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      1 
      2 /* -----------------------------------------------------------------------------------------------------------
      3 Software License for The Fraunhofer FDK AAC Codec Library for Android
      4 
      5  Copyright  1995 - 2012 Fraunhofer-Gesellschaft zur Frderung der angewandten Forschung e.V.
      6   All rights reserved.
      7 
      8  1.    INTRODUCTION
      9 The Fraunhofer FDK AAC Codec Library for Android ("FDK AAC Codec") is software that implements
     10 the MPEG Advanced Audio Coding ("AAC") encoding and decoding scheme for digital audio.
     11 This FDK AAC Codec software is intended to be used on a wide variety of Android devices.
     12 
     13 AAC's HE-AAC and HE-AAC v2 versions are regarded as today's most efficient general perceptual
     14 audio codecs. AAC-ELD is considered the best-performing full-bandwidth communications codec by
     15 independent studies and is widely deployed. AAC has been standardized by ISO and IEC as part
     16 of the MPEG specifications.
     17 
     18 Patent licenses for necessary patent claims for the FDK AAC Codec (including those of Fraunhofer)
     19 may be obtained through Via Licensing (www.vialicensing.com) or through the respective patent owners
     20 individually for the purpose of encoding or decoding bit streams in products that are compliant with
     21 the ISO/IEC MPEG audio standards. Please note that most manufacturers of Android devices already license
     22 these patent claims through Via Licensing or directly from the patent owners, and therefore FDK AAC Codec
     23 software may already be covered under those patent licenses when it is used for those licensed purposes only.
     24 
     25 Commercially-licensed AAC software libraries, including floating-point versions with enhanced sound quality,
     26 are also available from Fraunhofer. Users are encouraged to check the Fraunhofer website for additional
     27 applications information and documentation.
     28 
     29 2.    COPYRIGHT LICENSE
     30 
     31 Redistribution and use in source and binary forms, with or without modification, are permitted without
     32 payment of copyright license fees provided that you satisfy the following conditions:
     33 
     34 You must retain the complete text of this software license in redistributions of the FDK AAC Codec or
     35 your modifications thereto in source code form.
     36 
     37 You must retain the complete text of this software license in the documentation and/or other materials
     38 provided with redistributions of the FDK AAC Codec or your modifications thereto in binary form.
     39 You must make available free of charge copies of the complete source code of the FDK AAC Codec and your
     40 modifications thereto to recipients of copies in binary form.
     41 
     42 The name of Fraunhofer may not be used to endorse or promote products derived from this library without
     43 prior written permission.
     44 
     45 You may not charge copyright license fees for anyone to use, copy or distribute the FDK AAC Codec
     46 software or your modifications thereto.
     47 
     48 Your modified versions of the FDK AAC Codec must carry prominent notices stating that you changed the software
     49 and the date of any change. For modified versions of the FDK AAC Codec, the term
     50 "Fraunhofer FDK AAC Codec Library for Android" must be replaced by the term
     51 "Third-Party Modified Version of the Fraunhofer FDK AAC Codec Library for Android."
     52 
     53 3.    NO PATENT LICENSE
     54 
     55 NO EXPRESS OR IMPLIED LICENSES TO ANY PATENT CLAIMS, including without limitation the patents of Fraunhofer,
     56 ARE GRANTED BY THIS SOFTWARE LICENSE. Fraunhofer provides no warranty of patent non-infringement with
     57 respect to this software.
     58 
     59 You may use this FDK AAC Codec software or modifications thereto only for purposes that are authorized
     60 by appropriate patent licenses.
     61 
     62 4.    DISCLAIMER
     63 
     64 This FDK AAC Codec software is provided by Fraunhofer on behalf of the copyright holders and contributors
     65 "AS IS" and WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, including but not limited to the implied warranties
     66 of merchantability and fitness for a particular purpose. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
     67 CONTRIBUTORS BE LIABLE for any direct, indirect, incidental, special, exemplary, or consequential damages,
     68 including but not limited to procurement of substitute goods or services; loss of use, data, or profits,
     69 or business interruption, however caused and on any theory of liability, whether in contract, strict
     70 liability, or tort (including negligence), arising in any way out of the use of this software, even if
     71 advised of the possibility of such damage.
     72 
     73 5.    CONTACT INFORMATION
     74 
     75 Fraunhofer Institute for Integrated Circuits IIS
     76 Attention: Audio and Multimedia Departments - FDK AAC LL
     77 Am Wolfsmantel 33
     78 91058 Erlangen, Germany
     79 
     80 www.iis.fraunhofer.de/amm
     81 amm-info (at) iis.fraunhofer.de
     82 ----------------------------------------------------------------------------------------------------------- */
     83 
     84 /*!
     85   \file
     86   \brief  Sbr decoder
     87 */
     88 #ifndef __SBR_DEC_H
     89 #define __SBR_DEC_H
     90 
     91 #include "sbrdecoder.h"
     92 
     93 #include "lpp_tran.h"
     94 #include "qmf.h"
     95 #include "env_calc.h"
     96 #include "FDK_audio.h"
     97 
     98 
     99 #include "sbrdec_drc.h"
    100 
    101 #define SACDEC_ALIGNMENT_FIX
    102 
    103 typedef struct
    104 {
    105   QMF_FILTER_BANK     AnalysiscQMF;
    106   QMF_FILTER_BANK     SynthesisQMF;
    107 
    108   SBR_CALCULATE_ENVELOPE  SbrCalculateEnvelope;
    109   SBR_LPP_TRANS           LppTrans;
    110 
    111   QMF_SCALE_FACTOR sbrScaleFactor;
    112   QMF_SCALE_FACTOR sbrScaleFactorRight;
    113 
    114   /*! Delayed spectral data needed for the dynamic framing of SBR. Not required in case of CLDFB */
    115   FIXP_DBL * pSbrOverlapBuffer;
    116 
    117   /* References to workbuffers */
    118   FIXP_DBL * WorkBuffer1;
    119   FIXP_DBL * WorkBuffer2;
    120 
    121   /* QMF filter states */
    122   FIXP_QAS   anaQmfStates[(320)];
    123   FIXP_QSS * pSynQmfStates;
    124 
    125   /* Reference pointer arrays for QMF time slots,
    126      mixed among overlap and current slots. */
    127   FIXP_DBL * QmfBufferReal[(((1024)/(32))+(6))];
    128   FIXP_DBL * QmfBufferImag[(((1024)/(32))+(6))];
    129   int useLP;
    130 
    131   /* QMF domain extension time slot reference pointer array */
    132 
    133   SBRDEC_DRC_CHANNEL  sbrDrcChannel;
    134 
    135 } SBR_DEC;
    136 
    137 typedef SBR_DEC *HANDLE_SBR_DEC;
    138 
    139 
    140 typedef struct
    141 {
    142   SBR_FRAME_DATA      frameData[(1)+1];
    143   SBR_PREV_FRAME_DATA prevFrameData;
    144   SBR_DEC SbrDec;
    145 }
    146 SBR_CHANNEL;
    147 
    148 typedef SBR_CHANNEL *HANDLE_SBR_CHANNEL;
    149 
    150 void
    151 SbrDecodeAndProcess (HANDLE_SBR_DEC hSbrDec,
    152                      INT_PCM *timeIn,
    153                      HANDLE_SBR_HEADER_DATA hHeaderData,
    154                      HANDLE_SBR_FRAME_DATA hFrameData,
    155                      HANDLE_SBR_PREV_FRAME_DATA hPrevFrameData,
    156                      int applyProcessing,
    157                      int channelNr
    158                      , UCHAR useLP
    159                      );
    160 
    161 
    162 void
    163 SbrConstructTimeOutput (HANDLE_SBR_DEC hSbrDec,            /*!< handle to Decoder channel */
    164                         INT_PCM *timeOut,                    /*!< pointer to output time signal */
    165                         HANDLE_SBR_HEADER_DATA hHeaderData,/*!< Static control data */
    166                         HANDLE_SBR_PREV_FRAME_DATA hPrevFrameData,  /*!< Some control data of last frame */
    167                         int channelNr
    168                        ,UCHAR useLP
    169                         );
    170 
    171 
    172 void
    173 sbr_dec (HANDLE_SBR_DEC hSbrDec,            /*!< handle to Decoder channel */
    174          INT_PCM *timeIn,                   /*!< pointer to input time signal */
    175          INT_PCM *timeOut,                  /*!< pointer to output time signal */
    176          HANDLE_SBR_DEC hSbrDecRight,       /*!< handle to Decoder channel right */
    177          INT_PCM *timeOutRight,             /*!< pointer to output time signal */
    178          const int strideIn,                /*!< Time data traversal strideIn */
    179          const int strideOut,               /*!< Time data traversal strideOut */
    180          HANDLE_SBR_HEADER_DATA hHeaderData,/*!< Static control data */
    181          HANDLE_SBR_FRAME_DATA hFrameData,  /*!< Control data of current frame */
    182          HANDLE_SBR_PREV_FRAME_DATA hPrevFrameData,  /*!< Some control data of last frame */
    183          const int applyProcessing,         /*!< Flag for SBR operation */
    184          HANDLE_PS_DEC h_ps_d,
    185          const UINT flags
    186         );
    187 
    188 
    189 
    190 SBR_ERROR
    191 createSbrDec (SBR_CHANNEL * hSbrChannel,
    192               HANDLE_SBR_HEADER_DATA hHeaderData,
    193               TRANSPOSER_SETTINGS *pSettings,
    194               const int downsampleFac,
    195               const UINT qmfFlags,
    196               const UINT flags,
    197               const int overlap,
    198               int chan);
    199 
    200 int
    201 deleteSbrDec (SBR_CHANNEL * hSbrChannel);
    202 
    203 SBR_ERROR
    204 resetSbrDec (HANDLE_SBR_DEC hSbrDec,
    205              HANDLE_SBR_HEADER_DATA hHeaderData,
    206              HANDLE_SBR_PREV_FRAME_DATA hPrevFrameData,
    207              const int useLP,
    208              const int downsampleFac);
    209 
    210 #endif
    211