80 lines
1.2 KiB
C
80 lines
1.2 KiB
C
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#ifndef __FILTER_H__
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#define __FILTER_H__
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#include "config.h"
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//----------------------------------------------------------
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// <20><>λֵƽ<D6B5><C6BD><EFBFBD>˲<EFBFBD><CBB2><EFBFBD>
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int MAFilter(int * pBuff, int len);
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//----------------------------------------------------------
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// <20><>Ȩ<EFBFBD><C8A8><EFBFBD><EFBFBD>ƽ<EFBFBD><C6BD><EFBFBD>˲<EFBFBD><CBB2><EFBFBD>(<28><><EFBFBD><EFBFBD>Ȩֵ)
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int WRAFilter(int * pBuff, int len);
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//----------------------------------------------------------
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// һ<><EFBFBD>ͨ<EFBFBD>˲<EFBFBD>
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typedef struct
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{
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float f1value;
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float lowpassxs;
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}LPF1stData;
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#ifdef _IN_FILTER_C
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// <20>ο<EFBFBD>Ĭ<EFBFBD><C4AC>ֵ
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const LPF1stData defaultLPF1st =
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{
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-1,
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0.5f,
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};
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#else
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extern const LPF1stData defaultLPF1st;
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#endif
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int LPF1st(LPF1stData * pLpf1st, int newData);
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//----------------------------------------------------------
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// <20><><EFBFBD><EFBFBD><EFBFBD>˲<EFBFBD>
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typedef struct
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{
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float f2value;
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//
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float b0;
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float a1;
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float a2;
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float preout;
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float lastout;
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}LPF2ndData;
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#ifdef _IN_FILTER_C
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// <20>ο<EFBFBD>Ĭ<EFBFBD><C4AC>ֵ
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// <20><>ֹƵ<D6B9><C6B5>(<28><><EFBFBD><EFBFBD>Ƶ<EFBFBD><C6B5>f0):30Hz <20><><EFBFBD><EFBFBD>Ƶ<EFBFBD><C6B5>fs:500Hz
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const LPF2ndData defaultLPF2nd =
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{
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-1,
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0.1883633f,
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1.023694f,
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0.2120577f,
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0,
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0,
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};
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#else
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extern const LPF2ndData defaultLPF2nd;
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#endif
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int LPF2nd(LPF2ndData * pLpf2nd, int newData);
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//----------------------------------------------------------
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#endif
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