tns.c

MP3 for ARM codec. [asm+C]

/* ***** 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 ([e-mail])
 * 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;
}