48 Zeilen
1.2 KiB
C
48 Zeilen
1.2 KiB
C
#ifndef cmProc5_h
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#define cmProc5_h
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#ifdef __cplusplus
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extern "C" {
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#endif
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//=======================================================================================================================
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// Goertzel Filter
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//
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typedef struct
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{
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double s0;
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double s1;
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double s2;
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double coeff;
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double hz;
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} cmGoertzelCh;
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struct cmShiftBuf_str;
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typedef struct cmGoertzel_str
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{
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cmObj obj;
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cmGoertzelCh* ch;
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unsigned chCnt;
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double srate;
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struct cmShiftBuf_str* shb;
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cmSample_t* wnd;
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} cmGoertzel;
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cmGoertzel* cmGoertzelAlloc( cmCtx* c, cmGoertzel* p, double srate, const double* fcHzV, unsigned chCnt, unsigned procSmpCnt, unsigned hopSmpCnt, unsigned wndSmpCnt );
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cmRC_t cmGoertzelFree( cmGoertzel** pp );
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cmRC_t cmGoertzelInit( cmGoertzel* p, double srate, const double* fcHzV, unsigned chCnt, unsigned procSmpCnt, unsigned hopSmpCnt, unsigned wndSmpCnt );
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cmRC_t cmGoertzelFinal( cmGoertzel* p );
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cmRC_t cmGoertzelSetFcHz( cmGoertzel* p, unsigned chIdx, double hz );
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cmRC_t cmGoertzelExec( cmGoertzel* p, const cmSample_t* in, unsigned procSmpCnt, double* outV, unsigned chCnt );
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#ifdef __cplusplus
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}
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#endif
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#endif
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