1 /* ----------------------------------------------------------------------------- 2 Software License for The Fraunhofer FDK AAC Codec Library for Android 3 4 Copyright 1995 - 2018 Fraunhofer-Gesellschaft zur Frderung 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 (at) iis.fraunhofer.de 93 ----------------------------------------------------------------------------- */ 94 95 /**************************** SBR encoder library ****************************** 96 97 Author(s): 98 99 Description: 100 101 *******************************************************************************/ 102 103 /*! 104 \file 105 \brief SBR main definitions $Revision: 92790 $ 106 */ 107 #ifndef SBR_DEF_H 108 #define SBR_DEF_H 109 110 #include "common_fix.h" 111 112 #define noError 0 113 #define HANDLE_ERROR_INFO INT 114 #define ERROR(a, b) 1 115 116 /* #define SBR_ENV_STATISTICS_BITRATE */ 117 #undef SBR_ENV_STATISTICS_BITRATE 118 119 /* #define SBR_ENV_STATISTICS */ 120 #undef SBR_ENV_STATISTICS 121 122 /* #define SBR_PAYLOAD_MONITOR */ 123 #undef SBR_PAYLOAD_MONITOR 124 125 #define SWAP(a, b) tempr = a, a = b, b = tempr 126 #define TRUE 1 127 #define FALSE 0 128 129 /* Constants */ 130 #define EPS 1e-12 131 #define LOG2 0.69314718056f /* natural logarithm of 2 */ 132 #define ILOG2 1.442695041f /* 1/LOG2 */ 133 #define RELAXATION_FLOAT (1e-6f) 134 #define RELAXATION (FL2FXCONST_DBL(RELAXATION_FLOAT)) 135 #define RELAXATION_FRACT \ 136 (FL2FXCONST_DBL(0.524288f)) /* 0.524288f is fractional part of RELAXATION */ 137 #define RELAXATION_SHIFT (19) 138 #define RELAXATION_LD64 \ 139 (FL2FXCONST_DBL(0.31143075889f)) /* (ld64(RELAXATION) \ 140 */ 141 142 /************ Definitions ***************/ 143 #define SBR_COMP_MODE_DELTA 0 144 #define SBR_COMP_MODE_CTS 1 145 #define SBR_MAX_ENERGY_VALUES 5 146 #define SBR_GLOBAL_TONALITY_VALUES 2 147 148 #define MAX_NUM_CHANNELS 2 149 150 #define MAX_NOISE_ENVELOPES 2 151 #define MAX_NUM_NOISE_COEFFS 5 152 #define MAX_NUM_NOISE_VALUES (MAX_NUM_NOISE_COEFFS * MAX_NOISE_ENVELOPES) 153 154 #define MAX_NUM_ENVELOPE_VALUES (MAX_ENVELOPES * MAX_FREQ_COEFFS) 155 #define MAX_ENVELOPES 5 156 #define MAX_FREQ_COEFFS 48 157 158 #define MAX_FREQ_COEFFS_FS44100 35 159 #define MAX_FREQ_COEFFS_FS48000 32 160 161 #define NO_OF_ESTIMATES_LC 4 162 #define NO_OF_ESTIMATES_LD 3 163 #define MAX_NO_OF_ESTIMATES 4 164 165 #define NOISE_FLOOR_OFFSET 6 166 #define NOISE_FLOOR_OFFSET_64 (FL2FXCONST_DBL(0.09375f)) 167 168 #define LOW_RES 0 169 #define HIGH_RES 1 170 171 #define LO 0 172 #define HI 1 173 174 #define LENGTH_SBR_FRAME_INFO 35 /* 19 */ 175 176 #define SBR_NSFB_LOW_RES 9 /* 8 */ 177 #define SBR_NSFB_HIGH_RES 18 /* 16 */ 178 179 #define SBR_XPOS_CTRL_DEFAULT 2 180 181 #define SBR_FREQ_SCALE_DEFAULT 2 182 #define SBR_ALTER_SCALE_DEFAULT 1 183 #define SBR_NOISE_BANDS_DEFAULT 2 184 185 #define SBR_LIMITER_BANDS_DEFAULT 2 186 #define SBR_LIMITER_GAINS_DEFAULT 2 187 #define SBR_LIMITER_GAINS_INFINITE 3 188 #define SBR_INTERPOL_FREQ_DEFAULT 1 189 #define SBR_SMOOTHING_LENGTH_DEFAULT 0 190 191 /* sbr_header */ 192 #define SI_SBR_AMP_RES_BITS 1 193 #define SI_SBR_COUPLING_BITS 1 194 #define SI_SBR_START_FREQ_BITS 4 195 #define SI_SBR_STOP_FREQ_BITS 4 196 #define SI_SBR_XOVER_BAND_BITS 3 197 #define SI_SBR_RESERVED_BITS 2 198 #define SI_SBR_DATA_EXTRA_BITS 1 199 #define SI_SBR_HEADER_EXTRA_1_BITS 1 200 #define SI_SBR_HEADER_EXTRA_2_BITS 1 201 202 /* sbr_header extra 1 */ 203 #define SI_SBR_FREQ_SCALE_BITS 2 204 #define SI_SBR_ALTER_SCALE_BITS 1 205 #define SI_SBR_NOISE_BANDS_BITS 2 206 207 /* sbr_header extra 2 */ 208 #define SI_SBR_LIMITER_BANDS_BITS 2 209 #define SI_SBR_LIMITER_GAINS_BITS 2 210 #define SI_SBR_INTERPOL_FREQ_BITS 1 211 #define SI_SBR_SMOOTHING_LENGTH_BITS 1 212 213 /* sbr_grid */ 214 #define SBR_CLA_BITS 2 /*!< size of bs_frame_class */ 215 #define SBR_CLA_BITS_LD 1 /*!< size of bs_frame_class */ 216 #define SBR_ENV_BITS 2 /*!< size of bs_num_env_raw */ 217 #define SBR_ABS_BITS 2 /*!< size of bs_abs_bord_raw for HE-AAC */ 218 #define SBR_NUM_BITS 2 /*!< size of bs_num_rel */ 219 #define SBR_REL_BITS 2 /*!< size of bs_rel_bord_raw */ 220 #define SBR_RES_BITS 1 /*!< size of bs_freq_res_flag */ 221 #define SBR_DIR_BITS 1 /*!< size of bs_df_flag */ 222 223 /* sbr_data */ 224 #define SI_SBR_INVF_MODE_BITS 2 225 226 #define SI_SBR_START_ENV_BITS_AMP_RES_3_0 6 227 #define SI_SBR_START_ENV_BITS_BALANCE_AMP_RES_3_0 5 228 #define SI_SBR_START_NOISE_BITS_AMP_RES_3_0 5 229 #define SI_SBR_START_NOISE_BITS_BALANCE_AMP_RES_3_0 5 230 231 #define SI_SBR_START_ENV_BITS_AMP_RES_1_5 7 232 #define SI_SBR_START_ENV_BITS_BALANCE_AMP_RES_1_5 6 233 234 #define SI_SBR_EXTENDED_DATA_BITS 1 235 #define SI_SBR_EXTENSION_SIZE_BITS 4 236 #define SI_SBR_EXTENSION_ESC_COUNT_BITS 8 237 #define SI_SBR_EXTENSION_ID_BITS 2 238 239 #define SBR_EXTENDED_DATA_MAX_CNT (15 + 255) 240 241 #define EXTENSION_ID_PS_CODING 2 242 243 /* Envelope coding constants */ 244 #define FREQ 0 245 #define TIME 1 246 247 /* qmf data scaling */ 248 #define QMF_SCALE_OFFSET 7 249 250 /* huffman tables */ 251 #define CODE_BOOK_SCF_LAV00 60 252 #define CODE_BOOK_SCF_LAV01 31 253 #define CODE_BOOK_SCF_LAV10 60 254 #define CODE_BOOK_SCF_LAV11 31 255 #define CODE_BOOK_SCF_LAV_BALANCE11 12 256 #define CODE_BOOK_SCF_LAV_BALANCE10 24 257 258 typedef enum { SBR_AMP_RES_1_5 = 0, SBR_AMP_RES_3_0 } AMP_RES; 259 260 typedef enum { 261 XPOS_MDCT, 262 XPOS_MDCT_CROSS, 263 XPOS_LC, 264 XPOS_RESERVED, 265 XPOS_SWITCHED /* not a real choice but used here to control behaviour */ 266 } XPOS_MODE; 267 268 typedef enum { 269 INVF_OFF = 0, 270 INVF_LOW_LEVEL, 271 INVF_MID_LEVEL, 272 INVF_HIGH_LEVEL, 273 INVF_SWITCHED /* not a real choice but used here to control behaviour */ 274 } INVF_MODE; 275 276 #endif 277
