libAACdec/src/aac_rom.h

   1
   2 /* -----------------------------------------------------------------------------------------------------------
   3 Software License for The Fraunhofer FDK AAC Codec Library for Android
   4
   5 © Copyright  1995 - 2013 Fraunhofer-Gesellschaft zur Förderung 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@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[13];
 168 extern const UCHAR tns_max_bands_tbl_512[13];
 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 */