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 /******************* MPEG transport format encoder library ********************* 96 97 Author(s): 98 99 Description: ADIF Transport Headers writing 100 101 *******************************************************************************/ 102 103 #include "tpenc_adif.h" 104 105 #include "tpenc_lib.h" 106 #include "tpenc_asc.h" 107 108 int adifWrite_EncodeHeader(ADIF_INFO *adif, HANDLE_FDK_BITSTREAM hBs, 109 INT adif_buffer_fullness) { 110 /* ADIF/PCE/ADTS definitions */ 111 const char adifId[5] = "ADIF"; 112 const int copyRightIdPresent = 0; 113 const int originalCopy = 0; 114 const int home = 0; 115 int err = 0; 116 117 int i; 118 119 INT totalBitRate = adif->bitRate; 120 121 if (adif->headerWritten) return 0; 122 123 /* Align inside PCE with respect to the first bit of the header */ 124 UINT alignAnchor = FDKgetValidBits(hBs); 125 126 /* Signal variable bitrate if buffer fullnes exceeds 20 bit */ 127 adif->bVariableRate = (adif_buffer_fullness >= (INT)(0x1 << 20)) ? 1 : 0; 128 129 FDKwriteBits(hBs, adifId[0], 8); 130 FDKwriteBits(hBs, adifId[1], 8); 131 FDKwriteBits(hBs, adifId[2], 8); 132 FDKwriteBits(hBs, adifId[3], 8); 133 134 FDKwriteBits(hBs, copyRightIdPresent ? 1 : 0, 1); 135 136 if (copyRightIdPresent) { 137 for (i = 0; i < 72; i++) { 138 FDKwriteBits(hBs, 0, 1); 139 } 140 } 141 FDKwriteBits(hBs, originalCopy ? 1 : 0, 1); 142 FDKwriteBits(hBs, home ? 1 : 0, 1); 143 FDKwriteBits(hBs, adif->bVariableRate ? 1 : 0, 1); 144 FDKwriteBits(hBs, totalBitRate, 23); 145 146 /* we write only one PCE at the moment */ 147 FDKwriteBits(hBs, 0, 4); 148 149 if (!adif->bVariableRate) { 150 FDKwriteBits(hBs, adif_buffer_fullness, 20); 151 } 152 /* Write PCE */ 153 transportEnc_writePCE(hBs, adif->cm, adif->samplingRate, adif->instanceTag, 154 adif->profile, adif->matrixMixdownA, 155 (adif->pseudoSurroundEnable) ? 1 : 0, alignAnchor); 156 157 return err; 158 } 159 160 int adifWrite_GetHeaderBits(ADIF_INFO *adif) { 161 /* ADIF definitions */ 162 const int copyRightIdPresent = 0; 163 164 if (adif->headerWritten) return 0; 165 166 int bits = 0; 167 168 bits += 8 * 4; /* ADIF ID */ 169 170 bits += 1; /* Copyright present */ 171 172 if (copyRightIdPresent) bits += 72; /* Copyright ID */ 173 174 bits += 26; 175 176 bits += 4; /* Number of PCE's */ 177 178 if (!adif->bVariableRate) { 179 bits += 20; 180 } 181 182 /* write PCE */ 183 bits = transportEnc_GetPCEBits(adif->cm, adif->matrixMixdownA, bits); 184 185 return bits; 186 } 187
