64 lines
1.4 KiB
C
64 lines
1.4 KiB
C
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#ifndef __ALGORITHM_H
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#define __ALGORITHM_H
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#include <stdint.h>
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#define FFT_N 512 //<2F><><EFBFBD>帵<EFBFBD><E5B8B5>Ҷ<EFBFBD>任<EFBFBD>ĵ<EFBFBD><C4B5><EFBFBD>
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#define START_INDEX 4 //<2F><>Ƶ<EFBFBD><C6B5><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֵ
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struct compx //<2F><><EFBFBD><EFBFBD>һ<EFBFBD><D2BB><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ṹ
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{
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float real;
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float imag;
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};
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//<2F><><EFBFBD><EFBFBD>ȡ<EFBFBD><C8A1>
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double my_floor(double x);
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//<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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double my_fmod(double x, double y);
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//<2F><><EFBFBD>Һ<EFBFBD><D2BA><EFBFBD>
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double XSin( double x );
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//<2F><><EFBFBD>Һ<EFBFBD><D2BA><EFBFBD>
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double XCos( double x );
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//<2F><>ƽ<EFBFBD><C6BD>
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int qsqrt(int a);
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/*******************************************************************
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<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ԭ<EFBFBD>ͣ<EFBFBD>struct compx EE(struct compx b1,struct compx b2)
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<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ܣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>г˷<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>嶨<EFBFBD><EFBFBD><EFBFBD>ĸ<EFBFBD><EFBFBD><EFBFBD>a,b
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<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>a<EFBFBD><EFBFBD>b<EFBFBD>ij˻<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʽ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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*******************************************************************/
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struct compx EE(struct compx a,struct compx b);
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/*****************************************************************
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<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ԭ<EFBFBD>ͣ<EFBFBD>void FFT(struct compx *xin,int N)
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<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ܣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ĸ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>п<EFBFBD><EFBFBD>ٸ<EFBFBD><EFBFBD><EFBFBD>Ҷ<EFBFBD>任<EFBFBD><EFBFBD>FFT<EFBFBD><EFBFBD>
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<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>*xin<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ṹ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַָ<EFBFBD>룬struct<EFBFBD><EFBFBD>
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*****************************************************************/
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void FFT(struct compx *xin);
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//<2F><>ȡ<EFBFBD><C8A1>ֵ
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int find_max_num_index(struct compx *data,int count);
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typedef struct
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{
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float w;
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int init;
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float a;
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}DC_FilterData;
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//ֱ<><D6B1><EFBFBD>˲<EFBFBD><CBB2><EFBFBD>
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int dc_filter(int input,DC_FilterData * df);
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typedef struct
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{
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float v0;
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float v1;
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}BW_FilterData;
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int bw_filter(int input,BW_FilterData * bw);
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#endif /*__ALGORITHM_H*/
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