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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 */