1 /* ----------------------------------------------------------------------------- 2 Software License for The Fraunhofer FDK AAC Codec Library for Android 3 4 © Copyright 1995 - 2019 Fraunhofer-Gesellschaft zur Förderung der angewandten 5 Forschung e.V. All rights reserved. 6 7 1. INTRODUCTION 8 The Fraunhofer FDK AAC Codec Library for Android ("FDK AAC Codec") is software 9 that implements the MPEG Advanced Audio Coding ("AAC") encoding and decoding 10 scheme for digital audio. This FDK AAC Codec software is intended to be used on 11 a wide variety of Android devices. 12 13 AAC's HE-AAC and HE-AAC v2 versions are regarded as today's most efficient 14 general perceptual audio codecs. AAC-ELD is considered the best-performing 15 full-bandwidth communications codec by independent studies and is widely 16 deployed. AAC has been standardized by ISO and IEC as part of the MPEG 17 specifications. 18 19 Patent licenses for necessary patent claims for the FDK AAC Codec (including 20 those of Fraunhofer) may be obtained through Via Licensing 21 (www.vialicensing.com) or through the respective patent owners individually for 22 the purpose of encoding or decoding bit streams in products that are compliant 23 with the ISO/IEC MPEG audio standards. Please note that most manufacturers of 24 Android devices already license these patent claims through Via Licensing or 25 directly from the patent owners, and therefore FDK AAC Codec software may 26 already be covered under those patent licenses when it is used for those 27 licensed purposes only. 28 29 Commercially-licensed AAC software libraries, including floating-point versions 30 with enhanced sound quality, are also available from Fraunhofer. Users are 31 encouraged to check the Fraunhofer website for additional applications 32 information and documentation. 33 34 2. COPYRIGHT LICENSE 35 36 Redistribution and use in source and binary forms, with or without modification, 37 are permitted without payment of copyright license fees provided that you 38 satisfy the following conditions: 39 40 You must retain the complete text of this software license in redistributions of 41 the FDK AAC Codec or your modifications thereto in source code form. 42 43 You must retain the complete text of this software license in the documentation 44 and/or other materials provided with redistributions of the FDK AAC Codec or 45 your modifications thereto in binary form. You must make available free of 46 charge copies of the complete source code of the FDK AAC Codec and your 47 modifications thereto to recipients of copies in binary form. 48 49 The name of Fraunhofer may not be used to endorse or promote products derived 50 from this library without prior written permission. 51 52 You may not charge copyright license fees for anyone to use, copy or distribute 53 the FDK AAC Codec software or your modifications thereto. 54 55 Your modified versions of the FDK AAC Codec must carry prominent notices stating 56 that you changed the software and the date of any change. For modified versions 57 of the FDK AAC Codec, the term "Fraunhofer FDK AAC Codec Library for Android" 58 must be replaced by the term "Third-Party Modified Version of the Fraunhofer FDK 59 AAC Codec Library for Android." 60 61 3. NO PATENT LICENSE 62 63 NO EXPRESS OR IMPLIED LICENSES TO ANY PATENT CLAIMS, including without 64 limitation the patents of Fraunhofer, ARE GRANTED BY THIS SOFTWARE LICENSE. 65 Fraunhofer provides no warranty of patent non-infringement with respect to this 66 software. 67 68 You may use this FDK AAC Codec software or modifications thereto only for 69 purposes that are authorized by appropriate patent licenses. 70 71 4. DISCLAIMER 72 73 This FDK AAC Codec software is provided by Fraunhofer on behalf of the copyright 74 holders and contributors "AS IS" and WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, 75 including but not limited to the implied warranties of merchantability and 76 fitness for a particular purpose. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR 77 CONTRIBUTORS BE LIABLE for any direct, indirect, incidental, special, exemplary, 78 or consequential damages, including but not limited to procurement of substitute 79 goods or services; loss of use, data, or profits, or business interruption, 80 however caused and on any theory of liability, whether in contract, strict 81 liability, or tort (including negligence), arising in any way out of the use of 82 this software, even if advised of the possibility of such damage. 83 84 5. CONTACT INFORMATION 85 86 Fraunhofer Institute for Integrated Circuits IIS 87 Attention: Audio and Multimedia Departments - FDK AAC LL 88 Am Wolfsmantel 33 89 91058 Erlangen, Germany 90 91 www.iis.fraunhofer.de/amm 92 amm-info@iis.fraunhofer.de 93 ----------------------------------------------------------------------------- */ 94 95 /**************************** AAC decoder library ****************************** 96 97 Author(s): Josef Hoepfl 98 99 Description: Definition of constant tables 100 101 *******************************************************************************/ 102 103 #ifndef AAC_ROM_H 104 #define AAC_ROM_H 105 106 #include "common_fix.h" 107 #include "FDK_audio.h" 108 #include "aacdec_hcr_types.h" 109 #include "aacdec_hcrs.h" 110 111 #define PCM_AAC LONG 112 #define PCM_DEC FIXP_DBL 113 #define MAXVAL_PCM_DEC MAXVAL_DBL 114 #define MINVAL_PCM_DEC MINVAL_DBL 115 #define FIXP_DBL2PCM_DEC(x) (x) 116 #define PCM_DEC2FIXP_DBL(x) (x) 117 #define PCM_DEC_BITS DFRACT_BITS 118 #define PCM_DEC2FX_PCM(x) FX_DBL2FX_PCM(x) 119 #define FX_PCM2PCM_DEC(x) FX_PCM2FX_DBL(x) 120 121 #define AACDEC_MAX_CH_CONF 14 122 #define AACDEC_CH_ELEMENTS_TAB_SIZE 7 /*!< Size of element tables */ 123 124 #define AAC_NF_NO_RANDOM_VAL \ 125 512 /*!< Size of random number array for noise floor */ 126 127 #define INV_QUANT_TABLESIZE 256 128 129 extern const FIXP_DBL InverseQuantTable[INV_QUANT_TABLESIZE + 1]; 130 extern const FIXP_DBL MantissaTable[4][14]; 131 extern const SCHAR ExponentTable[4][14]; 132 133 #define NUM_LD_COEF_512 1536 134 #define NUM_LD_COEF_480 1440 135 /* Window table partition exponents. */ 136 #define WTS0 (1) 137 #define WTS1 (0) 138 #define WTS2 (-2) 139 extern const FIXP_WTB LowDelaySynthesis512[1536]; 140 extern const FIXP_WTB LowDelaySynthesis480[1440]; 141 extern const FIXP_WTB LowDelaySynthesis256[768]; 142 extern const FIXP_WTB LowDelaySynthesis240[720]; 143 extern const FIXP_WTB LowDelaySynthesis160[480]; 144 extern const FIXP_WTB LowDelaySynthesis128[384]; 145 extern const FIXP_WTB LowDelaySynthesis120[360]; 146 147 typedef struct { 148 const SHORT *sfbOffsetLong; 149 const SHORT *sfbOffsetShort; 150 UCHAR numberOfSfbLong; 151 UCHAR numberOfSfbShort; 152 } SFB_INFO; 153 154 extern const SFB_INFO sfbOffsetTables[5][16]; 155 156 /* Huffman tables */ 157 enum { HuffmanBits = 2, HuffmanEntries = (1 << HuffmanBits) }; 158 159 typedef struct { 160 const USHORT (*CodeBook)[HuffmanEntries]; 161 UCHAR Dimension; 162 UCHAR numBits; 163 UCHAR Offset; 164 } CodeBookDescription; 165 166 extern const CodeBookDescription AACcodeBookDescriptionTable[13]; 167 extern const CodeBookDescription AACcodeBookDescriptionSCL; 168 169 extern const STATEFUNC aStateConstant2State[]; 170 171 extern const SCHAR aCodebook2StartInt[]; 172 173 extern const UCHAR aMinOfCbPair[]; 174 extern const UCHAR aMaxOfCbPair[]; 175 176 extern const UCHAR aMaxCwLen[]; 177 extern const UCHAR aDimCb[]; 178 extern const UCHAR aDimCbShift[]; 179 extern const UCHAR aSignCb[]; 180 extern const UCHAR aCbPriority[]; 181 182 extern const UINT *aHuffTable[]; 183 extern const SCHAR *aQuantTable[]; 184 185 extern const USHORT aLargestAbsoluteValue[]; 186 187 extern const UINT aHuffTreeRvlcEscape[]; 188 extern const UINT aHuffTreeRvlCodewds[]; 189 190 extern const UCHAR tns_max_bands_tbl[13][2]; 191 192 extern const UCHAR tns_max_bands_tbl_480[13]; 193 extern const UCHAR tns_max_bands_tbl_512[13]; 194 195 #define FIXP_TCC FIXP_DBL 196 197 extern const FIXP_TCC FDKaacDec_tnsCoeff3[8]; 198 extern const FIXP_TCC FDKaacDec_tnsCoeff4[16]; 199 200 extern const UCHAR FDKaacDec_tnsCoeff3_gain_ld[]; 201 extern const UCHAR FDKaacDec_tnsCoeff4_gain_ld[]; 202 203 extern const USHORT AacDec_randomSign[AAC_NF_NO_RANDOM_VAL / 16]; 204 205 extern const FIXP_DBL pow2_div24minus1[47]; 206 extern const int offsetTab[2][16]; 207 208 /* Channel mapping indices for time domain I/O. 209 The first dimension is the channel configuration index. */ 210 extern const UCHAR channelMappingTablePassthrough[15][8]; 211 extern const UCHAR channelMappingTableWAV[15][8]; 212 213 /* Lookup tables for elements in ER bitstream */ 214 extern const MP4_ELEMENT_ID elementsTab[AACDEC_MAX_CH_CONF] 215 [AACDEC_CH_ELEMENTS_TAB_SIZE]; 216 217 #define SF_FNA_COEFFS \ 218 1 /* Compile-time prescaler for MDST-filter coefficients. */ 219 /* SF_FNA_COEFFS > 0 should only be considered for FIXP_DBL-coefficients */ 220 /* (i.e. if CPLX_PRED_FILTER_16BIT is not defined). */ 221 /* With FIXP_DBL loss of precision is possible for SF_FNA_COEFFS > 11. */ 222 223 #ifdef CPLX_PRED_FILTER_16BIT 224 #define FIXP_FILT FIXP_SGL 225 #define FILT(a) ((FL2FXCONST_SGL(a)) >> SF_FNA_COEFFS) 226 #else 227 #define FIXP_FILT FIXP_DBL 228 #define FILT(a) ((FL2FXCONST_DBL(a)) >> SF_FNA_COEFFS) 229 #endif 230 231 extern const FIXP_FILT mdst_filt_coef_curr[20][3]; /* MDST-filter coefficient 232 tables used for current 233 window */ 234 extern const FIXP_FILT mdst_filt_coef_prev[6][4]; /* MDST-filter coefficient 235 tables used for previous 236 window */ 237 238 #endif /* #ifndef AAC_ROM_H */ 239