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 /**************************** AAC decoder library ****************************** 96 97 Author(s): Christian Griebel 98 99 Description: Dynamic range control (DRC) decoder tool for AAC 100 101 *******************************************************************************/ 102 103 #ifndef AACDEC_DRC_H 104 #define AACDEC_DRC_H 105 106 #include "tp_data.h" /* for program config element support */ 107 108 #include "aacdec_drc_types.h" 109 #include "channel.h" 110 #include "FDK_bitstream.h" 111 112 #define AACDEC_DRC_DFLT_EXPIRY_FRAMES \ 113 (0) /* Default DRC data expiry time in AAC frames */ 114 115 /* #define AACDEC_DRC_IGNORE_FRAMES_WITH_MULTIPLE_CH_THREADS */ /* The name says 116 it all. */ 117 /* #define AACDEC_DRC_DEBUG */ 118 119 /** 120 * \brief DRC module setting parameters 121 */ 122 typedef enum { 123 DRC_CUT_SCALE = 0, 124 DRC_BOOST_SCALE, 125 TARGET_REF_LEVEL, 126 DRC_BS_DELAY, 127 DRC_DATA_EXPIRY_FRAME, 128 APPLY_NORMALIZATION, 129 APPLY_HEAVY_COMPRESSION, 130 DEFAULT_PRESENTATION_MODE, 131 ENCODER_TARGET_LEVEL, 132 MAX_OUTPUT_CHANNELS, 133 UNIDRC_PRECEDENCE 134 } AACDEC_DRC_PARAM; 135 136 /** 137 * \brief DRC module interface functions 138 */ 139 void aacDecoder_drcInit(HANDLE_AAC_DRC self); 140 141 void aacDecoder_drcInitChannelData(CDrcChannelData *pDrcChannel); 142 143 AAC_DECODER_ERROR aacDecoder_drcSetParam(HANDLE_AAC_DRC self, 144 AACDEC_DRC_PARAM param, INT value); 145 146 int aacDecoder_drcMarkPayload(HANDLE_AAC_DRC self, HANDLE_FDK_BITSTREAM hBs, 147 AACDEC_DRC_PAYLOAD_TYPE type); 148 149 int aacDecoder_drcProlog( 150 HANDLE_AAC_DRC self, HANDLE_FDK_BITSTREAM hBs, 151 CAacDecoderStaticChannelInfo *pAacDecoderStaticChannelInfo[], 152 UCHAR pceInstanceTag, UCHAR channelMapping[], int validChannels); 153 154 /** 155 * \brief Apply DRC. If SBR is present, DRC data is handed over to the SBR 156 * decoder. 157 * \param self AAC decoder instance 158 * \param pSbrDec pointer to SBR decoder instance 159 * \param pAacDecoderChannelInfo AAC decoder channel instance to be processed 160 * \param pDrcDat DRC channel data 161 * \param extGain Pointer to a FIXP_DBL where a externally applyable gain will 162 * be stored into (independently on whether it will be apply internally or not). 163 * At function call the buffer must hold the scale (0 >= scale < 164 * DFRACT_BITS) to be applied on the gain value. 165 * \param ch channel index 166 * \param aacFrameSize AAC frame size 167 * \param bSbrPresent flag indicating that SBR is present, in which case DRC is 168 * handed over to the SBR instance pSbrDec 169 */ 170 void aacDecoder_drcApply(HANDLE_AAC_DRC self, void *pSbrDec, 171 CAacDecoderChannelInfo *pAacDecoderChannelInfo, 172 CDrcChannelData *pDrcDat, FIXP_DBL *extGain, int ch, 173 int aacFrameSize, int bSbrPresent); 174 175 int aacDecoder_drcEpilog( 176 HANDLE_AAC_DRC self, HANDLE_FDK_BITSTREAM hBs, 177 CAacDecoderStaticChannelInfo *pAacDecoderStaticChannelInfo[], 178 UCHAR pceInstanceTag, UCHAR channelMapping[], int validChannels); 179 180 /** 181 * \brief Get metadata information found in bitstream. 182 * \param self DRC module instance handle. 183 * \param pPresMode Pointer to field where the presentation mode will be written 184 * to. 185 * \param pProgRefLevel Pointer to field where the program reference level will 186 * be written to. 187 * \return Nothing. 188 */ 189 void aacDecoder_drcGetInfo(HANDLE_AAC_DRC self, SCHAR *pPresMode, 190 SCHAR *pProgRefLevel); 191 192 #endif /* AACDEC_DRC_H */ 193