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diff --git a/libAACenc/src/psy_main.h b/libAACenc/src/psy_main.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: Psychoaccoustic major function block
+
+******************************************************************************/
+#ifndef _PSYMAIN_H
+#define _PSYMAIN_H
+
+
+#include "psy_configuration.h"
+#include "qc_data.h"
+#include "aacenc_pns.h"
+
+/*
+  psych internal
+*/
+typedef struct  {
+
+  PSY_STATIC*        psyStatic[(2)];
+
+}PSY_ELEMENT;
+
+typedef struct  {
+
+  PSY_DATA           psyData[(2)];
+  TNS_DATA           tnsData[(2)];
+  PNS_DATA           pnsData[(2)];
+
+}PSY_DYNAMIC;
+
+
+typedef struct  {
+
+  PSY_CONFIGURATION  psyConf[2]; /* LONG / SHORT */
+  PSY_ELEMENT*       psyElement[(6)];
+  PSY_STATIC*        pStaticChannels[(6)];
+  PSY_DYNAMIC*       psyDynamic;
+  INT                granuleLength;
+
+}PSY_INTERNAL;
+
+
+AAC_ENCODER_ERROR FDKaacEnc_PsyNew(PSY_INTERNAL  **phpsy,
+                                   const INT       nElements,
+                                   const INT       nChannels
+                                  ,UCHAR          *dynamic_RAM
+                                  );
+
+AAC_ENCODER_ERROR FDKaacEnc_PsyOutNew(PSY_OUT    **phpsyOut,
+                                      const INT    nElements,
+                                      const INT    nChannels,
+                                      const INT    nSubFrames
+                                     ,UCHAR       *dynamic_RAM
+                                     );
+
+AAC_ENCODER_ERROR FDKaacEnc_psyInit(PSY_INTERNAL    *hPsy,
+                                    PSY_OUT        **phpsyOut,
+                                    const INT        nSubFrames,
+                                    const INT        nMaxChannels,
+                                    const AUDIO_OBJECT_TYPE audioObjectType,
+                                    CHANNEL_MAPPING *cm);
+
+AAC_ENCODER_ERROR FDKaacEnc_psyMainInit(PSY_INTERNAL *hPsy,
+                                        AUDIO_OBJECT_TYPE audioObjectType,
+                                        CHANNEL_MAPPING *cm,
+                                        INT sampleRate,
+                                        INT granuleLength,
+                                        INT bitRate,
+                                        INT tnsMask,
+                                        INT bandwidth,
+                                        INT usePns,
+                                        INT useIS,
+                                        UINT syntaxFlags,
+                                        ULONG initFlags);
+
+AAC_ENCODER_ERROR FDKaacEnc_psyMain(INT                 channels,
+                                    PSY_ELEMENT         *psyElement,
+                                    PSY_DYNAMIC         *psyDynamic,
+                                    PSY_CONFIGURATION   *psyConf,
+                                    PSY_OUT_ELEMENT     *psyOutElement,
+                                    INT_PCM             *pInput,
+                                    INT                 *chIdx,
+                                    INT                  totalChannels
+                                   );
+
+void FDKaacEnc_PsyClose(PSY_INTERNAL   **phPsyInternal,
+                        PSY_OUT        **phPsyOut);
+
+#endif /* _PSYMAIN_H */