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diff --git a/libAACenc/src/line_pe.h b/libAACenc/src/line_pe.h
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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: Perceptual entropie module
+
+******************************************************************************/
+#ifndef __LINE_PE_H
+#define __LINE_PE_H
+
+
+#include "common_fix.h"
+
+#include "psy_const.h"
+
+#define PE_CONSTPART_SHIFT  FRACT_BITS
+
+typedef struct {
+   /* calculated by FDKaacEnc_prepareSfbPe */
+   INT      sfbNLines[MAX_GROUPED_SFB];             /* number of relevant lines in sfb */
+   /* the rest is calculated by FDKaacEnc_calcSfbPe */
+   INT      sfbPe[MAX_GROUPED_SFB];                 /* pe for each sfb */
+   INT      sfbConstPart[MAX_GROUPED_SFB];          /* constant part for each sfb */
+   INT      sfbNActiveLines[MAX_GROUPED_SFB];       /* number of active lines in sfb */
+   INT      pe;                                     /* sum of sfbPe */
+   INT      constPart;                              /* sum of sfbConstPart */
+   INT      nActiveLines;                           /* sum of sfbNActiveLines */
+} PE_CHANNEL_DATA;
+
+typedef struct {
+    PE_CHANNEL_DATA peChannelData[(2)];
+    INT    pe;
+    INT    constPart;
+    INT    nActiveLines;
+    INT    offset;
+} PE_DATA;
+
+
+void FDKaacEnc_prepareSfbPe(PE_CHANNEL_DATA   *peChanData,
+                  const FIXP_DBL    *sfbEnergyLdData,
+                  const FIXP_DBL    *sfbThresholdLdData,
+                  const FIXP_DBL    *sfbFormFactorLdData,
+                  const INT         *sfbOffset,
+                  const INT         sfbCnt,
+                  const INT         sfbPerGroup,
+                  const INT         maxSfbPerGroup);
+
+void FDKaacEnc_calcSfbPe(PE_CHANNEL_DATA  *RESTRICT peChanData,
+               const FIXP_DBL   *RESTRICT sfbEnergyLdData,
+               const FIXP_DBL   *RESTRICT sfbThresholdLdData,
+               const INT        sfbCnt,
+               const INT        sfbPerGroup,
+               const INT        maxSfbPerGroup,
+               const INT       *isBook,
+               const INT       *isScale);
+
+#endif