1 2 /* ----------------------------------------------------------------------------------------------------------- 3 Software License for The Fraunhofer FDK AAC Codec Library for Android 4 5 Copyright 1995 - 2015 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 main definitions 87 */ 88 #ifndef __SBR_DEF_H 89 #define __SBR_DEF_H 90 91 #include "common_fix.h" 92 93 #define noError 0 94 #define HANDLE_ERROR_INFO INT 95 #define ERROR(a,b) 1 96 #define handBack 97 98 /* #define SBR_ENV_STATISTICS_BITRATE */ 99 #undef SBR_ENV_STATISTICS_BITRATE 100 101 /* #define SBR_ENV_STATISTICS */ 102 #undef SBR_ENV_STATISTICS 103 104 /* #define SBR_PAYLOAD_MONITOR */ 105 #undef SBR_PAYLOAD_MONITOR 106 107 #define SWAP(a,b) tempr=a, a=b, b=tempr 108 #define TRUE 1 109 #define FALSE 0 110 111 112 /* Constants */ 113 #define EPS 1e-12 114 #define LOG2 0.69314718056f /* natural logarithm of 2 */ 115 #define ILOG2 1.442695041f /* 1/LOG2 */ 116 #define RELAXATION_FLOAT (1e-6f) 117 #define RELAXATION (FL2FXCONST_DBL(RELAXATION_FLOAT)) 118 #define RELAXATION_FRACT (FL2FXCONST_DBL(0.524288f)) /* 0.524288f is fractional part of RELAXATION */ 119 #define RELAXATION_SHIFT (19) 120 #define RELAXATION_LD64 (FL2FXCONST_DBL(0.31143075889f))/* (ld64(RELAXATION) */ 121 122 /************ Definitions ***************/ 123 #define SBR_COMP_MODE_DELTA 0 124 #define SBR_COMP_MODE_CTS 1 125 #define SBR_MAX_ENERGY_VALUES 5 126 #define SBR_GLOBAL_TONALITY_VALUES 2 127 128 #define MAX_NUM_CHANNELS 2 129 130 #define MAX_NOISE_ENVELOPES 2 131 #define MAX_NUM_NOISE_COEFFS 5 132 #define MAX_NUM_NOISE_VALUES (MAX_NUM_NOISE_COEFFS*MAX_NOISE_ENVELOPES) 133 134 #define MAX_NUM_ENVELOPE_VALUES (MAX_ENVELOPES * MAX_FREQ_COEFFS) 135 #define MAX_ENVELOPES 5 136 #define MAX_FREQ_COEFFS 48 137 138 #define MAX_FREQ_COEFFS_FS44100 35 139 #define MAX_FREQ_COEFFS_FS48000 32 140 141 142 #define QMF_CHANNELS 64 143 #define QMF_FILTER_LENGTH 640 144 #define QMF_MAX_TIME_SLOTS 32 145 #define NO_OF_ESTIMATES_LC 4 146 #define NO_OF_ESTIMATES_LD 3 147 #define MAX_NO_OF_ESTIMATES 4 148 149 150 #define NOISE_FLOOR_OFFSET 6 151 #define NOISE_FLOOR_OFFSET_64 (FL2FXCONST_DBL(0.09375f)) 152 153 #define LOW_RES 0 154 #define HIGH_RES 1 155 156 #define LO 0 157 #define HI 1 158 159 #define LENGTH_SBR_FRAME_INFO 35 /* 19 */ 160 161 #define SBR_NSFB_LOW_RES 9 /* 8 */ 162 #define SBR_NSFB_HIGH_RES 18 /* 16 */ 163 164 165 #define SBR_XPOS_CTRL_DEFAULT 2 166 167 #define SBR_FREQ_SCALE_DEFAULT 2 168 #define SBR_ALTER_SCALE_DEFAULT 1 169 #define SBR_NOISE_BANDS_DEFAULT 2 170 171 #define SBR_LIMITER_BANDS_DEFAULT 2 172 #define SBR_LIMITER_GAINS_DEFAULT 2 173 #define SBR_LIMITER_GAINS_INFINITE 3 174 #define SBR_INTERPOL_FREQ_DEFAULT 1 175 #define SBR_SMOOTHING_LENGTH_DEFAULT 0 176 177 178 /* sbr_header */ 179 #define SI_SBR_AMP_RES_BITS 1 180 #define SI_SBR_COUPLING_BITS 1 181 #define SI_SBR_START_FREQ_BITS 4 182 #define SI_SBR_STOP_FREQ_BITS 4 183 #define SI_SBR_XOVER_BAND_BITS 3 184 #define SI_SBR_RESERVED_BITS 2 185 #define SI_SBR_DATA_EXTRA_BITS 1 186 #define SI_SBR_HEADER_EXTRA_1_BITS 1 187 #define SI_SBR_HEADER_EXTRA_2_BITS 1 188 189 /* sbr_header extra 1 */ 190 #define SI_SBR_FREQ_SCALE_BITS 2 191 #define SI_SBR_ALTER_SCALE_BITS 1 192 #define SI_SBR_NOISE_BANDS_BITS 2 193 194 /* sbr_header extra 2 */ 195 #define SI_SBR_LIMITER_BANDS_BITS 2 196 #define SI_SBR_LIMITER_GAINS_BITS 2 197 #define SI_SBR_INTERPOL_FREQ_BITS 1 198 #define SI_SBR_SMOOTHING_LENGTH_BITS 1 199 200 /* sbr_grid */ 201 #define SBR_CLA_BITS 2 /*!< size of bs_frame_class */ 202 #define SBR_CLA_BITS_LD 1 /*!< size of bs_frame_class */ 203 #define SBR_ENV_BITS 2 /*!< size of bs_num_env_raw */ 204 #define SBR_ABS_BITS 2 /*!< size of bs_abs_bord_raw for HE-AAC */ 205 #define SBR_NUM_BITS 2 /*!< size of bs_num_rel */ 206 #define SBR_REL_BITS 2 /*!< size of bs_rel_bord_raw */ 207 #define SBR_RES_BITS 1 /*!< size of bs_freq_res_flag */ 208 #define SBR_DIR_BITS 1 /*!< size of bs_df_flag */ 209 210 211 /* sbr_data */ 212 #define SI_SBR_INVF_MODE_BITS 2 213 214 215 #define SI_SBR_START_ENV_BITS_AMP_RES_3_0 6 216 #define SI_SBR_START_ENV_BITS_BALANCE_AMP_RES_3_0 5 217 #define SI_SBR_START_NOISE_BITS_AMP_RES_3_0 5 218 #define SI_SBR_START_NOISE_BITS_BALANCE_AMP_RES_3_0 5 219 220 #define SI_SBR_START_ENV_BITS_AMP_RES_1_5 7 221 #define SI_SBR_START_ENV_BITS_BALANCE_AMP_RES_1_5 6 222 223 224 #define SI_SBR_EXTENDED_DATA_BITS 1 225 #define SI_SBR_EXTENSION_SIZE_BITS 4 226 #define SI_SBR_EXTENSION_ESC_COUNT_BITS 8 227 #define SI_SBR_EXTENSION_ID_BITS 2 228 229 #define SBR_EXTENDED_DATA_MAX_CNT (15+255) 230 231 #define EXTENSION_ID_PS_CODING 2 232 233 /* Envelope coding constants */ 234 #define FREQ 0 235 #define TIME 1 236 237 /* qmf data scaling */ 238 #define QMF_SCALE_OFFSET 7 239 240 /* huffman tables */ 241 #define CODE_BOOK_SCF_LAV00 60 242 #define CODE_BOOK_SCF_LAV01 31 243 #define CODE_BOOK_SCF_LAV10 60 244 #define CODE_BOOK_SCF_LAV11 31 245 #define CODE_BOOK_SCF_LAV_BALANCE11 12 246 #define CODE_BOOK_SCF_LAV_BALANCE10 24 247 248 typedef enum 249 { 250 SBR_AMP_RES_1_5=0, 251 SBR_AMP_RES_3_0 252 } 253 AMP_RES; 254 255 typedef enum 256 { 257 XPOS_MDCT, 258 XPOS_MDCT_CROSS, 259 XPOS_LC, 260 XPOS_RESERVED, 261 XPOS_SWITCHED /* not a real choice but used here to control behaviour */ 262 } 263 XPOS_MODE; 264 265 typedef enum 266 { 267 INVF_OFF = 0, 268 INVF_LOW_LEVEL, 269 INVF_MID_LEVEL, 270 INVF_HIGH_LEVEL, 271 INVF_SWITCHED /* not a real choice but used here to control behaviour */ 272 } 273 INVF_MODE; 274 275 #endif 276
