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/* -*- c++ -*- */
/*
* Copyright 2005-2011,2013 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_THROTTLE_H
#define INCLUDED_GR_THROTTLE_H
#include <blocks/api.h>
#include <gr_sync_block.h>
namespace gr {
namespace blocks {
/*!
* \brief throttle flow of samples such that the average rate does
* not exceed samples_per_sec.
* \ingroup misc_blk
*
* input: one stream of itemsize; output: one stream of itemsize
*
* N.B. this should only be used in GUI apps where there is no
* other rate limiting block. It is not intended nor effective at
* precisely controlling the rate of samples. That should be
* controlled by a source or sink tied to sample clock. E.g., a
* USRP or audio card.
*/
class BLOCKS_API throttle : virtual public gr_sync_block
{
public:
typedef boost::shared_ptr<throttle> sptr;
static sptr make(size_t itemsize, double samples_per_sec);
//! Sets the sample rate in samples per second.
virtual void set_sample_rate(double rate) = 0;
//! Get the sample rate in samples per second.
virtual double sample_rate() const = 0;
};
} /* namespace blocks */
} /* namespace gr */
#endif /* INCLUDED_GR_THROTTLE_H */
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