1 /* ----------------------------------------------------------------------------- 2 Software License for The Fraunhofer FDK AAC Codec Library for Android 3 4 © Copyright 1995 - 2018 Fraunhofer-Gesellschaft zur Förderung der angewandten 5 Forschung e.V. All rights reserved. 6 7 1. INTRODUCTION 8 The Fraunhofer FDK AAC Codec Library for Android ("FDK AAC Codec") is software 9 that implements the MPEG Advanced Audio Coding ("AAC") encoding and decoding 10 scheme for digital audio. This FDK AAC Codec software is intended to be used on 11 a wide variety of Android devices. 12 13 AAC's HE-AAC and HE-AAC v2 versions are regarded as today's most efficient 14 general perceptual audio codecs. AAC-ELD is considered the best-performing 15 full-bandwidth communications codec by independent studies and is widely 16 deployed. AAC has been standardized by ISO and IEC as part of the MPEG 17 specifications. 18 19 Patent licenses for necessary patent claims for the FDK AAC Codec (including 20 those of Fraunhofer) may be obtained through Via Licensing 21 (www.vialicensing.com) or through the respective patent owners individually for 22 the purpose of encoding or decoding bit streams in products that are compliant 23 with the ISO/IEC MPEG audio standards. Please note that most manufacturers of 24 Android devices already license these patent claims through Via Licensing or 25 directly from the patent owners, and therefore FDK AAC Codec software may 26 already be covered under those patent licenses when it is used for those 27 licensed purposes only. 28 29 Commercially-licensed AAC software libraries, including floating-point versions 30 with enhanced sound quality, are also available from Fraunhofer. Users are 31 encouraged to check the Fraunhofer website for additional applications 32 information and documentation. 33 34 2. COPYRIGHT LICENSE 35 36 Redistribution and use in source and binary forms, with or without modification, 37 are permitted without payment of copyright license fees provided that you 38 satisfy the following conditions: 39 40 You must retain the complete text of this software license in redistributions of 41 the FDK AAC Codec or your modifications thereto in source code form. 42 43 You must retain the complete text of this software license in the documentation 44 and/or other materials provided with redistributions of the FDK AAC Codec or 45 your modifications thereto in binary form. You must make available free of 46 charge copies of the complete source code of the FDK AAC Codec and your 47 modifications thereto to recipients of copies in binary form. 48 49 The name of Fraunhofer may not be used to endorse or promote products derived 50 from this library without prior written permission. 51 52 You may not charge copyright license fees for anyone to use, copy or distribute 53 the FDK AAC Codec software or your modifications thereto. 54 55 Your modified versions of the FDK AAC Codec must carry prominent notices stating 56 that you changed the software and the date of any change. For modified versions 57 of the FDK AAC Codec, the term "Fraunhofer FDK AAC Codec Library for Android" 58 must be replaced by the term "Third-Party Modified Version of the Fraunhofer FDK 59 AAC Codec Library for Android." 60 61 3. NO PATENT LICENSE 62 63 NO EXPRESS OR IMPLIED LICENSES TO ANY PATENT CLAIMS, including without 64 limitation the patents of Fraunhofer, ARE GRANTED BY THIS SOFTWARE LICENSE. 65 Fraunhofer provides no warranty of patent non-infringement with respect to this 66 software. 67 68 You may use this FDK AAC Codec software or modifications thereto only for 69 purposes that are authorized by appropriate patent licenses. 70 71 4. DISCLAIMER 72 73 This FDK AAC Codec software is provided by Fraunhofer on behalf of the copyright 74 holders and contributors "AS IS" and WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, 75 including but not limited to the implied warranties of merchantability and 76 fitness for a particular purpose. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR 77 CONTRIBUTORS BE LIABLE for any direct, indirect, incidental, special, exemplary, 78 or consequential damages, including but not limited to procurement of substitute 79 goods or services; loss of use, data, or profits, or business interruption, 80 however caused and on any theory of liability, whether in contract, strict 81 liability, or tort (including negligence), arising in any way out of the use of 82 this software, even if advised of the possibility of such damage. 83 84 5. CONTACT INFORMATION 85 86 Fraunhofer Institute for Integrated Circuits IIS 87 Attention: Audio and Multimedia Departments - FDK AAC LL 88 Am Wolfsmantel 33 89 91058 Erlangen, Germany 90 91 www.iis.fraunhofer.de/amm 92 amm-info@iis.fraunhofer.de 93 ----------------------------------------------------------------------------- */ 94 95 /**************************** SBR encoder library ****************************** 96 97 Author(s): M. Neuendorf, N. Rettelbach, M. Multrus 98 99 Description: PS Parameter extraction, encoding 100 101 *******************************************************************************/ 102 103 /*! 104 \file 105 \brief PS parameter extraction, encoding functions $Revision: 92790 $ 106 */ 107 108 #ifndef PS_ENCODE_H 109 #define PS_ENCODE_H 110 111 #include "ps_const.h" 112 #include "ps_bitenc.h" 113 114 #define IID_SCALE_FT (64.f) /* maxVal in Quant tab is +/- 50 */ 115 #define IID_SCALE 6 /* maxVal in Quant tab is +/- 50 */ 116 #define IID_MAXVAL (1 << IID_SCALE) 117 118 #define PS_QUANT_SCALE_FT \ 119 (64.f) /* error smaller (64-25)/64 * 20 bands * 4 env -> QuantScale 64 */ 120 #define PS_QUANT_SCALE \ 121 6 /* error smaller (64-25)/64 * 20 bands * 4 env -> QuantScale 6 bit */ 122 123 #define QMF_GROUPS_LO_RES 12 124 #define SUBQMF_GROUPS_LO_RES 10 125 #define QMF_GROUPS_HI_RES 18 126 #define SUBQMF_GROUPS_HI_RES 30 127 128 typedef struct T_PS_DATA { 129 INT iidEnable; 130 INT iidEnableLast; 131 INT iidQuantMode; 132 INT iidQuantModeLast; 133 INT iidDiffMode[PS_MAX_ENVELOPES]; 134 INT iidIdx[PS_MAX_ENVELOPES][PS_MAX_BANDS]; 135 INT iidIdxLast[PS_MAX_BANDS]; 136 137 INT iccEnable; 138 INT iccEnableLast; 139 INT iccQuantMode; 140 INT iccQuantModeLast; 141 INT iccDiffMode[PS_MAX_ENVELOPES]; 142 INT iccIdx[PS_MAX_ENVELOPES][PS_MAX_BANDS]; 143 INT iccIdxLast[PS_MAX_BANDS]; 144 145 INT nEnvelopesLast; 146 147 INT headerCnt; 148 INT iidTimeCnt; 149 INT iccTimeCnt; 150 INT noEnvCnt; 151 152 } PS_DATA, *HANDLE_PS_DATA; 153 154 typedef struct T_PS_ENCODE { 155 PS_DATA psData; 156 157 PS_BANDS psEncMode; 158 INT nQmfIidGroups; 159 INT nSubQmfIidGroups; 160 INT iidGroupBorders[QMF_GROUPS_HI_RES + SUBQMF_GROUPS_HI_RES + 1]; 161 INT subband2parameterIndex[QMF_GROUPS_HI_RES + SUBQMF_GROUPS_HI_RES]; 162 UCHAR iidGroupWidthLd[QMF_GROUPS_HI_RES + SUBQMF_GROUPS_HI_RES]; 163 FIXP_DBL iidQuantErrorThreshold; 164 165 UCHAR psBandNrgScale[PS_MAX_BANDS]; 166 167 } PS_ENCODE; 168 169 typedef struct T_PS_ENCODE *HANDLE_PS_ENCODE; 170 171 FDK_PSENC_ERROR FDKsbrEnc_CreatePSEncode(HANDLE_PS_ENCODE *phPsEncode); 172 173 FDK_PSENC_ERROR FDKsbrEnc_InitPSEncode(HANDLE_PS_ENCODE hPsEncode, 174 const PS_BANDS psEncMode, 175 const FIXP_DBL iidQuantErrorThreshold); 176 177 FDK_PSENC_ERROR FDKsbrEnc_DestroyPSEncode(HANDLE_PS_ENCODE *phPsEncode); 178 179 FDK_PSENC_ERROR FDKsbrEnc_PSEncode( 180 HANDLE_PS_ENCODE hPsEncode, HANDLE_PS_OUT hPsOut, UCHAR *dynBandScale, 181 UINT maxEnvelopes, 182 FIXP_DBL *hybridData[HYBRID_FRAMESIZE][MAX_PS_CHANNELS][2], 183 const INT frameSize, const INT sendHeader); 184 185 #endif 186