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 /**************************** AAC encoder library ****************************** 96 97 Author(s): M.Werner 98 99 Description: Psychoaccoustic data 100 101 *******************************************************************************/ 102 103 #ifndef PSY_DATA_H 104 #define PSY_DATA_H 105 106 #include "block_switch.h" 107 #include "mdct.h" 108 109 /* Be careful with MAX_SFB_LONG as length of the .Long arrays. 110 * sfbEnergy.Long and sfbEnergyMS.Long and sfbThreshold.Long are used as a 111 * temporary storage for the regrouped short energies and thresholds between 112 * FDKaacEnc_groupShortData() and BuildInterface() in FDKaacEnc_psyMain(). The 113 * space required for this is MAX_GROUPED_SFB ( = MAX_NO_OF_GROUPS*MAX_SFB_SHORT 114 * ). However, this is not important if unions are used (which is not possible 115 * with pfloat). */ 116 117 typedef shouldBeUnion { 118 FIXP_DBL Long[MAX_GROUPED_SFB]; 119 FIXP_DBL Short[TRANS_FAC][MAX_SFB_SHORT]; 120 } 121 SFB_THRESHOLD; 122 123 typedef shouldBeUnion { 124 FIXP_DBL Long[MAX_GROUPED_SFB]; 125 FIXP_DBL Short[TRANS_FAC][MAX_SFB_SHORT]; 126 } 127 SFB_ENERGY; 128 129 typedef shouldBeUnion { 130 FIXP_DBL Long[MAX_GROUPED_SFB]; 131 FIXP_DBL Short[TRANS_FAC][MAX_SFB_SHORT]; 132 } 133 SFB_LD_ENERGY; 134 135 typedef shouldBeUnion { 136 INT Long[MAX_GROUPED_SFB]; 137 INT Short[TRANS_FAC][MAX_SFB_SHORT]; 138 } 139 SFB_MAX_SCALE; 140 141 typedef struct { 142 INT_PCM* psyInputBuffer; 143 FIXP_DBL overlapAddBuffer[3 * 512 / 2]; 144 145 mdct_t mdctPers; /* MDCT persistent data */ 146 BLOCK_SWITCHING_CONTROL blockSwitchingControl; /* block switching */ 147 FIXP_DBL sfbThresholdnm1[MAX_SFB]; /* FDKaacEnc_PreEchoControl */ 148 INT mdctScalenm1; /* scale of last block's mdct (FDKaacEnc_PreEchoControl) */ 149 INT calcPreEcho; 150 INT isLFE; 151 } PSY_STATIC; 152 153 typedef struct { 154 FIXP_DBL* mdctSpectrum; 155 SFB_THRESHOLD sfbThreshold; /* adapt */ 156 SFB_ENERGY sfbEnergy; /* sfb energies */ 157 SFB_LD_ENERGY sfbEnergyLdData; /* sfb energies in ldData format */ 158 SFB_MAX_SCALE sfbMaxScaleSpec; 159 SFB_ENERGY sfbEnergyMS; /* mid/side sfb energies */ 160 FIXP_DBL sfbEnergyMSLdData[MAX_GROUPED_SFB]; /* mid/side sfb energies in 161 ldData format */ 162 SFB_ENERGY sfbSpreadEnergy; 163 INT mdctScale; /* exponent of data in mdctSpectrum */ 164 INT groupedSfbOffset[MAX_GROUPED_SFB + 1]; 165 INT sfbActive; 166 INT lowpassLine; 167 } PSY_DATA; 168 169 #endif /* PSY_DATA_H */ 170
