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annotate src/dmfft.h @ 2295:046056326041

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author Matti Hamalainen <ccr@tnsp.org>
date Wed, 03 Jul 2019 13:57:42 +0300
parents 1e5cf1144f36
children
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1 #ifndef DMFFT_H
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2 #define DMFFT_H 1
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3
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4 #include "dmlib.h"
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5
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6
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7 typedef double DMFFTType;
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8
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9
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10 typedef struct
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11 {
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12 int npoints;
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13 DMFFTType *sinTable;
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14 int *breversed;
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15 } DMFFTContext;
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18 int dmInitializeFFT(DMFFTContext *, int);
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19 void dmEndFFT(DMFFTContext *);
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20 int dmRealFFT(DMFFTContext *, DMFFTType *);
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22 int dmConvertFFTtoFreqDomain(DMFFTContext *ctx, DMFFTType *buffer,
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23 DMFFTType *real, DMFFTType *imag);
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25 int dmConvertFFTtoFreqAndPower(DMFFTContext *ctx, DMFFTType *buffer,
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26 DMFFTType *real, DMFFTType *imag, DMFFTType *power, const DMFFTType scale);
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28 int dmConvertFFTtoPowerAndSum(DMFFTContext *ctx, DMFFTType *buffer,
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29 DMFFTType *power, const DMFFTType pscale, DMFFTType *sum, const DMFFTType sscale);
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31 int dmConvertFFTtoTimeDomain(DMFFTContext *ctx, DMFFTType *buffer, DMFFTType *tdom);
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34 #endif // DMFFT_H