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57 lines
2.1 KiB
C++
57 lines
2.1 KiB
C++
///////////////////////////////////////////////////////////////////////////////////
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// Copyright (C) 2016 F4EXB //
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// written by Edouard Griffiths //
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// //
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// This program is free software; you can redistribute it and/or modify //
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// it under the terms of the GNU General Public License as published by //
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// the Free Software Foundation as version 3 of the License, or //
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// //
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// This program is distributed in the hope that it will be useful, //
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// but WITHOUT ANY WARRANTY; without even the implied warranty of //
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the //
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// GNU General Public License V3 for more details. //
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// //
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// You should have received a copy of the GNU General Public License //
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// along with this program. If not, see <http://www.gnu.org/licenses/>. //
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///////////////////////////////////////////////////////////////////////////////////
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#include "filtermbe.h"
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const float MBEAudioInterpolatorFilter::m_a0 = 3.869430E-02;
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const float MBEAudioInterpolatorFilter::m_a1 = 7.738860E-02;
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const float MBEAudioInterpolatorFilter::m_a2 = 3.869430E-02;
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const float MBEAudioInterpolatorFilter::m_b1 = 1.392667E+00;
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const float MBEAudioInterpolatorFilter::m_b2 = -5.474446E-01;
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MBEAudioInterpolatorFilter::MBEAudioInterpolatorFilter()
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{
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init();
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}
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MBEAudioInterpolatorFilter::~MBEAudioInterpolatorFilter()
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{}
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void MBEAudioInterpolatorFilter::init()
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{
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m_x[0] = 0.0f;
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m_x[1] = 0.0f;
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m_y[0] = 0.0f;
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m_y[1] = 0.0f;
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}
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float MBEAudioInterpolatorFilter::run(float sample)
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{
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float y = m_a0*sample + m_a1*m_x[0] + m_a2*m_x[1] + m_b1*m_y[0] + m_b2*m_y[1]; // this is y[n]
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m_x[1] = m_x[0];
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m_x[0] = sample;
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m_y[1] = m_y[0];
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m_y[0] = y;
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return y;
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}
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