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 decoder 87 */ 88 #ifndef __SBR_DEC_H 89 #define __SBR_DEC_H 90 91 #include "sbrdecoder.h" 92 93 #include "lpp_tran.h" 94 #include "qmf.h" 95 #include "env_calc.h" 96 #include "FDK_audio.h" 97 98 99 #include "sbrdec_drc.h" 100 101 #define SACDEC_ALIGNMENT_FIX 102 103 typedef struct 104 { 105 QMF_FILTER_BANK AnalysiscQMF; 106 QMF_FILTER_BANK SynthesisQMF; 107 108 SBR_CALCULATE_ENVELOPE SbrCalculateEnvelope; 109 SBR_LPP_TRANS LppTrans; 110 111 QMF_SCALE_FACTOR sbrScaleFactor; 112 QMF_SCALE_FACTOR sbrScaleFactorRight; 113 114 /*! Delayed spectral data needed for the dynamic framing of SBR. Not required in case of CLDFB */ 115 FIXP_DBL * pSbrOverlapBuffer; 116 117 /* References to workbuffers */ 118 FIXP_DBL * WorkBuffer1; 119 FIXP_DBL * WorkBuffer2; 120 121 /* Delayed time input signal needed to align CLDFD with LD-MPS QMF. */ 122 INT_PCM coreDelayBuf[(96)]; 123 124 /* QMF filter states */ 125 FIXP_QAS anaQmfStates[(320)]; 126 FIXP_QSS * pSynQmfStates; 127 128 /* Reference pointer arrays for QMF time slots, 129 mixed among overlap and current slots. */ 130 FIXP_DBL * QmfBufferReal[(((1024)/(32))+(6))]; 131 FIXP_DBL * QmfBufferImag[(((1024)/(32))+(6))]; 132 int useLP; 133 134 /* QMF domain extension time slot reference pointer array */ 135 136 SBRDEC_DRC_CHANNEL sbrDrcChannel; 137 138 } SBR_DEC; 139 140 typedef SBR_DEC *HANDLE_SBR_DEC; 141 142 143 typedef struct 144 { 145 SBR_FRAME_DATA frameData[(1)+1]; 146 SBR_PREV_FRAME_DATA prevFrameData; 147 SBR_DEC SbrDec; 148 } 149 SBR_CHANNEL; 150 151 typedef SBR_CHANNEL *HANDLE_SBR_CHANNEL; 152 153 void 154 SbrDecodeAndProcess (HANDLE_SBR_DEC hSbrDec, 155 INT_PCM *timeIn, 156 HANDLE_SBR_HEADER_DATA hHeaderData, 157 HANDLE_SBR_FRAME_DATA hFrameData, 158 HANDLE_SBR_PREV_FRAME_DATA hPrevFrameData, 159 int applyProcessing, 160 int channelNr 161 , UCHAR useLP 162 ); 163 164 165 void 166 SbrConstructTimeOutput (HANDLE_SBR_DEC hSbrDec, /*!< handle to Decoder channel */ 167 INT_PCM *timeOut, /*!< pointer to output time signal */ 168 HANDLE_SBR_HEADER_DATA hHeaderData,/*!< Static control data */ 169 HANDLE_SBR_PREV_FRAME_DATA hPrevFrameData, /*!< Some control data of last frame */ 170 int channelNr 171 ,UCHAR useLP 172 ); 173 174 175 void 176 sbr_dec (HANDLE_SBR_DEC hSbrDec, /*!< handle to Decoder channel */ 177 INT_PCM *timeIn, /*!< pointer to input time signal */ 178 INT_PCM *timeOut, /*!< pointer to output time signal */ 179 HANDLE_SBR_DEC hSbrDecRight, /*!< handle to Decoder channel right */ 180 INT_PCM *timeOutRight, /*!< pointer to output time signal */ 181 const int strideIn, /*!< Time data traversal strideIn */ 182 const int strideOut, /*!< Time data traversal strideOut */ 183 HANDLE_SBR_HEADER_DATA hHeaderData,/*!< Static control data */ 184 HANDLE_SBR_FRAME_DATA hFrameData, /*!< Control data of current frame */ 185 HANDLE_SBR_PREV_FRAME_DATA hPrevFrameData, /*!< Some control data of last frame */ 186 const int applyProcessing, /*!< Flag for SBR operation */ 187 HANDLE_PS_DEC h_ps_d, 188 const UINT flags, 189 const int codecFrameSize 190 ); 191 192 193 194 SBR_ERROR 195 createSbrDec (SBR_CHANNEL * hSbrChannel, 196 HANDLE_SBR_HEADER_DATA hHeaderData, 197 TRANSPOSER_SETTINGS *pSettings, 198 const int downsampleFac, 199 const UINT qmfFlags, 200 const UINT flags, 201 const int overlap, 202 int chan); 203 204 int 205 deleteSbrDec (SBR_CHANNEL * hSbrChannel); 206 207 SBR_ERROR 208 resetSbrDec (HANDLE_SBR_DEC hSbrDec, 209 HANDLE_SBR_HEADER_DATA hHeaderData, 210 HANDLE_SBR_PREV_FRAME_DATA hPrevFrameData, 211 const int useLP, 212 const int downsampleFac); 213 214 #endif 215
