1 2 /* ----------------------------------------------------------------------------------------------------------- 3 Software License for The Fraunhofer FDK AAC Codec Library for Android 4 5 � Copyright 1995 - 2015 Fraunhofer-Gesellschaft zur F�rderung 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@iis.fraunhofer.de 82 ----------------------------------------------------------------------------------------------------------- */ 83 84 /*! 85 \file 86 \brief SBR bit writing 87 */ 88 #ifndef __BIT_SBR_H 89 #define __BIT_SBR_H 90 91 #include "sbr_def.h" 92 #include "cmondata.h" 93 #include "fram_gen.h" 94 95 struct SBR_ENV_DATA; 96 97 struct SBR_BITSTREAM_DATA 98 { 99 INT TotalBits; 100 INT PayloadBits; 101 INT FillBits; 102 INT HeaderActive; 103 INT NrSendHeaderData; /**< input from commandline */ 104 INT CountSendHeaderData; /**< modulo count. If < 0 then no counting is done (no SBR headers) */ 105 }; 106 107 typedef struct SBR_BITSTREAM_DATA *HANDLE_SBR_BITSTREAM_DATA; 108 109 struct SBR_HEADER_DATA 110 { 111 AMP_RES sbr_amp_res; 112 INT sbr_start_frequency; 113 INT sbr_stop_frequency; 114 INT sbr_xover_band; 115 INT sbr_noise_bands; 116 INT sbr_data_extra; 117 INT header_extra_1; 118 INT header_extra_2; 119 INT sbr_lc_stereo_mode; 120 INT sbr_limiter_bands; 121 INT sbr_limiter_gains; 122 INT sbr_interpol_freq; 123 INT sbr_smoothing_length; 124 INT alterScale; 125 INT freqScale; 126 127 /* 128 element of channelpairelement 129 */ 130 INT coupling; 131 INT prev_coupling; 132 133 /* 134 element of singlechannelelement 135 */ 136 137 }; 138 typedef struct SBR_HEADER_DATA *HANDLE_SBR_HEADER_DATA; 139 140 struct SBR_ENV_DATA 141 { 142 143 INT sbr_xpos_ctrl; 144 FREQ_RES freq_res_fixfix[2]; 145 UCHAR fResTransIsLow; 146 147 INVF_MODE sbr_invf_mode; 148 INVF_MODE sbr_invf_mode_vec[MAX_NUM_NOISE_VALUES]; 149 150 XPOS_MODE sbr_xpos_mode; 151 152 INT ienvelope[MAX_ENVELOPES][MAX_FREQ_COEFFS]; 153 154 INT codeBookScfLavBalance; 155 INT codeBookScfLav; 156 const INT *hufftableTimeC; 157 const INT *hufftableFreqC; 158 const UCHAR *hufftableTimeL; 159 const UCHAR *hufftableFreqL; 160 161 const INT *hufftableLevelTimeC; 162 const INT *hufftableBalanceTimeC; 163 const INT *hufftableLevelFreqC; 164 const INT *hufftableBalanceFreqC; 165 const UCHAR *hufftableLevelTimeL; 166 const UCHAR *hufftableBalanceTimeL; 167 const UCHAR *hufftableLevelFreqL; 168 const UCHAR *hufftableBalanceFreqL; 169 170 171 const UCHAR *hufftableNoiseTimeL; 172 const INT *hufftableNoiseTimeC; 173 const UCHAR *hufftableNoiseFreqL; 174 const INT *hufftableNoiseFreqC; 175 176 const UCHAR *hufftableNoiseLevelTimeL; 177 const INT *hufftableNoiseLevelTimeC; 178 const UCHAR *hufftableNoiseBalanceTimeL; 179 const INT *hufftableNoiseBalanceTimeC; 180 const UCHAR *hufftableNoiseLevelFreqL; 181 const INT *hufftableNoiseLevelFreqC; 182 const UCHAR *hufftableNoiseBalanceFreqL; 183 const INT *hufftableNoiseBalanceFreqC; 184 185 HANDLE_SBR_GRID hSbrBSGrid; 186 187 INT noHarmonics; 188 INT addHarmonicFlag; 189 UCHAR addHarmonic[MAX_FREQ_COEFFS]; 190 191 192 /* calculated helper vars */ 193 INT si_sbr_start_env_bits_balance; 194 INT si_sbr_start_env_bits; 195 INT si_sbr_start_noise_bits_balance; 196 INT si_sbr_start_noise_bits; 197 198 INT noOfEnvelopes; 199 INT noScfBands[MAX_ENVELOPES]; 200 INT domain_vec[MAX_ENVELOPES]; 201 INT domain_vec_noise[MAX_ENVELOPES]; 202 SCHAR sbr_noise_levels[MAX_FREQ_COEFFS]; 203 INT noOfnoisebands; 204 205 INT balance; 206 AMP_RES init_sbr_amp_res; 207 AMP_RES currentAmpResFF; 208 FIXP_DBL ton_HF[SBR_GLOBAL_TONALITY_VALUES]; /* tonality is scaled by 2^19/0.524288f (fract part of RELAXATION) */ 209 FIXP_DBL global_tonality; 210 211 /* extended data */ 212 INT extended_data; 213 INT extension_size; 214 INT extension_id; 215 UCHAR extended_data_buffer[SBR_EXTENDED_DATA_MAX_CNT]; 216 217 UCHAR ldGrid; 218 }; 219 typedef struct SBR_ENV_DATA *HANDLE_SBR_ENV_DATA; 220 221 222 223 INT FDKsbrEnc_WriteEnvSingleChannelElement(struct SBR_HEADER_DATA *sbrHeaderData, 224 struct T_PARAMETRIC_STEREO *hParametricStereo, 225 struct SBR_BITSTREAM_DATA *sbrBitstreamData, 226 struct SBR_ENV_DATA *sbrEnvData, 227 struct COMMON_DATA *cmonData, 228 UINT sbrSyntaxFlags); 229 230 231 INT FDKsbrEnc_WriteEnvChannelPairElement(struct SBR_HEADER_DATA *sbrHeaderData, 232 struct T_PARAMETRIC_STEREO *hParametricStereo, 233 struct SBR_BITSTREAM_DATA *sbrBitstreamData, 234 struct SBR_ENV_DATA *sbrEnvDataLeft, 235 struct SBR_ENV_DATA *sbrEnvDataRight, 236 struct COMMON_DATA *cmonData, 237 UINT sbrSyntaxFlags); 238 239 240 241 INT FDKsbrEnc_CountSbrChannelPairElement (struct SBR_HEADER_DATA *sbrHeaderData, 242 struct T_PARAMETRIC_STEREO *hParametricStereo, 243 struct SBR_BITSTREAM_DATA *sbrBitstreamData, 244 struct SBR_ENV_DATA *sbrEnvDataLeft, 245 struct SBR_ENV_DATA *sbrEnvDataRight, 246 struct COMMON_DATA *cmonData, 247 UINT sbrSyntaxFlags); 248 249 250 251 /* debugging and tuning functions */ 252 253 /*#define SBR_ENV_STATISTICS */ 254 255 256 /*#define SBR_PAYLOAD_MONITOR*/ 257 258 #endif 259