1 2 /* ----------------------------------------------------------------------------------------------------------- 3 Software License for The Fraunhofer FDK AAC Codec Library for Android 4 5 Copyright 1995 - 2012 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 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 sbrdata 129 */ 130 SR_MODE sampleRateMode; 131 132 /* 133 element of channelpairelement 134 */ 135 INT coupling; 136 INT prev_coupling; 137 138 /* 139 element of singlechannelelement 140 */ 141 142 }; 143 typedef struct SBR_HEADER_DATA *HANDLE_SBR_HEADER_DATA; 144 145 struct SBR_ENV_DATA 146 { 147 148 INT sbr_xpos_ctrl; 149 INT freq_res_fixfix; 150 151 152 INVF_MODE sbr_invf_mode; 153 INVF_MODE sbr_invf_mode_vec[MAX_NUM_NOISE_VALUES]; 154 155 XPOS_MODE sbr_xpos_mode; 156 157 INT ienvelope[MAX_ENVELOPES][MAX_FREQ_COEFFS]; 158 159 INT codeBookScfLavBalance; 160 INT codeBookScfLav; 161 const INT *hufftableTimeC; 162 const INT *hufftableFreqC; 163 const UCHAR *hufftableTimeL; 164 const UCHAR *hufftableFreqL; 165 166 const INT *hufftableLevelTimeC; 167 const INT *hufftableBalanceTimeC; 168 const INT *hufftableLevelFreqC; 169 const INT *hufftableBalanceFreqC; 170 const UCHAR *hufftableLevelTimeL; 171 const UCHAR *hufftableBalanceTimeL; 172 const UCHAR *hufftableLevelFreqL; 173 const UCHAR *hufftableBalanceFreqL; 174 175 176 const UCHAR *hufftableNoiseTimeL; 177 const INT *hufftableNoiseTimeC; 178 const UCHAR *hufftableNoiseFreqL; 179 const INT *hufftableNoiseFreqC; 180 181 const UCHAR *hufftableNoiseLevelTimeL; 182 const INT *hufftableNoiseLevelTimeC; 183 const UCHAR *hufftableNoiseBalanceTimeL; 184 const INT *hufftableNoiseBalanceTimeC; 185 const UCHAR *hufftableNoiseLevelFreqL; 186 const INT *hufftableNoiseLevelFreqC; 187 const UCHAR *hufftableNoiseBalanceFreqL; 188 const INT *hufftableNoiseBalanceFreqC; 189 190 HANDLE_SBR_GRID hSbrBSGrid; 191 192 INT noHarmonics; 193 INT addHarmonicFlag; 194 UCHAR addHarmonic[MAX_FREQ_COEFFS]; 195 196 197 /* calculated helper vars */ 198 INT si_sbr_start_env_bits_balance; 199 INT si_sbr_start_env_bits; 200 INT si_sbr_start_noise_bits_balance; 201 INT si_sbr_start_noise_bits; 202 203 INT noOfEnvelopes; 204 INT noScfBands[MAX_ENVELOPES]; 205 INT domain_vec[MAX_ENVELOPES]; 206 INT domain_vec_noise[MAX_ENVELOPES]; 207 SCHAR sbr_noise_levels[MAX_FREQ_COEFFS]; 208 INT noOfnoisebands; 209 210 INT balance; 211 AMP_RES init_sbr_amp_res; 212 AMP_RES currentAmpResFF; 213 214 /* extended data */ 215 INT extended_data; 216 INT extension_size; 217 INT extension_id; 218 UCHAR extended_data_buffer[SBR_EXTENDED_DATA_MAX_CNT]; 219 220 UCHAR ldGrid; 221 }; 222 typedef struct SBR_ENV_DATA *HANDLE_SBR_ENV_DATA; 223 224 225 226 INT FDKsbrEnc_WriteEnvSingleChannelElement(struct SBR_HEADER_DATA *sbrHeaderData, 227 struct T_PARAMETRIC_STEREO *hParametricStereo, 228 struct SBR_BITSTREAM_DATA *sbrBitstreamData, 229 struct SBR_ENV_DATA *sbrEnvData, 230 struct COMMON_DATA *cmonData, 231 UINT sbrSyntaxFlags); 232 233 234 INT FDKsbrEnc_WriteEnvChannelPairElement(struct SBR_HEADER_DATA *sbrHeaderData, 235 struct T_PARAMETRIC_STEREO *hParametricStereo, 236 struct SBR_BITSTREAM_DATA *sbrBitstreamData, 237 struct SBR_ENV_DATA *sbrEnvDataLeft, 238 struct SBR_ENV_DATA *sbrEnvDataRight, 239 struct COMMON_DATA *cmonData, 240 UINT sbrSyntaxFlags); 241 242 243 244 INT FDKsbrEnc_CountSbrChannelPairElement (struct SBR_HEADER_DATA *sbrHeaderData, 245 struct T_PARAMETRIC_STEREO *hParametricStereo, 246 struct SBR_BITSTREAM_DATA *sbrBitstreamData, 247 struct SBR_ENV_DATA *sbrEnvDataLeft, 248 struct SBR_ENV_DATA *sbrEnvDataRight, 249 struct COMMON_DATA *cmonData, 250 UINT sbrSyntaxFlags); 251 252 253 254 /* debugging and tuning functions */ 255 256 /*#define SBR_ENV_STATISTICS */ 257 258 259 /*#define SBR_PAYLOAD_MONITOR*/ 260 261 #endif 262
