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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.
*/
#ifndef INCLUDED_GR_RUNTIME_SYNC_DECIMATOR_H
#define INCLUDED_GR_RUNTIME_SYNC_DECIMATOR_H
#include <gnuradio/api.h>
#include <gnuradio/sync_block.h>
namespace gr {
/*!
* \brief synchronous N:1 input to output with history
* \ingroup base_blk
*
* Override work to provide the signal processing implementation.
*/
class GR_RUNTIME_API sync_decimator : public sync_block
{
private:
unsigned d_decimation;
protected:
sync_decimator(void) {} // allows pure virtual interface sub-classes
sync_decimator(const std::string& name,
gr::io_signature::sptr input_signature,
gr::io_signature::sptr output_signature,
unsigned decimation);
public:
unsigned decimation() const { return d_decimation; }
void set_decimation(unsigned decimation)
{
d_decimation = decimation;
set_relative_rate(1, (uint64_t)decimation);
}
// gr::sync_decimator overrides these to assist work
void forecast(int noutput_items, gr_vector_int& ninput_items_required);
int general_work(int noutput_items,
gr_vector_int& ninput_items,
gr_vector_const_void_star& input_items,
gr_vector_void_star& output_items);
// derived classes should override work
int fixed_rate_ninput_to_noutput(int ninput);
int fixed_rate_noutput_to_ninput(int noutput);
};
} /* namespace gr */
#endif /* INCLUDED_GR_RUNTIME_SYNC_DECIMATOR_H */
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