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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 /*****************************  MPEG-4 AAC Decoder  **************************
     85 
     86    Author(s):   Josef Hoepfl
     87    Description: Definition of constant tables
     88 
     89 ******************************************************************************/
     90 
     91 #ifndef AAC_ROM_H
     92 #define AAC_ROM_H
     93 
     94 #include "common_fix.h"
     95 #include "FDK_audio.h"
     96 #include "aacdec_hcr_types.h"
     97 #include "aacdec_hcrs.h"
     98 
     99 #define AAC_NF_NO_RANDOM_VAL  512   /*!< Size of random number array for noise floor */
    100 
    101 #define INV_QUANT_TABLESIZE 256
    102 
    103 extern const FIXP_DBL InverseQuantTable [INV_QUANT_TABLESIZE + 1] ;
    104 extern const FIXP_DBL MantissaTable [4][14] ;
    105 extern const SCHAR ExponentTable [4][14] ;
    106 
    107 #define NUM_LD_COEF_512 1536
    108 #define NUM_LD_COEF_480 1440
    109 /* Window table partition exponents. */
    110 #define WTS0 (1)
    111 #define WTS1 (0)
    112 #define WTS2 (-2)
    113 extern const FIXP_WTB LowDelaySynthesis512[1536];
    114 extern const FIXP_WTB LowDelaySynthesis480[1440];
    115 
    116 typedef struct {
    117   const SHORT *sfbOffsetLong;
    118   const SHORT *sfbOffsetShort;
    119   UCHAR numberOfSfbLong;
    120   UCHAR numberOfSfbShort;
    121 } SFB_INFO;
    122 
    123 extern const SFB_INFO sfbOffsetTables[5][16];
    124 
    125 /* Huffman tables */
    126 enum {
    127   HuffmanBits = 2,
    128   HuffmanEntries = (1 << HuffmanBits)
    129 };
    130 
    131 typedef struct
    132 {
    133   const USHORT (*CodeBook)[HuffmanEntries];
    134   UCHAR Dimension;
    135   UCHAR numBits;
    136   UCHAR Offset;
    137 } CodeBookDescription;
    138 
    139 extern const CodeBookDescription AACcodeBookDescriptionTable[13];
    140 extern const CodeBookDescription AACcodeBookDescriptionSCL;
    141 
    142 
    143 extern const STATEFUNC  aStateConstant2State[];
    144 
    145 extern const SCHAR      aCodebook2StartInt[];
    146 
    147 extern const UCHAR      aMinOfCbPair[];
    148 extern const UCHAR      aMaxOfCbPair[];
    149 
    150 extern const UCHAR      aMaxCwLen[];
    151 extern const UCHAR      aDimCb[];
    152 extern const UCHAR      aDimCbShift[];
    153 extern const UCHAR      aSignCb[];
    154 extern const UCHAR      aCbPriority[];
    155 
    156 extern const UINT      *aHuffTable[];
    157 extern const SCHAR     *aQuantTable[];
    158 
    159 extern const USHORT     aLargestAbsoluteValue[];
    160 
    161 extern const UINT   aHuffTreeRvlcEscape[];
    162 extern const UINT   aHuffTreeRvlCodewds[];
    163 
    164 
    165 extern const UCHAR tns_max_bands_tbl[13][2];
    166 
    167 extern const UCHAR tns_max_bands_tbl_480[5];
    168 extern const UCHAR tns_max_bands_tbl_512[5];
    169 
    170 #define FIXP_TCC FIXP_DBL
    171 
    172 extern const FIXP_TCC FDKaacDec_tnsCoeff3[8];
    173 extern const FIXP_TCC FDKaacDec_tnsCoeff4[16];
    174 
    175 extern const USHORT randomSign[AAC_NF_NO_RANDOM_VAL/16];
    176 
    177 extern const FIXP_DBL pow2_div24minus1[47];
    178 extern const int offsetTab[2][16];
    179 
    180 /* Channel mapping indices for time domain I/O. First dimension is channel count-1. */
    181 extern const UCHAR channelMappingTablePassthrough[8][8];
    182 extern const UCHAR channelMappingTableWAV[8][8];
    183 
    184 /* Lookup tables for elements in ER bitstream */
    185 extern const MP4_ELEMENT_ID elementsTab[8][7];
    186 
    187 #endif /* #ifndef AAC_ROM_H */
    188