Commit ce443713 authored by Steffen Vogel's avatar Steffen Vogel 🎅🏼

dsp: added infinitively long exponential window

parent 9829511e
/** An exponential window.
*
* @file
* @author Steffen Vogel <stvogel@eonerc.rwth-aachen.de>
* @copyright 2014-2019, Institute for Automation of Complex Power Systems, EONERC
* @license GNU General Public License (version 3)
*
* VILLAScommon
*
* 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/dsp/window.hpp>
namespace villas {
namespace dsp {
template<typename T>
class ExponentialWindow {
protected:
T a;
T last;
public:
ExponentialWindow(T _a, T i = 0) :
a(a),
last(i)
{ }
T update(T in)
{
last = a * in + (1 - a) * last;
return last;
}
};
} // namespace dsp
} // namespace villas
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