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/* -*- c++ -*- */
/*
* Copyright 2004,2013 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 <gnuradio/sync_block.h>
namespace gr {
sync_block::sync_block(const std::string& name,
io_signature::sptr input_signature,
io_signature::sptr output_signature)
: block(name, input_signature, output_signature)
{
set_fixed_rate(true);
}
void 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 sync_block::fixed_rate_noutput_to_ninput(int noutput_items)
{
return noutput_items + history() - 1;
}
int sync_block::fixed_rate_ninput_to_noutput(int ninput_items)
{
return std::max(0, ninput_items - (int)history() + 1);
}
int 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;
}
} /* namespace gr */
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