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107 lines
3.5 KiB
C++
107 lines
3.5 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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#ifndef SDRBASE_DSP_HBFILTERTRAITS_H_
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#define SDRBASE_DSP_HBFILTERTRAITS_H_
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#include <stdint.h>
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// uses Q1.14 format internally, input and output are S16
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/*
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* supported filter orders: 96, 80, 64, 48, 32
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* any usage of another value will be prevented by compilation errors
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*/
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template<uint32_t HBFilterOrder>
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struct HBFIRFilterTraits
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{
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};
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template<>
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struct HBFIRFilterTraits<16>
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{
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static const int32_t hbOrder = 16;
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static const int32_t hbShift = 14;
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static const int16_t hbMod[16+6];
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static const int32_t hbCoeffs[4] __attribute__ ((aligned (16)));
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};
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template<>
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struct HBFIRFilterTraits<32>
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{
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static const int32_t hbOrder = 32;
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static const int32_t hbShift = 14;
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static const int16_t hbMod[32+6];
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static const int32_t hbCoeffs[8] __attribute__ ((aligned (32)));
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};
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template<>
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struct HBFIRFilterTraits<48>
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{
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static const int32_t hbOrder = 48;
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static const int32_t hbShift = 14;
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static const int16_t hbMod[48+6];
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static const int32_t hbCoeffs[12] __attribute__ ((aligned (16)));
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};
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template<>
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struct HBFIRFilterTraits<64>
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{
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static const int32_t hbOrder = 64;
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static const int32_t hbShift = 14;
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static const int16_t hbMod[64+6];
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static const int32_t hbCoeffs[16] __attribute__ ((aligned (32)));
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};
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template<>
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struct HBFIRFilterTraits<80>
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{
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static const int32_t hbOrder = 80;
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static const int32_t hbShift = 14;
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static const int16_t hbMod[80+6];
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static const int32_t hbCoeffs[20] __attribute__ ((aligned (16)));
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};
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template<>
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struct HBFIRFilterTraits<96>
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{
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static const int32_t hbOrder = 96;
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static const int32_t hbShift = 16;
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static const int16_t hbMod[96+6];
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static const int32_t hbCoeffs[24] __attribute__ ((aligned (32)));
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};
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template<>
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struct HBFIRFilterTraits<112>
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{
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static const int32_t hbOrder = 112;
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static const int32_t hbShift = 19;
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static const int16_t hbMod[112+6];
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static const int32_t hbCoeffs[28] __attribute__ ((aligned (16)));
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};
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template<>
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struct HBFIRFilterTraits<128>
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{
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static const int32_t hbOrder = 128;
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static const int32_t hbShift = 19;
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static const int16_t hbMod[128+6];
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static const int32_t hbCoeffs[32] __attribute__ ((aligned (16)));
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};
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#endif /* SDRBASE_DSP_HBFILTERTRAITS_H_ */
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