_block.h>
#include <gr_block_detail.h>
#include <stdexcept>

static long s_next_id = 0;
static long s_ncurrently_allocated = 0;

long
gr_block_ncurrently_allocated ()
{
  return s_ncurrently_allocated;
}

gr_block::gr_block (const std::string &name,
		    gr_io_signature_sptr input_signature,
		    gr_io_signature_sptr output_signature)
  : d_name (name),
    d_input_signature (input_signature),
    d_output_signature (output_signature),
    d_output_multiple (1),
    d_relative_rate (1.0),
    d_unique_id (s_next_id++)
{
  s_ncurrently_allocated++;
}
  
gr_block::~gr_block ()
{
  s_ncurrently_allocated--;
}

// stub implementation:  1:1

void
gr_block::forecast (int noutput_items, gr_vector_int &ninput_items_required)
{
  unsigned ninputs = ninput_items_required.size ();
  for (unsigned i = 0; i < ninputs; i++)
    ninput_items_required[i] = noutput_items;
}


// default implementation

bool
gr_block::check_topology (int ninputs, int noutputs)
{
  return true;
}

void
gr_block::set_output_multiple (int multiple)
{
  if (multiple < 1)
    throw std::invalid_argument ("gr_block::set_output_multiple");

  d_output_multiple = multiple;
}

void
gr_block::set_relative_rate (double relative_rate)
{
  if (relative_rate < 0.0)
    throw std::invalid_argument ("gr_block::set_relative_rate");
  
  d_relative_rate = relative_rate;
}


void
gr_block::consume (int which_input, int how_many_items)
{
  d_detail->consume (which_input, how_many_items);
}

void
gr_block::consume_each (int how_many_items)
{
  d_detail->consume_each (how_many_items);
}