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Diffstat (limited to 'audio/softsynth/mt32/srchelper/srctools/include/SincResampler.h')
-rw-r--r-- | audio/softsynth/mt32/srchelper/srctools/include/SincResampler.h | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/audio/softsynth/mt32/srchelper/srctools/include/SincResampler.h b/audio/softsynth/mt32/srchelper/srctools/include/SincResampler.h new file mode 100644 index 0000000000..ea3f03b112 --- /dev/null +++ b/audio/softsynth/mt32/srchelper/srctools/include/SincResampler.h @@ -0,0 +1,46 @@ +/* Copyright (C) 2015-2017 Sergey V. Mikayev + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU Lesser General Public License as published by + * the Free Software Foundation, either version 2.1 of the License, or + * (at your option) 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 Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + +#ifndef SINC_RESAMPLER_H +#define SINC_RESAMPLER_H + +#include "FIRResampler.h" + +namespace SRCTools { + +class ResamplerStage; + +namespace SincResampler { + + ResamplerStage *createSincResampler(const double inputFrequency, const double outputFrequency, const double passbandFrequency, const double stopbandFrequency, const double dbSNR, const unsigned int maxUpsampleFactor); + + namespace Utils { + void computeResampleFactors(unsigned int &upsampleFactor, double &downsampleFactor, const double inputFrequency, const double outputFrequency, const unsigned int maxUpsampleFactor); + unsigned int greatestCommonDivisor(unsigned int a, unsigned int b); + } + + namespace KaizerWindow { + double estimateBeta(double dbRipple); + unsigned int estimateOrder(double dbRipple, double fp, double fs); + double bessel(const double x); + void windowedSinc(FIRCoefficient kernel[], const unsigned int order, const double fc, const double beta, const double amp); + } + +} // namespace SincResampler + +} // namespace SRCTools + +#endif // SINC_RESAMPLER_H |