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 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 /* QMF filter states */ 122 FIXP_QAS anaQmfStates[(320)]; 123 FIXP_QSS * pSynQmfStates; 124 125 /* Reference pointer arrays for QMF time slots, 126 mixed among overlap and current slots. */ 127 FIXP_DBL * QmfBufferReal[(((1024)/(32))+(6))]; 128 FIXP_DBL * QmfBufferImag[(((1024)/(32))+(6))]; 129 int useLP; 130 131 /* QMF domain extension time slot reference pointer array */ 132 133 SBRDEC_DRC_CHANNEL sbrDrcChannel; 134 135 } SBR_DEC; 136 137 typedef SBR_DEC *HANDLE_SBR_DEC; 138 139 140 typedef struct 141 { 142 SBR_FRAME_DATA frameData[(1)+1]; 143 SBR_PREV_FRAME_DATA prevFrameData; 144 SBR_DEC SbrDec; 145 } 146 SBR_CHANNEL; 147 148 typedef SBR_CHANNEL *HANDLE_SBR_CHANNEL; 149 150 void 151 SbrDecodeAndProcess (HANDLE_SBR_DEC hSbrDec, 152 INT_PCM *timeIn, 153 HANDLE_SBR_HEADER_DATA hHeaderData, 154 HANDLE_SBR_FRAME_DATA hFrameData, 155 HANDLE_SBR_PREV_FRAME_DATA hPrevFrameData, 156 int applyProcessing, 157 int channelNr 158 , UCHAR useLP 159 ); 160 161 162 void 163 SbrConstructTimeOutput (HANDLE_SBR_DEC hSbrDec, /*!< handle to Decoder channel */ 164 INT_PCM *timeOut, /*!< pointer to output time signal */ 165 HANDLE_SBR_HEADER_DATA hHeaderData,/*!< Static control data */ 166 HANDLE_SBR_PREV_FRAME_DATA hPrevFrameData, /*!< Some control data of last frame */ 167 int channelNr 168 ,UCHAR useLP 169 ); 170 171 172 void 173 sbr_dec (HANDLE_SBR_DEC hSbrDec, /*!< handle to Decoder channel */ 174 INT_PCM *timeIn, /*!< pointer to input time signal */ 175 INT_PCM *timeOut, /*!< pointer to output time signal */ 176 HANDLE_SBR_DEC hSbrDecRight, /*!< handle to Decoder channel right */ 177 INT_PCM *timeOutRight, /*!< pointer to output time signal */ 178 const int strideIn, /*!< Time data traversal strideIn */ 179 const int strideOut, /*!< Time data traversal strideOut */ 180 HANDLE_SBR_HEADER_DATA hHeaderData,/*!< Static control data */ 181 HANDLE_SBR_FRAME_DATA hFrameData, /*!< Control data of current frame */ 182 HANDLE_SBR_PREV_FRAME_DATA hPrevFrameData, /*!< Some control data of last frame */ 183 const int applyProcessing, /*!< Flag for SBR operation */ 184 HANDLE_PS_DEC h_ps_d, 185 const UINT flags 186 ); 187 188 189 190 SBR_ERROR 191 createSbrDec (SBR_CHANNEL * hSbrChannel, 192 HANDLE_SBR_HEADER_DATA hHeaderData, 193 TRANSPOSER_SETTINGS *pSettings, 194 const int downsampleFac, 195 const UINT qmfFlags, 196 const UINT flags, 197 const int overlap, 198 int chan); 199 200 int 201 deleteSbrDec (SBR_CHANNEL * hSbrChannel); 202 203 SBR_ERROR 204 resetSbrDec (HANDLE_SBR_DEC hSbrDec, 205 HANDLE_SBR_HEADER_DATA hHeaderData, 206 HANDLE_SBR_PREV_FRAME_DATA hPrevFrameData, 207 const int useLP, 208 const int downsampleFac); 209 210 #endif 211
