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diff --git a/media/libstagefright/codecs/aacdec/ms_synt.h b/media/libstagefright/codecs/aacdec/ms_synt.h
new file mode 100644
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+++ b/media/libstagefright/codecs/aacdec/ms_synt.h
@@ -0,0 +1,96 @@
+/* ------------------------------------------------------------------
+ * Copyright (C) 1998-2009 PacketVideo
+ *
+ * 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.
+ * -------------------------------------------------------------------
+ */
+/*
+
+ Pathname: ms_synt.h
+
+------------------------------------------------------------------------------
+ REVISION HISTORY
+
+ Description:  Updated to reflect new functionality of ms_synt() routine.
+ (ms_synt now only decodes one grouped scalefactor band at a time.)
+
+ Who:                       Date:
+ Description:
+------------------------------------------------------------------------------
+ INCLUDE DESCRIPTION
+
+ This file includes the function declaration for ms_synt().
+
+------------------------------------------------------------------------------
+*/
+
+/*----------------------------------------------------------------------------
+; CONTINUE ONLY IF NOT ALREADY DEFINED
+----------------------------------------------------------------------------*/
+#ifndef MS_SYNT_H
+#define MS_SYNT_H
+
+/*----------------------------------------------------------------------------
+; INCLUDES
+----------------------------------------------------------------------------*/
+#include "pv_audio_type_defs.h"
+
+/*----------------------------------------------------------------------------
+; MACROS
+; Define module specific macros here
+----------------------------------------------------------------------------*/
+
+/*----------------------------------------------------------------------------
+; DEFINES
+; Include all pre-processor statements here.
+----------------------------------------------------------------------------*/
+
+/*----------------------------------------------------------------------------
+; EXTERNAL VARIABLES REFERENCES
+; Declare variables used in this module but defined elsewhere
+----------------------------------------------------------------------------*/
+
+/*----------------------------------------------------------------------------
+; SIMPLE TYPEDEF'S
+----------------------------------------------------------------------------*/
+
+/*----------------------------------------------------------------------------
+; ENUMERATED TYPEDEF'S
+----------------------------------------------------------------------------*/
+
+/*----------------------------------------------------------------------------
+; STRUCTURES TYPEDEF'S
+----------------------------------------------------------------------------*/
+
+/*----------------------------------------------------------------------------
+; GLOBAL FUNCTION DEFINITIONS
+; Function Prototype declaration
+----------------------------------------------------------------------------*/
+
+void ms_synt(
+    const Int   wins_in_group,
+    const Int   coef_per_win,
+    const Int   num_bands,
+    const Int   band_length,
+    Int32 spectralCoefLeft[],
+    Int32 spectralCoefRight[],
+    Int   q_formatLeft[],
+    Int   q_formatRight[]);
+
+/*----------------------------------------------------------------------------
+; END
+----------------------------------------------------------------------------*/
+#endif
+
+