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+/* -----------------------------------------------------------------------------
+Software License for The Fraunhofer FDK AAC Codec Library for Android
+
+© Copyright  1995 - 2018 Fraunhofer-Gesellschaft zur Förderung der angewandten
+Forschung e.V. All rights reserved.
+
+ 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.
+
+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 of the MPEG
+specifications.
+
+Patent licenses for necessary patent claims for the FDK AAC Codec (including
+those of Fraunhofer) may be obtained through Via Licensing
+(www.vialicensing.com) or through the respective patent owners individually for
+the purpose of encoding or decoding bit streams in products that are compliant
+with the ISO/IEC MPEG audio standards. Please note that most manufacturers of
+Android devices already license these patent claims through Via Licensing or
+directly from the patent owners, and therefore FDK AAC Codec software may
+already be covered under those patent licenses when it is used for those
+licensed purposes only.
+
+Commercially-licensed AAC software libraries, including floating-point versions
+with enhanced sound quality, are also available from Fraunhofer. Users are
+encouraged to check the Fraunhofer website for additional applications
+information and documentation.
+
+2.    COPYRIGHT LICENSE
+
+Redistribution and use in source and binary forms, with or without modification,
+are permitted without payment of copyright license fees provided that you
+satisfy the following conditions:
+
+You must retain the complete text of this software license in redistributions of
+the FDK AAC Codec or your modifications thereto in source code form.
+
+You must retain the complete text of this software license in the documentation
+and/or other materials provided with redistributions of the FDK AAC Codec or
+your modifications thereto in binary form. You must make available free of
+charge copies of the complete source code of the FDK AAC Codec and your
+modifications thereto to recipients of copies in binary form.
+
+The name of Fraunhofer may not be used to endorse or promote products derived
+from this library without prior written permission.
+
+You may not charge copyright license fees for anyone to use, copy or distribute
+the FDK AAC Codec software or your modifications thereto.
+
+Your modified versions of the FDK AAC Codec must carry prominent notices stating
+that you changed the software and the date of any change. For modified versions
+of the FDK AAC Codec, the term "Fraunhofer FDK AAC Codec Library for Android"
+must be replaced by the term "Third-Party Modified Version of the Fraunhofer FDK
+AAC Codec Library for Android."
+
+3.    NO PATENT LICENSE
+
+NO EXPRESS OR IMPLIED LICENSES TO ANY PATENT CLAIMS, including without
+limitation the patents of Fraunhofer, ARE GRANTED BY THIS SOFTWARE LICENSE.
+Fraunhofer provides no warranty of patent non-infringement with respect to this
+software.
+
+You may use this FDK AAC Codec software or modifications thereto only for
+purposes that are authorized by appropriate patent licenses.
+
+4.    DISCLAIMER
+
+This FDK AAC Codec software is provided by Fraunhofer on behalf of the copyright
+holders and contributors "AS IS" and WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES,
+including but not limited to the implied warranties of merchantability and
+fitness for a particular purpose. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
+CONTRIBUTORS BE LIABLE for any direct, indirect, incidental, special, exemplary,
+or consequential damages, including but not limited to procurement of substitute
+goods or services; loss of use, data, or profits, or business interruption,
+however caused and on any theory of liability, whether in contract, strict
+liability, or tort (including negligence), arising in any way out of the use of
+this software, even if advised of the possibility of such damage.
+
+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
+----------------------------------------------------------------------------- */
+
+/**************************** AAC encoder library ******************************
+
+   Author(s):   M.Werner
+
+   Description: Interface psychoaccoustic/quantizer
+
+*******************************************************************************/
+
+#ifndef INTERFACE_H
+#define INTERFACE_H
+
+#include "common_fix.h"
+#include "FDK_audio.h"
+
+#include "psy_data.h"
+#include "aacenc_tns.h"
+
+enum { MS_NONE = 0, MS_SOME = 1, MS_ALL = 2 };
+
+enum { MS_ON = 1 };
+
+struct TOOLSINFO {
+  INT msDigest; /* 0 = no MS; 1 = some MS, 2 = all MS */
+  INT msMask[MAX_GROUPED_SFB];
+};
+
+typedef struct {
+  INT sfbCnt;
+  INT sfbPerGroup;
+  INT maxSfbPerGroup;
+  INT lastWindowSequence;
+  INT windowShape;
+  INT groupingMask;
+  INT sfbOffsets[MAX_GROUPED_SFB + 1];
+
+  INT mdctScale; /* number of transform shifts */
+  INT groupLen[MAX_NO_OF_GROUPS];
+
+  TNS_INFO tnsInfo;
+  INT noiseNrg[MAX_GROUPED_SFB];
+  INT isBook[MAX_GROUPED_SFB];
+  INT isScale[MAX_GROUPED_SFB];
+
+  /* memory located in QC_OUT_CHANNEL */
+  FIXP_DBL *mdctSpectrum;
+  FIXP_DBL *sfbEnergy;
+  FIXP_DBL *sfbSpreadEnergy;
+  FIXP_DBL *sfbThresholdLdData;
+  FIXP_DBL *sfbMinSnrLdData;
+  FIXP_DBL *sfbEnergyLdData;
+
+} PSY_OUT_CHANNEL;
+
+typedef struct {
+  /* information specific to each channel */
+  PSY_OUT_CHANNEL *psyOutChannel[(2)];
+
+  /* information shared by both channels  */
+  INT commonWindow;
+  struct TOOLSINFO toolsInfo;
+
+} PSY_OUT_ELEMENT;
+
+typedef struct {
+  PSY_OUT_ELEMENT *psyOutElement[((8))];
+  PSY_OUT_CHANNEL *pPsyOutChannels[(8)];
+
+} PSY_OUT;
+
+inline int isLowDelay(AUDIO_OBJECT_TYPE aot) {
+  return (aot == AOT_ER_AAC_LD || aot == AOT_ER_AAC_ELD);
+}
+
+#endif /* INTERFACE_H */