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+/******************************** MPEG Audio Encoder **************************
+
+ (C) Copyright Fraunhofer IIS (1999)
+ 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.
+
+
+ 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.
+
+ $Id$
+ Initial author: M.Werner
+ contents/description: Spreading of energy
+
+******************************************************************************/
+
+#include "spreading.h"
+
+void FDKaacEnc_SpreadingMax(const INT pbCnt,
+ const FIXP_DBL *RESTRICT maskLowFactor,
+ const FIXP_DBL *RESTRICT maskHighFactor,
+ FIXP_DBL *RESTRICT pbSpreadEnergy)
+{
+ int i;
+ FIXP_DBL delay;
+
+ /* slope to higher frequencies */
+ delay = pbSpreadEnergy[0];
+ for (i=1; i<pbCnt; i++) {
+ delay = fixMax(pbSpreadEnergy[i], fMult(maskHighFactor[i], delay));
+ pbSpreadEnergy[i] = delay;
+ }
+
+ /* slope to lower frequencies */
+ delay = pbSpreadEnergy[pbCnt-1];
+ for (i=pbCnt-2; i>=0; i--) {
+ delay = fixMax(pbSpreadEnergy[i], fMult(maskLowFactor[i],delay));
+ pbSpreadEnergy[i] = delay;
+ }
+}