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/*************************** Fraunhofer IIS FDK Tools ***********************
(C) Copyright Fraunhofer IIS (2006)
All Rights Reserved
Please be advised that this software and/or program delivery is
Confidential Information of Fraunhofer and subject to and covered by the
Fraunhofer IIS Software Evaluation Agreement
between Google Inc. and Fraunhofer
effective and in full force since March 1, 2012.
You may use this software and/or program only under the terms and
conditions described in the above mentioned Fraunhofer IIS Software
Evaluation Agreement. Any other and/or further use requires a separate agreement.
$Id$
Author(s): M. Lohwasser
Description: fixed point abs definitions
This software and/or program is protected by copyright law and international
treaties. Any reproduction or distribution of this software and/or program,
or any portion of it, may result in severe civil and criminal penalties, and
will be prosecuted to the maximum extent possible under law.
******************************************************************************/
#ifndef _AUTOCORR_2ND_H
#define _AUTOCORR_2ND_H
#include "common_fix.h"
typedef struct {
FIXP_DBL r00r;
FIXP_DBL r11r;
FIXP_DBL r22r;
FIXP_DBL r01r;
FIXP_DBL r02r;
FIXP_DBL r12r;
FIXP_DBL r01i;
FIXP_DBL r02i;
FIXP_DBL r12i;
FIXP_DBL det;
int det_scale;
} ACORR_COEFS;
#define LPC_ORDER 2
INT
autoCorr2nd_real (ACORR_COEFS *ac, /*!< Pointer to autocorrelation coeffs */
const FIXP_DBL *reBuffer, /*!< Pointer to to real part of spectrum */
const int len /*!< Number of qmf slots */
);
INT
autoCorr2nd_cplx (ACORR_COEFS *ac, /*!< Pointer to autocorrelation coeffs */
const FIXP_DBL *reBuffer, /*!< Pointer to to real part of spectrum */
const FIXP_DBL *imBuffer, /*!< Pointer to imag part of spectrum */
const int len /*!< Number of qmf slots */
);
#endif /* _AUTOCORR_2ND_H */
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