71 lines
2 KiB
C
71 lines
2 KiB
C
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/******************************************************************************
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* sigproc.h *
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*-----------*
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* I/O library functions for extended speech files (vapi format)
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*------------------------------------------------------------------------------
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* Copyright (C) 1999 Entropic, Inc
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* Copyright (C) 2000 Microsoft Corporation Date: 03/02/00
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* All Rights Reserved
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*
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********************************************************************* PACOG ***/
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#ifndef _SIGPROC_H_
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#define _SIGPROC_H_
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#ifndef M_PI
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#define M_PI 3.14159265358979323846
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#endif
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#define LN2 0.6931471806
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inline int LpcOrder( int p)
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{
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return (int)((p / 1000.0) + 2.5);
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}
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enum {LPC_ALFA=0, LPC_PARCOR} ;
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enum {WINDOW_HAMM, WINDOW_HANN, WINDOW_BLACK, WINDOW_RECT, WINDOW_BART};
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double* ComputeWindow (int iType, int iSize, bool bSymmetric);
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int WindowSignal (double* pdSamples, int iNumSamples, int iType, bool bSymmetric);
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double* GetDurbinCoef (double* pdData, int iNumData, int iOrder, int iCoefType, double *pdError);
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double* Autocor (double* x, int m, int iOrder);
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double* DurbinRecursion (double* pdAutoc, int iOrder, int iCoefType, double *pdError);
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void ParcorFilterSyn (double* pdData, int iNumData, double* pdParcor, double* pdMemory, int iOrder);
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void ParcorFilterAn (double* pdData, int iNumData, double* pdParcor, double* pdMemory, int iOrder);
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bool ParcorToAlfa (double* pdParcor, double* pdAlfa, int iOrder);
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double* Cepstrum (double *pdData, int iNumData, int iLpcOrder, int iCepOrder);
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void Alfa2Cepstrum (double* pdAlfa, int iNumAlfa, double* pdCepstrum, int iNumCepstrum);
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double EuclideanDist (double c1[], double c2[], int iLen);
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double Energy (double* pdData, int iNumData, int iWindType);
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int RemoveDc (double* pdSamples, int iNumSamples);
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int Resample (double* pdOriginal, int iNumOrig,
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int iInSampFreq, int iOutSampFreq,
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double** pdResampled, int* iNumResamp);
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int NonIntegerDelay (double* pdSamples, int iNumSamples, double dDelay);
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#endif
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