68 lines
1.9 KiB
C
68 lines
1.9 KiB
C
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// ps.h
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//
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// Author: J.A. de Jong - ASCEE
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//
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// Description: Single sided power and cross-power spectra computation
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// routines.
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//////////////////////////////////////////////////////////////////////
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#pragma once
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#ifndef PS_H
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#define PS_H
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#include "window.h"
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struct PowerSpectra_s;
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struct AvPowerSpectra_s;
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typedef struct PowerSpectra_s PowerSpectra;
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typedef struct AvPowerSpectra_s AvPowerSpectra;
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PowerSpectra* PowerSpectra_alloc(const us nfft,
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const us nchannels,
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const WindowType wt);
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/**
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* Compute power spectra, returns to a complex array
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*
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* @param[in] timedata Time data, should be of size nfft*nchannels
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* @param [out] Cross-power spectra, array should be of size
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* (nfft/2+1) x (nchannels*nchannels), such that the cross spectra of
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* channel i with channel j at can be found as
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* getvcval(0,i+j*nchannels).
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* @return status code, SUCCESS on succes.
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*/
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int PowerSpectra_compute(const PowerSpectra*,
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const dmat* timedata,
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cmat *result);
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/**
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* Free storage of the PowerSpectra
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*/
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void PowerSpectra_free(PowerSpectra*);
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// AvPowerSpectra* AvPowerSpectra_alloc(const us nfft,
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// const us nchannels,
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// const d overlap_percentage,
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// const WindowType wt);
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/**
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* Return the current number of averages taken to obtain the result.
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*
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* @return The number of averages taken.
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*/
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us AvPowerSpectra_getAverages(const AvPowerSpectra*);
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int AvPowerSpectra_addTimeData(AvPowerSpectra*,
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const dmat* timedata);
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/**
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* Free storage of the AvPowerSpectra
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*/
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void AvPowerSpectra_free(AvPowerSpectra*);
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#endif // PS_H
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//////////////////////////////////////////////////////////////////////
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