1 2/* ----------------------------------------------------------------------------------------------------------- 3Software License for The Fraunhofer FDK AAC Codec Library for Android 4 5� Copyright 1995 - 2013 Fraunhofer-Gesellschaft zur F�rderung der angewandten Forschung e.V. 6 All rights reserved. 7 8 1. INTRODUCTION 9The Fraunhofer FDK AAC Codec Library for Android ("FDK AAC Codec") is software that implements 10the MPEG Advanced Audio Coding ("AAC") encoding and decoding scheme for digital audio. 11This FDK AAC Codec software is intended to be used on a wide variety of Android devices. 12 13AAC's HE-AAC and HE-AAC v2 versions are regarded as today's most efficient general perceptual 14audio codecs. AAC-ELD is considered the best-performing full-bandwidth communications codec by 15independent studies and is widely deployed. AAC has been standardized by ISO and IEC as part 16of the MPEG specifications. 17 18Patent licenses for necessary patent claims for the FDK AAC Codec (including those of Fraunhofer) 19may be obtained through Via Licensing (www.vialicensing.com) or through the respective patent owners 20individually for the purpose of encoding or decoding bit streams in products that are compliant with 21the ISO/IEC MPEG audio standards. Please note that most manufacturers of Android devices already license 22these patent claims through Via Licensing or directly from the patent owners, and therefore FDK AAC Codec 23software may already be covered under those patent licenses when it is used for those licensed purposes only. 24 25Commercially-licensed AAC software libraries, including floating-point versions with enhanced sound quality, 26are also available from Fraunhofer. Users are encouraged to check the Fraunhofer website for additional 27applications information and documentation. 28 292. COPYRIGHT LICENSE 30 31Redistribution and use in source and binary forms, with or without modification, are permitted without 32payment of copyright license fees provided that you satisfy the following conditions: 33 34You must retain the complete text of this software license in redistributions of the FDK AAC Codec or 35your modifications thereto in source code form. 36 37You must retain the complete text of this software license in the documentation and/or other materials 38provided with redistributions of the FDK AAC Codec or your modifications thereto in binary form. 39You must make available free of charge copies of the complete source code of the FDK AAC Codec and your 40modifications thereto to recipients of copies in binary form. 41 42The name of Fraunhofer may not be used to endorse or promote products derived from this library without 43prior written permission. 44 45You may not charge copyright license fees for anyone to use, copy or distribute the FDK AAC Codec 46software or your modifications thereto. 47 48Your modified versions of the FDK AAC Codec must carry prominent notices stating that you changed the software 49and 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." 52 533. NO PATENT LICENSE 54 55NO EXPRESS OR IMPLIED LICENSES TO ANY PATENT CLAIMS, including without limitation the patents of Fraunhofer, 56ARE GRANTED BY THIS SOFTWARE LICENSE. Fraunhofer provides no warranty of patent non-infringement with 57respect to this software. 58 59You may use this FDK AAC Codec software or modifications thereto only for purposes that are authorized 60by appropriate patent licenses. 61 624. DISCLAIMER 63 64This 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 66of merchantability and fitness for a particular purpose. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR 67CONTRIBUTORS BE LIABLE for any direct, indirect, incidental, special, exemplary, or consequential damages, 68including but not limited to procurement of substitute goods or services; loss of use, data, or profits, 69or business interruption, however caused and on any theory of liability, whether in contract, strict 70liability, or tort (including negligence), arising in any way out of the use of this software, even if 71advised of the possibility of such damage. 72 735. CONTACT INFORMATION 74 75Fraunhofer Institute for Integrated Circuits IIS 76Attention: Audio and Multimedia Departments - FDK AAC LL 77Am Wolfsmantel 33 7891058 Erlangen, Germany 79 80www.iis.fraunhofer.de/amm 81amm-info@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 1 125 126#define MAX_NUM_CHANNELS 2 127 128#define MAX_NOISE_ENVELOPES 2 129#define MAX_NUM_NOISE_COEFFS 5 130#define MAX_NUM_NOISE_VALUES (MAX_NUM_NOISE_COEFFS*MAX_NOISE_ENVELOPES) 131 132#define MAX_NUM_ENVELOPE_VALUES (MAX_ENVELOPES * MAX_FREQ_COEFFS) 133#define MAX_ENVELOPES 5 134#define MAX_FREQ_COEFFS 48 135 136#define MAX_FREQ_COEFFS_FS44100 35 137#define MAX_FREQ_COEFFS_FS48000 32 138 139 140#define QMF_CHANNELS 64 141#define QMF_FILTER_LENGTH 640 142#define QMF_MAX_TIME_SLOTS 32 143#define NO_OF_ESTIMATES_LC 4 144#define NO_OF_ESTIMATES_LD 3 145#define MAX_NO_OF_ESTIMATES 4 146 147 148#define NOISE_FLOOR_OFFSET 6 149#define NOISE_FLOOR_OFFSET_64 (FL2FXCONST_DBL(0.09375f)) 150 151#define LOW_RES 0 152#define HIGH_RES 1 153 154#define LO 0 155#define HI 1 156 157#define LENGTH_SBR_FRAME_INFO 35 /* 19 */ 158 159#define SBR_NSFB_LOW_RES 9 /* 8 */ 160#define SBR_NSFB_HIGH_RES 18 /* 16 */ 161 162 163#define SBR_XPOS_CTRL_DEFAULT 2 164 165#define SBR_FREQ_SCALE_DEFAULT 2 166#define SBR_ALTER_SCALE_DEFAULT 1 167#define SBR_NOISE_BANDS_DEFAULT 2 168 169#define SBR_LIMITER_BANDS_DEFAULT 2 170#define SBR_LIMITER_GAINS_DEFAULT 2 171#define SBR_LIMITER_GAINS_INFINITE 3 172#define SBR_INTERPOL_FREQ_DEFAULT 1 173#define SBR_SMOOTHING_LENGTH_DEFAULT 0 174 175 176/* sbr_header */ 177#define SI_SBR_AMP_RES_BITS 1 178#define SI_SBR_COUPLING_BITS 1 179#define SI_SBR_START_FREQ_BITS 4 180#define SI_SBR_STOP_FREQ_BITS 4 181#define SI_SBR_XOVER_BAND_BITS 3 182#define SI_SBR_RESERVED_BITS 2 183#define SI_SBR_DATA_EXTRA_BITS 1 184#define SI_SBR_HEADER_EXTRA_1_BITS 1 185#define SI_SBR_HEADER_EXTRA_2_BITS 1 186 187/* sbr_header extra 1 */ 188#define SI_SBR_FREQ_SCALE_BITS 2 189#define SI_SBR_ALTER_SCALE_BITS 1 190#define SI_SBR_NOISE_BANDS_BITS 2 191 192/* sbr_header extra 2 */ 193#define SI_SBR_LIMITER_BANDS_BITS 2 194#define SI_SBR_LIMITER_GAINS_BITS 2 195#define SI_SBR_INTERPOL_FREQ_BITS 1 196#define SI_SBR_SMOOTHING_LENGTH_BITS 1 197 198/* sbr_grid */ 199#define SBR_CLA_BITS 2 /*!< size of bs_frame_class */ 200#define SBR_CLA_BITS_LD 1 /*!< size of bs_frame_class */ 201#define SBR_ENV_BITS 2 /*!< size of bs_num_env_raw */ 202#define SBR_ABS_BITS 2 /*!< size of bs_abs_bord_raw for HE-AAC */ 203#define SBR_NUM_BITS 2 /*!< size of bs_num_rel */ 204#define SBR_REL_BITS 2 /*!< size of bs_rel_bord_raw */ 205#define SBR_RES_BITS 1 /*!< size of bs_freq_res_flag */ 206#define SBR_DIR_BITS 1 /*!< size of bs_df_flag */ 207 208 209/* sbr_data */ 210#define SI_SBR_INVF_MODE_BITS 2 211 212 213#define SI_SBR_START_ENV_BITS_AMP_RES_3_0 6 214#define SI_SBR_START_ENV_BITS_BALANCE_AMP_RES_3_0 5 215#define SI_SBR_START_NOISE_BITS_AMP_RES_3_0 5 216#define SI_SBR_START_NOISE_BITS_BALANCE_AMP_RES_3_0 5 217 218#define SI_SBR_START_ENV_BITS_AMP_RES_1_5 7 219#define SI_SBR_START_ENV_BITS_BALANCE_AMP_RES_1_5 6 220 221 222#define SI_SBR_EXTENDED_DATA_BITS 1 223#define SI_SBR_EXTENSION_SIZE_BITS 4 224#define SI_SBR_EXTENSION_ESC_COUNT_BITS 8 225#define SI_SBR_EXTENSION_ID_BITS 2 226 227#define SBR_EXTENDED_DATA_MAX_CNT (15+255) 228 229#define EXTENSION_ID_PS_CODING 2 230 231/* Envelope coding constants */ 232#define FREQ 0 233#define TIME 1 234 235 236/* huffman tables */ 237#define CODE_BOOK_SCF_LAV00 60 238#define CODE_BOOK_SCF_LAV01 31 239#define CODE_BOOK_SCF_LAV10 60 240#define CODE_BOOK_SCF_LAV11 31 241#define CODE_BOOK_SCF_LAV_BALANCE11 12 242#define CODE_BOOK_SCF_LAV_BALANCE10 24 243 244typedef enum 245{ 246 SBR_AMP_RES_1_5=0, 247 SBR_AMP_RES_3_0 248} 249AMP_RES; 250 251typedef enum 252{ 253 XPOS_MDCT, 254 XPOS_MDCT_CROSS, 255 XPOS_LC, 256 XPOS_RESERVED, 257 XPOS_SWITCHED /* not a real choice but used here to control behaviour */ 258} 259XPOS_MODE; 260 261typedef enum 262{ 263 INVF_OFF = 0, 264 INVF_LOW_LEVEL, 265 INVF_MID_LEVEL, 266 INVF_HIGH_LEVEL, 267 INVF_SWITCHED /* not a real choice but used here to control behaviour */ 268} 269INVF_MODE; 270 271typedef enum 272{ 273 FREQ_RES_LOW = 0, 274 FREQ_RES_HIGH 275} 276FREQ_RES; 277 278 279#endif 280