ref: 4410ad69b1239491424d6d74bc48e2eda6054681
dir: /libfaac/tns.h/
/* * FAAC - Freeware Advanced Audio Coder * Copyright (C) 2001 Menno Bakker * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * * $Id: tns.h,v 1.3 2001/06/08 18:01:09 menno Exp $ */ #ifndef TNS_H #define TNS_H #ifdef __cplusplus extern "C" { #endif /* __cplusplus */ /*************************/ /* Function prototypes */ /*************************/ static void Autocorrelation(int maxOrder, /* Maximum autocorr order */ int dataSize, /* Size of the data array */ double* data, /* Data array */ double* rArray); /* Autocorrelation array */ static double LevinsonDurbin(int maxOrder, /* Maximum filter order */ int dataSize, /* Size of the data array */ double* data, /* Data array */ double* kArray); /* Reflection coeff array */ static void StepUp(int fOrder, double* kArray, double* aArray); static void QuantizeReflectionCoeffs(int fOrder,int coeffRes,double* rArray,int* indexArray); static int TruncateCoeffs(int fOrder,double threshold,double* kArray); static void TnsFilter(int length,double* spec,TnsFilterData* filter); static void TnsInvFilter(int length,double* spec,TnsFilterData* filter); void TnsInit(faacEncHandle hEncoder); void TnsEncode(TnsInfo* tnsInfo, int numberOfBands,int maxSfb,enum WINDOW_TYPE blockType, int* sfbOffsetTable,double* spec); void TnsEncodeFilterOnly(TnsInfo* tnsInfo, int numberOfBands, int maxSfb, enum WINDOW_TYPE blockType, int *sfbOffsetTable, double *spec); void TnsDecodeFilterOnly(TnsInfo* tnsInfo, int numberOfBands, int maxSfb, enum WINDOW_TYPE blockType, int *sfbOffsetTable, double *spec); #ifdef __cplusplus } #endif /* __cplusplus */ #endif /* TNS_H */