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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  General tonality correction detector module.
+*/
+#ifndef _TON_CORR_EST_H
+#define _TON_CORR_EST_H
+
+#include "sbr_encoder.h"
+#include "mh_det.h"
+#include "nf_est.h"
+#include "invf_est.h"
+
+
+#define MAX_NUM_PATCHES 6
+#define SCALE_NRGVEC 4
+
+/** parameter set for one single patch */
+typedef struct {
+  INT    sourceStartBand;         /*!< first band in lowbands where to take the samples from */
+  INT    sourceStopBand;          /*!< first band in lowbands which is not included in the patch anymore */
+  INT    guardStartBand;          /*!< first band in highbands to be filled with zeros in order to
+                                         reduce interferences between patches */
+  INT    targetStartBand;         /*!< first band in highbands to be filled with whitened lowband signal */
+  INT    targetBandOffs;          /*!< difference between 'startTargetBand' and 'startSourceBand' */
+  INT    numBandsInPatch;         /*!< number of consecutive bands in this one patch */
+} PATCH_PARAM;
+
+
+
+
+typedef struct
+{
+  INT switchInverseFilt;          /*!< Flag to enable dynamic adaption of invf. detection */
+  INT noQmfChannels;
+  INT bufferLength;               /*!< Length of the r and i buffers. */
+  INT stepSize;                   /*!< Stride for the lpc estimate. */
+  INT numberOfEstimates;          /*!< The total number of estiamtes, available in the quotaMatrix.*/
+  INT numberOfEstimatesPerFrame;  /*!< The number of estimates per frame available in the quotaMatrix.*/
+  INT lpcLength[2];               /*!< Segment length used for second order LPC analysis.*/
+  INT nextSample;                 /*!< Where to start the LPC analysis of the current frame.*/
+  INT move;                       /*!< How many estimates to move in the quotaMatrix, when buffering. */
+  INT frameStartIndex;            /*!< The start index for the current frame in the r and i buffers. */
+  INT startIndexMatrix;           /*!< The start index for the current frame in the quotaMatrix. */
+  INT frameStartIndexInvfEst;     /*!< The start index of the inverse filtering, not the same as the others,
+                                       dependent on what decoder is used (buffer opt, or no buffer opt). */
+  INT prevTransientFlag;          /*!< The transisent flag (from the transient detector) for the previous frame. */
+  INT transientNextFrame;         /*!< Flag to indicate that the transient will show up in the next frame. */
+  INT transientPosOffset;         /*!< An offset value to match the transient pos as calculated by the transient detector
+                                       with the actual position in the frame.*/
+
+  INT *signMatrix[MAX_NO_OF_ESTIMATES];      /*!< Matrix holding the sign of each channe, i.e. indicating in what
+                                                  part of a QMF channel a possible sine is. */
+
+  FIXP_DBL *quotaMatrix[MAX_NO_OF_ESTIMATES];/*!< Matrix holding the quota values for all estimates, all channels. */
+
+  FIXP_DBL nrgVector[MAX_NO_OF_ESTIMATES];   /*!< Vector holding the averaged energies for every QMF band. */
+  FIXP_DBL nrgVectorFreq[QMF_CHANNELS];      /*!< Vector holding the averaged energies for every QMF channel */
+
+  SCHAR indexVector[QMF_CHANNELS];           /*!< Index vector poINTing to the correct lowband channel,
+                                                  when indexing a highband channel, -1 represents a guard band */
+  PATCH_PARAM  patchParam[MAX_NUM_PATCHES];  /*!< new parameter set for patching */
+  INT    guard;                              /*!< number of guardbands between every patch */
+  INT    shiftStartSb;                       /*!< lowest subband of source range to be included in the patches */
+  INT    noOfPatches;                        /*!< number of patches */
+
+  SBR_MISSING_HARMONICS_DETECTOR sbrMissingHarmonicsDetector;  /*!< SBR_MISSING_HARMONICS_DETECTOR struct. */
+  SBR_NOISE_FLOOR_ESTIMATE sbrNoiseFloorEstimate;              /*!< SBR_NOISE_FLOOR_ESTIMATE struct. */
+  SBR_INV_FILT_EST sbrInvFilt;                                 /*!< SBR_INV_FILT_EST struct. */
+}
+SBR_TON_CORR_EST;
+
+typedef SBR_TON_CORR_EST *HANDLE_SBR_TON_CORR_EST;
+
+void
+FDKsbrEnc_TonCorrParamExtr(HANDLE_SBR_TON_CORR_EST hTonCorr,   /*!< Handle to SBR_TON_CORR struct. */
+                 INVF_MODE* infVec,                  /*!< Vector where the inverse filtering levels will be stored. */
+                 FIXP_DBL * noiseLevels,             /*!< Vector where the noise levels will be stored. */
+                 INT* missingHarmonicFlag,           /*!< Flag set to one or zero, dependent on if any strong sines are missing.*/
+                 UCHAR* missingHarmonicsIndex,       /*!< Vector indicating where sines are missing. */
+                 UCHAR* envelopeCompensation,        /*!< Vector to store compensation values for the energies in. */
+                 const SBR_FRAME_INFO *frameInfo,    /*!< Frame info struct, contains the time and frequency grid of the current frame.*/
+                 UCHAR* transientInfo,               /*!< Transient info.*/
+                 UCHAR * freqBandTable,              /*!< Frequency band tables for high-res.*/
+                 INT nSfb,                           /*!< Number of scalefactor bands for high-res. */
+                 XPOS_MODE xposType,                 /*!< Type of transposer used in the decoder.*/
+                 UINT sbrSyntaxFlags
+                 );
+
+INT
+FDKsbrEnc_CreateTonCorrParamExtr(HANDLE_SBR_TON_CORR_EST hTonCorr, /*!< Pointer to handle to SBR_TON_CORR struct. */
+                                 INT                     chan);    /*!< Channel index, needed for mem allocation */
+
+INT
+FDKsbrEnc_InitTonCorrParamExtr(INT frameSize,                      /*!< Current SBR frame size. */
+                               HANDLE_SBR_TON_CORR_EST hTonCorr,   /*!< Pointer to handle to SBR_TON_CORR struct. */
+                               HANDLE_SBR_CONFIG_DATA sbrCfg,      /*!< Pointer to SBR configuration parameters. */
+                               INT timeSlots,                      /*!< Number of time-slots per frame */
+                               INT xposCtrl,                       /*!< Different patch modes. */
+                               INT ana_max_level,                  /*!< Maximum level of the adaptive noise. */
+                               INT noiseBands,                     /*!< Number of noise bands per octave. */
+                               INT noiseFloorOffset,               /*!< Noise floor offset. */
+                               UINT useSpeechConfig                /*!< Speech or music tuning. */
+                              );
+
+void
+FDKsbrEnc_DeleteTonCorrParamExtr(HANDLE_SBR_TON_CORR_EST hTonCorr); /*!< Handle to SBR_TON_CORR struct. */
+
+
+void
+FDKsbrEnc_CalculateTonalityQuotas(HANDLE_SBR_TON_CORR_EST hTonCorr,
+                        FIXP_DBL **sourceBufferReal,
+                        FIXP_DBL **sourceBufferImag,
+                        INT usb,
+                        INT qmfScale                    /*!< sclefactor of QMF subsamples */
+                       );
+
+INT
+FDKsbrEnc_ResetTonCorrParamExtr(HANDLE_SBR_TON_CORR_EST hTonCorr, /*!< Handle to SBR_TON_CORR struct. */
+                      INT xposctrl,                     /*!< Different patch modes. */
+                      INT highBandStartSb,              /*!< Start band of the SBR range. */
+                      UCHAR *v_k_master,        /*!< Master frequency table from which all other table are derived.*/
+                      INT numMaster,                    /*!< Number of elements in the master table. */
+                      INT fs,                           /*!< Sampling frequency (of the SBR part). */
+                      UCHAR** freqBandTable,    /*!< Frequency band table for low-res and high-res. */
+                      INT* nSfb,                        /*!< Number of frequency bands (hig-res and low-res). */
+                      INT noQmfChannels                 /*!< Number of QMF channels. */
+                      );
+#endif
+