1 /* ----------------------------------------------------------------------------- 2 Software License for The Fraunhofer FDK AAC Codec Library for Android 3 4 Copyright 1995 - 2018 Fraunhofer-Gesellschaft zur Frderung 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 (at) iis.fraunhofer.de 93 ----------------------------------------------------------------------------- */ 94 95 /************************* System integration library ************************** 96 97 Author(s): Thomas Dietzen 98 99 Description: 100 101 *******************************************************************************/ 102 103 /** \file syslib_channelMapDescr.h 104 * \brief Function and structure declarations for the channel map descriptor implementation. 105 */ 106 107 #ifndef SYSLIB_CHANNELMAPDESCR_H 108 #define SYSLIB_CHANNELMAPDESCR_H 109 110 #include "machine_type.h" 111 112 /** 113 * \brief Contains information needed for a single channel map. 114 */ 115 typedef struct { 116 const UCHAR* 117 pChannelMap; /*!< Actual channel mapping for one single configuration. */ 118 UCHAR numChannels; /*!< The number of channels for the channel map which is 119 the maximum used channel index+1. */ 120 } CHANNEL_MAP_INFO; 121 122 /** 123 * \brief This is the main data struct. It contains the mapping for all 124 * channel configurations such as administration information. 125 * 126 * CAUTION: Do not access this structure directly from a algorithm specific 127 * library. Always use one of the API access functions below! 128 */ 129 typedef struct { 130 const CHANNEL_MAP_INFO* pMapInfoTab; /*!< Table of channel maps. */ 131 UINT mapInfoTabLen; /*!< Length of the channel map table array. */ 132 UINT fPassThrough; /*!< Flag that defines whether the specified mapping shall 133 be applied (value: 0) or the input just gets passed 134 through (MPEG mapping). */ 135 } FDK_channelMapDescr; 136 137 #ifdef __cplusplus 138 extern "C" { 139 #endif 140 141 /** 142 * \brief Initialize a given channel map descriptor. 143 * 144 * \param pMapDescr Pointer to a channel map descriptor to be initialized. 145 * \param pMapInfoTab Table of channel maps to initizalize the descriptor 146 with. 147 * If a NULL pointer is given a default table for 148 WAV-like mapping will be used. 149 * \param mapInfoTabLen Length of the channel map table array (pMapInfoTab). 150 If a zero length is given a default table for WAV-like mapping will be used. 151 * \param fPassThrough If the flag is set the reordering (given by 152 pMapInfoTab) will be bypassed. 153 */ 154 void FDK_chMapDescr_init(FDK_channelMapDescr* const pMapDescr, 155 const CHANNEL_MAP_INFO* const pMapInfoTab, 156 const UINT mapInfoTabLen, const UINT fPassThrough); 157 158 /** 159 * \brief Change the channel reordering state of a given channel map 160 * descriptor. 161 * 162 * \param pMapDescr Pointer to a (initialized) channel map descriptor. 163 * \param fPassThrough If the flag is set the reordering (given by 164 * pMapInfoTab) will be bypassed. 165 * \return Value unequal to zero if set operation was not 166 * successful. And zero on success. 167 */ 168 int FDK_chMapDescr_setPassThrough(FDK_channelMapDescr* const pMapDescr, 169 UINT fPassThrough); 170 171 /** 172 * \brief Get the mapping value for a specific channel and map index. 173 * 174 * \param pMapDescr Pointer to channel map descriptor. 175 * \param chIdx Channel index. 176 * \param mapIdx Mapping index (corresponding to the channel configuration 177 * index). 178 * \return Mapping value. 179 */ 180 UCHAR FDK_chMapDescr_getMapValue(const FDK_channelMapDescr* const pMapDescr, 181 const UCHAR chIdx, const UINT mapIdx); 182 183 /** 184 * \brief Evaluate whether channel map descriptor is reasonable or not. 185 * 186 * \param pMapDescr Pointer to channel map descriptor. 187 * \return Value unequal to zero if descriptor is valid, otherwise 188 * zero. 189 */ 190 int FDK_chMapDescr_isValid(const FDK_channelMapDescr* const pMapDescr); 191 192 #ifdef __cplusplus 193 } 194 #endif 195 196 #endif /* !defined(SYSLIB_CHANNELMAPDESCR_H) */ 197
