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diff --git a/libAACenc/src/grp_data.h b/libAACenc/src/grp_data.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: Short block grouping
+
+******************************************************************************/
+#ifndef __GRP_DATA_H__
+#define __GRP_DATA_H__
+
+#include "common_fix.h"
+
+#include "psy_data.h"
+
+
+void
+FDKaacEnc_groupShortData(FIXP_DBL      *mdctSpectrum,         /* in-out */
+               SFB_THRESHOLD *sfbThreshold,         /* in-out */
+               SFB_ENERGY    *sfbEnergy,            /* in-out */
+               SFB_ENERGY    *sfbEnergyMS,          /* in-out */
+               SFB_ENERGY    *sfbSpreadEnergy,
+               const INT      sfbCnt,
+               const INT      sfbActive,
+               const INT     *sfbOffset,
+               const FIXP_DBL *sfbMinSnrLdData,
+               INT           *groupedSfbOffset,     /* out */
+               INT           *maxSfbPerGroup,
+               FIXP_DBL      *groupedSfbMinSnrLdData,
+               const INT      noOfGroups,
+               const INT     *groupLen,
+               const INT      granuleLength);
+
+#endif /* _INTERFACE_H */