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/* -*- 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_sync_block.h>
gr_sync_block::gr_sync_block (const std::string &name,
gr_io_signature_sptr input_signature,
gr_io_signature_sptr output_signature)
: gr_block(name, input_signature, output_signature)
{
set_fixed_rate(true);
}
void
gr_sync_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] = fixed_rate_noutput_to_ninput (noutput_items);
}
int
gr_sync_block::fixed_rate_noutput_to_ninput(int noutput_items)
{
return noutput_items + history() - 1;
}
int
gr_sync_block::fixed_rate_ninput_to_noutput(int ninput_items)
{
return std::max(0, ninput_items - (int)history() + 1);
}
int
gr_sync_block::general_work (int noutput_items,
gr_vector_int &ninput_items,
gr_vector_const_void_star &input_items,
gr_vector_void_star &output_items)
{
int r = work (noutput_items, input_items, output_items);
if (r > 0)
consume_each (r);
return r;
}
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