/* ***** BEGIN LICENSE BLOCK *****   * Source last modified: $Id: tns.c,v 1.1 2005/02/26 01:47:34 jrecker Exp $  *    * Portions Copyright (c) 1995-2005 RealNetworks, Inc. All Rights Reserved.   *        * The contents of this file, and the files included with this file,  * are subject to the current version of the RealNetworks Public  * Source License (the "RPSL") available at  * http://www.helixcommunity.org/content/rpsl unless you have licensed  * the file under the current version of the RealNetworks Community  * Source License (the "RCSL") available at  * http://www.helixcommunity.org/content/rcsl, in which case the RCSL  * will apply. You may also obtain the license terms directly from  * RealNetworks.  You may not use this file except in compliance with  * the RPSL or, if you have a valid RCSL with RealNetworks applicable  * to this file, the RCSL.  Please see the applicable RPSL or RCSL for  * the rights, obligations and limitations governing use of the  * contents of the file.  *    * This file is part of the Helix DNA Technology. RealNetworks is the  * developer of the Original Code and owns the copyrights in the  * portions it created.  *    * This file, and the files included with this file, is distributed  * and made available on an 'AS IS' basis, WITHOUT WARRANTY OF ANY  * KIND, EITHER EXPRESS OR IMPLIED, AND REALNETWORKS HEREBY DISCLAIMS  * ALL SUCH WARRANTIES, INCLUDING WITHOUT LIMITATION, ANY WARRANTIES  * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, QUIET  * ENJOYMENT OR NON-INFRINGEMENT.  *   * Technology Compatibility Kit Test Suite(s) Location:   *    http://www.helixcommunity.org/content/tck   *   * Contributor(s):   *    * ***** END LICENSE BLOCK ***** */  /************************************************************************************** * Fixed-point AAC decoder using Intel IPP libraries * Jon Recker (jrecker@real.com) * February 2005 * * tns.c - apply TNS to spectrum **************************************************************************************/#include "coder.h"	/************************************************************************************** * Function:    TNSFilter * * Description: apply temporal noise shaping, if enabled * * Inputs:      valid AACDecInfo struct *              index of current channel * * Outputs:     updated transform coefficients * * Return:      0 if successful, -1 if error **************************************************************************************/int TNSFilter(AACDecInfo *aacDecInfo, int ch){	PSInfoBase *psi;	IppStatus err;	IppAACChanInfo *chanInfo;	IppAACIcsInfo *icsInfo;	/* validate pointers */	if (!aacDecInfo || !aacDecInfo->psInfoBase)		return -1;	psi = (PSInfoBase *)(aacDecInfo->psInfoBase);	chanInfo = &(psi->chanInfo[ch]); 	icsInfo = chanInfo->pIcsInfo;	if (chanInfo->tnsDataPres) {		err = ippsDecodeTNS_AAC_32s_I(psi->coef[ch], chanInfo->pTnsNumFilt, chanInfo->pTnsRegionLen, 			chanInfo->pTnsFiltOrder, chanInfo->pTnsFiltCoefRes, psi->tnsCoef[ch], chanInfo->pTnsDirection, 			icsInfo->maxSfb, aacDecInfo->profile, psi->sampRateIdx, chanInfo->winLen); 		if (err)			return -1;	}	return 0;}