1 2 /* ----------------------------------------------------------------------------------------------------------- 3 Software License for The Fraunhofer FDK AAC Codec Library for Android 4 5 Copyright 1995 - 2013 Fraunhofer-Gesellschaft zur Frderung der angewandten Forschung e.V. 6 All rights reserved. 7 8 1. INTRODUCTION 9 The Fraunhofer FDK AAC Codec Library for Android ("FDK AAC Codec") is software that implements 10 the MPEG Advanced Audio Coding ("AAC") encoding and decoding scheme for digital audio. 11 This FDK AAC Codec software is intended to be used on a wide variety of Android devices. 12 13 AAC's HE-AAC and HE-AAC v2 versions are regarded as today's most efficient general perceptual 14 audio codecs. AAC-ELD is considered the best-performing full-bandwidth communications codec by 15 independent studies and is widely deployed. AAC has been standardized by ISO and IEC as part 16 of the MPEG specifications. 17 18 Patent licenses for necessary patent claims for the FDK AAC Codec (including those of Fraunhofer) 19 may be obtained through Via Licensing (www.vialicensing.com) or through the respective patent owners 20 individually for the purpose of encoding or decoding bit streams in products that are compliant with 21 the ISO/IEC MPEG audio standards. Please note that most manufacturers of Android devices already license 22 these patent claims through Via Licensing or directly from the patent owners, and therefore FDK AAC Codec 23 software may already be covered under those patent licenses when it is used for those licensed purposes only. 24 25 Commercially-licensed AAC software libraries, including floating-point versions with enhanced sound quality, 26 are also available from Fraunhofer. Users are encouraged to check the Fraunhofer website for additional 27 applications information and documentation. 28 29 2. COPYRIGHT LICENSE 30 31 Redistribution and use in source and binary forms, with or without modification, are permitted without 32 payment of copyright license fees provided that you satisfy the following conditions: 33 34 You must retain the complete text of this software license in redistributions of the FDK AAC Codec or 35 your modifications thereto in source code form. 36 37 You must retain the complete text of this software license in the documentation and/or other materials 38 provided with redistributions of the FDK AAC Codec or your modifications thereto in binary form. 39 You must make available free of charge copies of the complete source code of the FDK AAC Codec and your 40 modifications thereto to recipients of copies in binary form. 41 42 The name of Fraunhofer may not be used to endorse or promote products derived from this library without 43 prior written permission. 44 45 You may not charge copyright license fees for anyone to use, copy or distribute the FDK AAC Codec 46 software or your modifications thereto. 47 48 Your modified versions of the FDK AAC Codec must carry prominent notices stating that you changed the software 49 and the date of any change. For modified versions of the FDK AAC Codec, the term 50 "Fraunhofer FDK AAC Codec Library for Android" must be replaced by the term 51 "Third-Party Modified Version of the Fraunhofer FDK AAC Codec Library for Android." 52 53 3. NO PATENT LICENSE 54 55 NO EXPRESS OR IMPLIED LICENSES TO ANY PATENT CLAIMS, including without limitation the patents of Fraunhofer, 56 ARE GRANTED BY THIS SOFTWARE LICENSE. Fraunhofer provides no warranty of patent non-infringement with 57 respect to this software. 58 59 You may use this FDK AAC Codec software or modifications thereto only for purposes that are authorized 60 by appropriate patent licenses. 61 62 4. DISCLAIMER 63 64 This FDK AAC Codec software is provided by Fraunhofer on behalf of the copyright holders and contributors 65 "AS IS" and WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, including but not limited to the implied warranties 66 of merchantability and fitness for a particular purpose. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR 67 CONTRIBUTORS BE LIABLE for any direct, indirect, incidental, special, exemplary, or consequential damages, 68 including but not limited to procurement of substitute goods or services; loss of use, data, or profits, 69 or business interruption, however caused and on any theory of liability, whether in contract, strict 70 liability, or tort (including negligence), arising in any way out of the use of this software, even if 71 advised of the possibility of such damage. 72 73 5. CONTACT INFORMATION 74 75 Fraunhofer Institute for Integrated Circuits IIS 76 Attention: Audio and Multimedia Departments - FDK AAC LL 77 Am Wolfsmantel 33 78 91058 Erlangen, Germany 79 80 www.iis.fraunhofer.de/amm 81 amm-info (at) iis.fraunhofer.de 82 ----------------------------------------------------------------------------------------------------------- */ 83 84 /***************************** MPEG-4 AAC Decoder ************************** 85 86 Author(s): Christian Griebel 87 Description: Dynamic range control (DRC) decoder tool for AAC 88 89 ******************************************************************************/ 90 91 #ifndef AACDEC_DRC_H 92 #define AACDEC_DRC_H 93 94 #include "tp_data.h" /* for program config element support */ 95 96 97 #include "aacdec_drc_types.h" 98 #include "channel.h" 99 #include "FDK_bitstream.h" 100 101 #define AACDEC_DRC_DFLT_EXPIRY_FRAMES ( 50 ) /* Default DRC data expiry time in AAC frames */ 102 103 /** 104 * \brief DRC module setting parameters 105 */ 106 typedef enum 107 { 108 DRC_CUT_SCALE = 0, 109 DRC_BOOST_SCALE, 110 TARGET_REF_LEVEL, 111 DRC_BS_DELAY, 112 DRC_DATA_EXPIRY_FRAME, 113 APPLY_NORMALIZATION, 114 APPLY_HEAVY_COMPRESSION 115 116 } AACDEC_DRC_PARAM; 117 118 119 /** 120 * \brief DRC module interface functions 121 */ 122 void aacDecoder_drcInit ( 123 HANDLE_AAC_DRC self ); 124 125 void aacDecoder_drcInitChannelData ( 126 CDrcChannelData *pDrcChannel ); 127 128 AAC_DECODER_ERROR aacDecoder_drcSetParam ( 129 HANDLE_AAC_DRC self, 130 AACDEC_DRC_PARAM param, 131 INT value ); 132 133 int aacDecoder_drcMarkPayload ( 134 HANDLE_AAC_DRC self, 135 HANDLE_FDK_BITSTREAM hBs, 136 AACDEC_DRC_PAYLOAD_TYPE type ); 137 138 int aacDecoder_drcProlog ( 139 HANDLE_AAC_DRC self, 140 HANDLE_FDK_BITSTREAM hBs, 141 CAacDecoderStaticChannelInfo *pAacDecoderStaticChannelInfo[], 142 UCHAR pceInstanceTag, 143 UCHAR channelMapping[], 144 int numChannels ); 145 146 /** 147 * \brief Apply DRC. If SBR is present, DRC data is handed over to the SBR decoder. 148 * \param self AAC decoder instance 149 * \param pSbrDec pointer to SBR decoder instance 150 * \param pAacDecoderChannelInfo AAC decoder channel instance to be processed 151 * \param pDrcDat DRC channel data 152 * \param extGain Pointer to a FIXP_DBL where a externally applyable gain will be stored into (independently on whether it will be apply internally or not). 153 * At function call the buffer must hold the scale (0 >= scale < DFRACT_BITS) to be applied on the gain value. 154 * \param ch channel index 155 * \param aacFrameSize AAC frame size 156 * \param bSbrPresent flag indicating that SBR is present, in which case DRC is handed over to the SBR instance pSbrDec 157 */ 158 void aacDecoder_drcApply ( 159 HANDLE_AAC_DRC self, 160 void *pSbrDec, 161 CAacDecoderChannelInfo *pAacDecoderChannelInfo, 162 CDrcChannelData *pDrcDat, 163 FIXP_DBL *extGain, 164 int ch, 165 int aacFrameSize, 166 int bSbrPresent ); 167 168 int aacDecoder_drcEpilog ( 169 HANDLE_AAC_DRC self, 170 HANDLE_FDK_BITSTREAM hBs, 171 CAacDecoderStaticChannelInfo *pAacDecoderStaticChannelInfo[], 172 UCHAR pceInstanceTag, 173 UCHAR channelMapping[], 174 int validChannels ); 175 176 /** 177 * \brief Get metadata information found in bitstream. 178 * \param self DRC module instance handle. 179 * \param pPresMode Pointer to field where the presentation mode will be written to. 180 * \param pProgRefLevel Pointer to field where the program reference level will be written to. 181 * \return Nothing. 182 */ 183 void aacDecoder_drcGetInfo ( 184 HANDLE_AAC_DRC self, 185 SCHAR *pPresMode, 186 SCHAR *pProgRefLevel ); 187 188 189 #endif /* AACDEC_DRC_H */ 190
