1 2 /* ----------------------------------------------------------------------------------------------------------- 3 Software License for The Fraunhofer FDK AAC Codec Library for Android 4 5 Copyright 1995 - 2013 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 /*************************** Fraunhofer IIS FDK Tools *********************** 85 86 Author(s): Oliver Moser 87 Description: ROM tables used by FDK tools 88 89 ******************************************************************************/ 90 91 #ifndef __FDK_TOOLS_ROM_H__ 92 #define __FDK_TOOLS_ROM_H__ 93 94 #include "common_fix.h" 95 #include "FDK_audio.h" 96 97 98 /* None radix2 rotation vectors */ 99 extern const FIXP_STB RotVectorReal60[60]; 100 extern const FIXP_STB RotVectorImag60[60]; 101 extern const FIXP_STB RotVectorReal240[240]; 102 extern const FIXP_STB RotVectorImag240[240]; 103 extern const FIXP_STB RotVectorReal480[480]; 104 extern const FIXP_STB RotVectorImag480[480]; 105 106 107 /* Regular sine tables */ 108 extern const FIXP_STP SineTable512[]; 109 extern const FIXP_STP SineTable480[]; 110 111 /* AAC-LC windows */ 112 extern const FIXP_WTP SineWindow1024[]; 113 extern const FIXP_WTP KBDWindow1024[]; 114 extern const FIXP_WTP SineWindow128[]; 115 extern const FIXP_WTP KBDWindow128[]; 116 117 extern const FIXP_WTP SineWindow960[]; 118 extern const FIXP_WTP KBDWindow960[]; 119 extern const FIXP_WTP SineWindow120[]; 120 extern const FIXP_WTP KBDWindow120[]; 121 122 /* AAC-LD windows */ 123 extern const FIXP_WTP SineWindow512[]; 124 #define LowOverlapWindow512 SineWindow128 125 extern const FIXP_WTP SineWindow480[]; 126 #define LowOverlapWindow480 SineWindow120 127 128 129 130 extern const FIXP_WTP SineWindow64[]; 131 extern const FIXP_WTP SineWindow32[]; 132 133 /** 134 * \brief Helper table for window slope mapping. You should prefer the usage of the 135 * function FDKgetWindowSlope(), this table is only made public for some optimized 136 * access inside dct.cpp. 137 */ 138 extern const FIXP_WTP *const windowSlopes[2][3][9]; 139 140 /** 141 * \brief Window slope access helper. Obtain a window of given length and shape. 142 * \param length Length of the window slope. 143 * \param shape Shape index of the window slope. 0: sine window, 1: Kaiser-Bessel. Any other 144 * value is applied a mask of 1 to, mapping it to either 0 or 1. 145 * \param Pointer to window slope or NULL if the requested window slope is not available. 146 */ 147 const FIXP_WTP * FDKgetWindowSlope(int length, int shape); 148 149 extern const FIXP_WTP sin_twiddle_L64[]; 150 151 /* 152 * Filter coefficient type definition 153 */ 154 155 #if defined(ARCH_PREFER_MULT_16x16) || defined(ARCH_PREFER_MULT_32x16) 156 #define QMF_COEFF_16BIT 157 #endif 158 159 #define QMF_FILTER_PROTOTYPE_SIZE 640 160 #define QMF_NO_POLY 5 161 162 #ifdef QMF_COEFF_16BIT 163 #define FIXP_PFT FIXP_SGL 164 #define FIXP_QTW FIXP_SGL 165 #else 166 #define FIXP_PFT FIXP_DBL 167 #define FIXP_QTW FIXP_DBL 168 #endif 169 170 #define QMF640_PFT_TABLE_SIZE (640/2 + QMF_NO_POLY) 171 172 extern const FIXP_QTW qmf_phaseshift_cos32[32]; 173 extern const FIXP_QTW qmf_phaseshift_sin32[32]; 174 /* Adapted analysis post-twiddles for down-sampled HQ SBR */ 175 extern const FIXP_QTW qmf_phaseshift_cos_downsamp32[32]; 176 extern const FIXP_QTW qmf_phaseshift_sin_downsamp32[32]; 177 extern const FIXP_QTW qmf_phaseshift_cos64[64]; 178 extern const FIXP_QTW qmf_phaseshift_sin64[64]; 179 180 extern const FIXP_PFT qmf_64[QMF640_PFT_TABLE_SIZE+QMF_NO_POLY]; 181 182 183 184 185 186 #define QMF640_CLDFB_PFT_TABLE_SIZE (640) 187 #define QMF320_CLDFB_PFT_TABLE_SIZE (320) 188 #define QMF_CLDFB_PFT_SCALE 1 189 190 extern const FIXP_QTW qmf_phaseshift_cos32_cldfb[32]; 191 extern const FIXP_QTW qmf_phaseshift_sin32_cldfb[32]; 192 extern const FIXP_QTW qmf_phaseshift_cos64_cldfb[64]; 193 extern const FIXP_QTW qmf_phaseshift_sin64_cldfb[64]; 194 195 extern const FIXP_PFT qmf_cldfb_640[QMF640_CLDFB_PFT_TABLE_SIZE]; 196 extern const FIXP_PFT qmf_cldfb_320[QMF320_CLDFB_PFT_TABLE_SIZE]; 197 198 199 200 201 202 /* 203 * Raw Data Block list stuff. 204 */ 205 typedef enum { 206 element_instance_tag, 207 common_window, 208 global_gain, 209 ics_info, /* ics_reserved_bit, window_sequence, window_shape, max_sfb, scale_factor_grouping, predictor_data_present, ltp_data_present, ltp_data */ 210 max_sfb, 211 ms, /* ms_mask_present, ms_used */ 212 /*predictor_data_present,*/ /* part of ics_info */ 213 ltp_data_present, 214 ltp_data, 215 section_data, 216 scale_factor_data, 217 pulse, /* pulse_data_present, pulse_data */ 218 tns_data_present, 219 tns_data, 220 gain_control_data_present, 221 gain_control_data, 222 esc1_hcr, 223 esc2_rvlc, 224 spectral_data, 225 226 scale_factor_data_usac, 227 core_mode, 228 common_tw, 229 lpd_channel_stream, 230 tw_data, 231 noise, 232 ac_spectral_data, 233 fac_data, 234 tns_active, /* introduced in MPEG-D usac CD */ 235 tns_data_present_usac, 236 common_max_sfb, 237 238 239 /* Non data list items */ 240 adtscrc_start_reg1, 241 adtscrc_start_reg2, 242 adtscrc_end_reg1, 243 adtscrc_end_reg2, 244 drmcrc_start_reg, 245 drmcrc_end_reg, 246 next_channel, 247 next_channel_loop, 248 link_sequence, 249 end_of_sequence 250 } rbd_id_t; 251 252 struct element_list { 253 const rbd_id_t *id; 254 const struct element_list *next[2]; 255 }; 256 257 typedef struct element_list element_list_t; 258 /** 259 * \brief get elementary stream pieces list for given parameters. 260 * \param aot audio object type 261 * \param epConfig the epConfig value from the current Audio Specific Config 262 * \param nChannels amount of channels contained in the current element. 263 * \param layer the layer of the current element. 264 * \return element_list_t parser guidance structure. 265 */ 266 const element_list_t * getBitstreamElementList(AUDIO_OBJECT_TYPE aot, SCHAR epConfig, UCHAR nChannels, UCHAR layer); 267 268 269 #endif 270 271
