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diff --git a/libSBRdec/src/env_extr.cpp b/libSBRdec/src/env_extr.cpp
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--- a/libSBRdec/src/env_extr.cpp
+++ b/libSBRdec/src/env_extr.cpp
@@ -1,31 +1,89 @@
-/****************************************************************************
- (C) Copyright Fraunhofer IIS (2005)
- All Rights Reserved
+/* -----------------------------------------------------------------------------------------------------------
+Software License for The Fraunhofer FDK AAC Codec Library for Android
- Please be advised that this software and/or program delivery is
- Confidential Information of Fraunhofer and subject to and covered by the
+© Copyright 1995 - 2012 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
+ All rights reserved.
- Fraunhofer IIS Software Evaluation Agreement
- between Google Inc. and Fraunhofer
- effective and in full force since March 1, 2012.
+ 1. INTRODUCTION
+The Fraunhofer FDK AAC Codec Library for Android ("FDK AAC Codec") is software that implements
+the MPEG Advanced Audio Coding ("AAC") encoding and decoding scheme for digital audio.
+This FDK AAC Codec software is intended to be used on a wide variety of Android devices.
- 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.
+AAC's HE-AAC and HE-AAC v2 versions are regarded as today's most efficient general perceptual
+audio codecs. AAC-ELD is considered the best-performing full-bandwidth communications codec by
+independent studies and is widely deployed. AAC has been standardized by ISO and IEC as part
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+Patent licenses for necessary patent claims for the FDK AAC Codec (including those of Fraunhofer)
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- $Id$
+2. COPYRIGHT LICENSE
+
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+5. CONTACT INFORMATION
+
+Fraunhofer Institute for Integrated Circuits IIS
+Attention: Audio and Multimedia Departments - FDK AAC LL
+Am Wolfsmantel 33
+91058 Erlangen, Germany
+
+www.iis.fraunhofer.de/amm
+amm-info@iis.fraunhofer.de
+----------------------------------------------------------------------------------------------------------- */
-*******************************************************************************/
/*!
\file
- \brief Envelope extraction $Revision: 38006 $
+ \brief Envelope extraction
The functions provided by this module are mostly called by applySBR(). After it is
determined that there is valid SBR data, sbrGetHeaderData() might be called if the current
SBR data contains an \ref SBR_HEADER_ELEMENT as opposed to a \ref SBR_STANDARD_ELEMENT. This function