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+
+/* -----------------------------------------------------------------------------------------------------------
+Software License for The Fraunhofer FDK AAC Codec Library for Android
+
+© Copyright  1995 - 2012 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
+----------------------------------------------------------------------------------------------------------- */
+
+/*!
+  \file
+  \brief  Envelope estimation structs and prototypes  
+*/
+#ifndef __ENV_EST_H
+#define __ENV_EST_H
+
+#include "sbr_def.h"
+#include "sbr_encoder.h" /* SBR econfig structs */
+#include "ps_main.h"
+#include "bit_sbr.h"
+#include "fram_gen.h"
+#include "tran_det.h"
+#include "code_env.h"
+#include "ton_corr.h"
+
+typedef struct
+{
+  FIXP_DBL  *rBuffer[QMF_MAX_TIME_SLOTS];
+  FIXP_DBL  *iBuffer[QMF_MAX_TIME_SLOTS];
+
+  FIXP_DBL  *p_YBuffer;
+
+  FIXP_DBL  *YBuffer[QMF_MAX_TIME_SLOTS];
+  int        YBufferScale[2];
+
+  UCHAR envelopeCompensation[MAX_FREQ_COEFFS];
+  UCHAR pre_transient_info[2];
+
+
+  int YBufferWriteOffset;
+  int YBufferSzShift;
+  int rBufferReadOffset;
+
+  int no_cols;
+  int no_rows;
+  int start_index;
+
+  int time_slots;
+  int time_step;
+}
+SBR_EXTRACT_ENVELOPE;
+typedef SBR_EXTRACT_ENVELOPE *HANDLE_SBR_EXTRACT_ENVELOPE;
+
+struct ENV_CHANNEL
+{
+  SBR_TRANSIENT_DETECTOR sbrTransientDetector;
+  SBR_CODE_ENVELOPE sbrCodeEnvelope;
+  SBR_CODE_ENVELOPE sbrCodeNoiseFloor;
+  SBR_EXTRACT_ENVELOPE sbrExtractEnvelope;
+
+
+  SBR_ENVELOPE_FRAME SbrEnvFrame;
+  SBR_TON_CORR_EST   TonCorr;
+
+  struct SBR_ENV_DATA encEnvData;
+
+  int qmfScale;
+  UCHAR fLevelProtect;
+};
+typedef struct ENV_CHANNEL *HANDLE_ENV_CHANNEL;
+
+/************  Function Declarations ***************/
+
+INT
+FDKsbrEnc_CreateExtractSbrEnvelope (HANDLE_SBR_EXTRACT_ENVELOPE  hSbrCut,
+                                    INT channel
+                                   ,INT chInEl
+                                   ,UCHAR* dynamic_RAM
+                         );
+
+
+INT
+FDKsbrEnc_InitExtractSbrEnvelope (
+                          HANDLE_SBR_EXTRACT_ENVELOPE hSbr,
+                          int no_cols,
+                          int no_rows,
+                          int start_index,
+                          int time_slots, int time_step, int tran_off,
+                          ULONG statesInitFlag
+                         ,int chInEl
+                         ,UCHAR* dynamic_RAM
+                         ,UINT sbrSyntaxFlags
+                         );
+
+void FDKsbrEnc_deleteExtractSbrEnvelope (HANDLE_SBR_EXTRACT_ENVELOPE hSbrCut);
+
+typedef struct {
+    FREQ_RES res[MAX_NUM_NOISE_VALUES];
+    int maxQuantError;
+
+} SBR_FRAME_TEMP_DATA;
+
+typedef struct {
+    const SBR_FRAME_INFO *frame_info;
+    FIXP_DBL noiseFloor[MAX_NUM_NOISE_VALUES];
+    SCHAR sfb_nrg_coupling[MAX_NUM_ENVELOPE_VALUES]; /* only used if stereomode = SWITCH_L_R_C */
+    SCHAR sfb_nrg[MAX_NUM_ENVELOPE_VALUES];
+    SCHAR noise_level_coupling[MAX_NUM_NOISE_VALUES]; /* only used if stereomode = SWITCH_L_R_C */
+    SCHAR noise_level[MAX_NUM_NOISE_VALUES];
+    UCHAR transient_info[3];
+    UCHAR nEnvelopes;
+} SBR_ENV_TEMP_DATA;
+
+/*
+ * Extract features from QMF data. Afterwards, the QMF data is not required anymore.
+ */
+void
+FDKsbrEnc_extractSbrEnvelope1(
+                   HANDLE_SBR_CONFIG_DATA    h_con,
+                   HANDLE_SBR_HEADER_DATA    sbrHeaderData,
+                   HANDLE_SBR_BITSTREAM_DATA sbrBitstreamData,
+                   HANDLE_ENV_CHANNEL        h_envChan,
+                   HANDLE_COMMON_DATA        cmonData,
+                   SBR_ENV_TEMP_DATA   *eData,
+                   SBR_FRAME_TEMP_DATA *fData
+                    );
+
+
+/*
+ * Process the previously features extracted by FDKsbrEnc_extractSbrEnvelope1
+ * and create/encode SBR envelopes.
+ */
+void
+FDKsbrEnc_extractSbrEnvelope2(
+                   HANDLE_SBR_CONFIG_DATA     h_con,
+                   HANDLE_SBR_HEADER_DATA     sbrHeaderData,
+                   HANDLE_PARAMETRIC_STEREO   hParametricStereo,
+                   HANDLE_SBR_BITSTREAM_DATA  sbrBitstreamData,
+                   HANDLE_ENV_CHANNEL         sbrEnvChannel0,
+                   HANDLE_ENV_CHANNEL         sbrEnvChannel1,
+                   HANDLE_COMMON_DATA         cmonData,
+                   SBR_ENV_TEMP_DATA         *eData,
+                   SBR_FRAME_TEMP_DATA       *fData,
+                   int                        clearOutput
+                   );
+
+INT
+FDKsbrEnc_GetEnvEstDelay(HANDLE_SBR_EXTRACT_ENVELOPE hSbr);
+
+#endif