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VILLASnode/include/villas/hooks/decimate.hpp

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/** Decimate hook.
*
* @author Steffen Vogel <stvogel@eonerc.rwth-aachen.de>
* @copyright 2014-2020, Institute for Automation of Complex Power Systems, EONERC
* @license GNU General Public License (version 3)
*
* VILLASnode
*
* This program 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 of the License, or
* any later version.
*
* This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
*********************************************************************************/
#pragma once
#include <villas/hook.hpp>
/** @addtogroup hooks Hook functions
* @{
*/
namespace villas {
namespace node {
class DecimateHook : public LimitHook {
protected:
int ratio;
unsigned counter;
public:
using LimitHook::LimitHook;
virtual void setRate(double rate, double maxRate = -1)
{
assert(maxRate > 0);
int ratio = maxRate / rate;
if (ratio == 0)
ratio = 1;
setRatio(ratio);
}
void setRatio(int r)
{
ratio = r;
}
virtual void start();
virtual void parse(json_t *cfg);
virtual Hook::Reason process(sample *smp);
};
} /* namespace node */
} /* namespace villas */
/**
* @}
*/