47 lines
1.7 KiB
C++
47 lines
1.7 KiB
C++
/* Copyright (C) 2015-2022 Sergey V. Mikayev
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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 Lesser General Public License as published by
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* the Free Software Foundation, either version 2.1 of the License, or
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* (at your option) any later version.
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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 Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser 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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#ifndef SRCTOOLS_SINC_RESAMPLER_H
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#define SRCTOOLS_SINC_RESAMPLER_H
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#include "FIRResampler.h"
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namespace SRCTools {
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class ResamplerStage;
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namespace SincResampler {
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ResamplerStage *createSincResampler(const double inputFrequency, const double outputFrequency, const double passbandFrequency, const double stopbandFrequency, const double dbSNR, const unsigned int maxUpsampleFactor);
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namespace Utils {
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void computeResampleFactors(unsigned int &upsampleFactor, double &downsampleFactor, const double inputFrequency, const double outputFrequency, const unsigned int maxUpsampleFactor);
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unsigned int greatestCommonDivisor(unsigned int a, unsigned int b);
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}
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namespace KaizerWindow {
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double estimateBeta(double dbRipple);
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unsigned int estimateOrder(double dbRipple, double fp, double fs);
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double bessel(const double x);
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void windowedSinc(FIRCoefficient kernel[], const unsigned int order, const double fc, const double beta, const double amp);
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}
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} // namespace SincResampler
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} // namespace SRCTools
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#endif // SRCTOOLS_SINC_RESAMPLER_H
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