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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
+----------------------------------------------------------------------------------------------------------- */
+
+/***************************  Fraunhofer IIS FDK Tools  **********************
+
+   Author(s): Markus Lohwasser
+   Description: FDK Tools Hybrid Filterbank
+
+******************************************************************************/
+
+#ifndef __FDK_HYBRID_H
+#define __FDK_HYBRID_H
+
+
+
+#include "common_fix.h"
+
+/*--------------- enums -------------------------------*/
+
+/**
+ * Hybrid Filterband modes.
+ */
+typedef enum {
+    THREE_TO_TEN,
+    THREE_TO_TWELVE,
+    THREE_TO_SIXTEEN
+
+} FDK_HYBRID_MODE;
+
+
+/*--------------- structure definitions ---------------*/
+typedef struct FDK_HYBRID_SETUP *HANDLE_FDK_HYBRID_SETUP;
+
+typedef struct
+{
+  FIXP_DBL             *bufferLFReal[3];     /*!< LF real filter states. */
+  FIXP_DBL             *bufferLFImag[3];     /*!< LF imag filter states. */
+  FIXP_DBL             *bufferHFReal[13];    /*!< HF real delay lines. */
+  FIXP_DBL             *bufferHFImag[13];    /*!< HF imag delay lines. */
+
+  INT                   bufferLFpos;         /*!< Position to write incoming data into ringbuffer. */
+  INT                   bufferHFpos;         /*!< Delay line positioning. */
+  INT                   nrBands;             /*!< Number of QMF bands. */
+  INT                   cplxBands;           /*!< Number of complex QMF bands.*/
+  UCHAR                 hfMode;              /*!< Flag signalizes treatment of HF bands. */
+
+  FIXP_DBL             *pLFmemory;           /*!< Pointer to LF states buffer. */
+  FIXP_DBL             *pHFmemory;           /*!< Pointer to HF states buffer. */
+
+  UINT                  LFmemorySize;        /*!< Size of LF states buffer. */
+  UINT                  HFmemorySize;        /*!< Size of HF states buffer. */
+
+  HANDLE_FDK_HYBRID_SETUP pSetup;            /*!< Pointer to filter setup. */
+
+} FDK_ANA_HYB_FILTER;
+
+
+typedef struct
+{
+  INT                   nrBands;             /*!< Number of QMF bands. */
+  INT                   cplxBands;           /*!< Number of complex QMF bands.*/
+
+  HANDLE_FDK_HYBRID_SETUP pSetup;            /*!< Pointer to filter setup. */
+
+} FDK_SYN_HYB_FILTER;
+
+typedef FDK_ANA_HYB_FILTER *HANDLE_FDK_ANA_HYB_FILTER;
+typedef FDK_SYN_HYB_FILTER *HANDLE_FDK_SYN_HYB_FILTER;
+
+
+/**
+ * \brief  Create one instance of Hybrid Analyis Filterbank.
+ *
+ * \param hAnalysisHybFilter  Pointer to an outlying allocated Hybrid Analysis Filterbank structure.
+ * \param pLFmemory           Pointer to outlying buffer used LF filtering.
+ * \param LFmemorySize        Size of pLFmemory in bytes.
+ * \param pHFmemory           Pointer to outlying buffer used HF delay line.
+ * \param HFmemorySize        Size of pLFmemory in bytes.
+ *
+ * \return  0 on success.
+ */
+INT FDKhybridAnalysisOpen(
+        HANDLE_FDK_ANA_HYB_FILTER  hAnalysisHybFilter,
+        FIXP_DBL *const            pLFmemory,
+        const UINT                 LFmemorySize,
+        FIXP_DBL *const            pHFmemory,
+        const UINT                 HFmemorySize
+        );
+
+
+/**
+ * \brief  Initialize and configure Hybrdid Analysis Filterbank instance.
+ *
+ * \param hAnalysisHybFilter  A Hybrid Analysis Filterbank handle.
+ * \param mode                Select hybrid filter configuration.
+ * \param qmfBands            Number of qmf bands to be processed.
+ * \param cplxBands           Number of complex qmf bands to be processed.
+ * \param initStatesFlag      Indicates whether the states buffer has to be cleared.
+ *
+ * \return  0 on success.
+ */
+INT FDKhybridAnalysisInit(
+        HANDLE_FDK_ANA_HYB_FILTER  hAnalysisHybFilter,
+        const FDK_HYBRID_MODE      mode,
+        const INT                  qmfBands,
+        const INT                  cplxBands,
+        const INT                  initStatesFlag
+        );
+
+
+/**
+ * \brief  Adjust Hybrdid Analysis Filterbank states.
+ *
+ * \param hAnalysisHybFilter  A Hybrid Analysis Filterbank handle.
+ * \param scalingValue        Scaling value to be applied on filter states.
+ *
+ * \return  0 on success.
+ */
+INT FDKhybridAnalysisScaleStates(
+        HANDLE_FDK_ANA_HYB_FILTER  hAnalysisHybFilter,
+        const INT                  scalingValue
+        );
+
+
+/**
+ * \brief  Apply Hybrid Analysis Filterbank on Qmf input data.
+ *
+ * \param hAnalysisHybFilter  A Hybrid Analysis Filterbank handle.
+ * \param pQmfReal            Qmf input data.
+ * \param pQmfImag            Qmf input data.
+ * \param pHybridReal         Hybrid output data.
+ * \param pHybridImag         Hybrid output data.
+ *
+ * \return  0 on success.
+ */
+INT FDKhybridAnalysisApply(
+        HANDLE_FDK_ANA_HYB_FILTER  hAnalysisHybFilter,
+        const FIXP_DBL *const      pQmfReal,
+        const FIXP_DBL *const      pQmfImag,
+        FIXP_DBL *const            pHybridReal,
+        FIXP_DBL *const            pHybridImag
+        );
+
+
+/**
+ * \brief  Close a Hybrid Analysis Filterbank instance.
+ *
+ * \param hAnalysisHybFilter  Pointer to a Hybrid Analysis Filterbank instance.
+ *
+ * \return  0 on success.
+ */
+INT FDKhybridAnalysisClose(
+        HANDLE_FDK_ANA_HYB_FILTER  hAnalysisHybFilter
+        );
+
+/**
+ * \brief  Initialize and configure Hybrdid Synthesis Filterbank instance.
+ *
+ * \param hSynthesisHybFilter A Hybrid Synthesis Filterbank handle.
+ * \param mode                Select hybrid filter configuration.
+ * \param qmfBands            Number of qmf bands to be processed.
+ * \param cplxBands           Number of complex qmf bands to be processed.
+ *
+ * \return  0 on success.
+ */
+INT FDKhybridSynthesisInit(
+        HANDLE_FDK_SYN_HYB_FILTER  hSynthesisHybFilter,
+        const FDK_HYBRID_MODE      mode,
+        const INT                  qmfBands,
+        const INT                  cplxBands
+        );
+
+/**
+ * \brief  Apply Hybrid Analysis Filterbank on Hybrid data.
+ *
+ * \param hSynthesisHybFilter  A Hybrid Analysis Filterbandk handle.
+ * \param pHybridReal          Hybrid input data.
+ * \param pHybridImag          Hybrid input data.
+ * \param pQmfReal             Qmf output data.
+ * \param pQmfImag             Qmf output data.
+ *
+ * \return  0 on success.
+ */
+INT FDKhybridSynthesisApply(
+        HANDLE_FDK_SYN_HYB_FILTER  hSynthesisHybFilter,
+        const FIXP_DBL *const      pHybridReal,
+        const FIXP_DBL *const      pHybridImag,
+        FIXP_DBL *const            pQmfReal,
+        FIXP_DBL *const            pQmfImag
+        );
+
+
+#endif /* __FDK_HYBRID_H */