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diff --git a/media/libstagefright/codecs/aacenc/inc/ms_stereo.h b/media/libstagefright/codecs/aacenc/inc/ms_stereo.h
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+++ b/media/libstagefright/codecs/aacenc/inc/ms_stereo.h
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+/*
+ ** Copyright 2003-2010, VisualOn, Inc.
+ **
+ ** Licensed under the Apache License, Version 2.0 (the "License");
+ ** you may not use this file except in compliance with the License.
+ ** You may obtain a copy of the License at
+ **
+ **     http://www.apache.org/licenses/LICENSE-2.0
+ **
+ ** Unless required by applicable law or agreed to in writing, software
+ ** distributed under the License is distributed on an "AS IS" BASIS,
+ ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ ** See the License for the specific language governing permissions and
+ ** limitations under the License.
+ */
+/*******************************************************************************
+	File:		ms_stereo.h
+
+	Content:	Declaration MS stereo processing structure and functions
+
+*******************************************************************************/
+
+#ifndef __MS_STEREO_H__
+#define __MS_STEREO_H__
+#include "typedef.h"
+
+void MsStereoProcessing(Word32       *sfbEnergyLeft,
+                        Word32       *sfbEnergyRight,
+                        const Word32 *sfbEnergyMid,
+                        const Word32 *sfbEnergySide,
+                        Word32       *mdctSpectrumLeft,
+                        Word32       *mdctSpectrumRight,
+                        Word32       *sfbThresholdLeft,
+                        Word32       *sfbThresholdRight,
+                        Word32       *sfbSpreadedEnLeft,
+                        Word32       *sfbSpreadedEnRight,
+                        Word16       *msDigest,
+                        Word16       *msMask,
+                        const Word16  sfbCnt,
+                        const Word16  sfbPerGroup,
+                        const Word16  maxSfbPerGroup,
+                        const Word16 *sfbOffset);
+
+
+#endif