1 2 /* ----------------------------------------------------------------------------------------------------------- 3 Software License for The Fraunhofer FDK AAC Codec Library for Android 4 5 Copyright 1995 - 2012 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 /********************** Fraunhofer IIS FDK AAC Encoder lib ****************** 85 86 Author(s): M. Neusinger 87 Description: Compressor for AAC Metadata Generator 88 89 ******************************************************************************/ 90 91 #ifndef _METADATA_COMPRESSOR_H 92 #define _METADATA_COMPRESSOR_H 93 94 95 #include "FDK_audio.h" 96 #include "common_fix.h" 97 98 #include "aacenc.h" 99 100 101 /** 102 * DRC compression profiles. 103 */ 104 typedef enum DRC_PROFILE { 105 DRC_NONE = 0, 106 DRC_FILMSTANDARD = 1, 107 DRC_FILMLIGHT = 2, 108 DRC_MUSICSTANDARD = 3, 109 DRC_MUSICLIGHT = 4, 110 DRC_SPEECH = 5, 111 DRC_DELAY_TEST = 6 112 113 } DRC_PROFILE; 114 115 116 /** 117 * DRC Compressor handle. 118 */ 119 typedef struct DRC_COMP DRC_COMP, *HDRC_COMP; 120 121 /** 122 * \brief Open a DRC Compressor instance. 123 * 124 * Allocate memory for a compressor instance. 125 * 126 * \param phDrcComp A pointer to a compressor handle. Initialized on return. 127 * 128 * \return 129 * - 0, on succes. 130 * - unequal 0, on failure. 131 */ 132 INT FDK_DRC_Generator_Open( 133 HDRC_COMP *phDrcComp 134 ); 135 136 137 /** 138 * \brief Close the DRC Compressor instance. 139 * 140 * Deallocate instance and free whole memory. 141 * 142 * \param phDrcComp Pointer to the compressor handle to be deallocated. 143 * 144 * \return 145 * - 0, on succes. 146 * - unequal 0, on failure. 147 */ 148 INT FDK_DRC_Generator_Close( 149 HDRC_COMP *phDrcComp 150 ); 151 152 /** 153 * \brief Configure DRC Compressor. 154 * 155 * \param drcComp Compressor handle. 156 * \param profileLine DRC profile for line mode. 157 * \param profileRF DRC profile for RF mode. 158 * \param blockLength Length of processing block in samples per channel. 159 * \param sampleRate Sampling rate in Hz. 160 * \param channelMode Channel configuration. 161 * \param channelOrder Channel order, MPEG or WAV. 162 * \param useWeighting Use weighting filter for loudness calculation 163 * 164 * \return 165 * - 0, on success, 166 * - unequal 0, on failure 167 */ 168 INT FDK_DRC_Generator_Initialize( 169 HDRC_COMP drcComp, 170 const DRC_PROFILE profileLine, 171 const DRC_PROFILE profileRF, 172 const INT blockLength, 173 const UINT sampleRate, 174 const CHANNEL_MODE channelMode, 175 const CHANNEL_ORDER channelOrder, 176 const UCHAR useWeighting 177 ); 178 179 /** 180 * \brief Calculate DRC Compressor Gain. 181 * 182 * \param drcComp Compressor handle. 183 * \param inSamples Pointer to interleaved input audio samples. 184 * \param dialnorm Dialog Level in dB (typically -31...-1). 185 * \param drc_TargetRefLevel 186 * \param comp_TargetRefLevel 187 * \param clev Downmix center mix factor (typically 0.707, 0.595 or 0.5) 188 * \param slev Downmix surround mix factor (typically 0.707, 0.5, or 0) 189 * \param dynrng Pointer to variable receiving line mode DRC gain in dB 190 * \param compr Pointer to variable receiving RF mode DRC gain in dB 191 * 192 * \return 193 * - 0, on success, 194 * - unequal 0, on failure 195 */ 196 INT FDK_DRC_Generator_Calc( 197 HDRC_COMP drcComp, 198 const INT_PCM * const inSamples, 199 const INT dialnorm, 200 const INT drc_TargetRefLevel, 201 const INT comp_TargetRefLevel, 202 FIXP_DBL clev, 203 FIXP_DBL slev, 204 INT * const dynrng, 205 INT * const compr 206 ); 207 208 209 /** 210 * \brief Configure DRC Compressor Profile. 211 * 212 * \param drcComp Compressor handle. 213 * \param profileLine DRC profile for line mode. 214 * \param profileRF DRC profile for RF mode. 215 * 216 * \return 217 * - 0, on success, 218 * - unequal 0, on failure 219 */ 220 INT FDK_DRC_Generator_setDrcProfile( 221 HDRC_COMP drcComp, 222 const DRC_PROFILE profileLine, 223 const DRC_PROFILE profileRF 224 ); 225 226 227 /** 228 * \brief Get DRC profile for line mode. 229 * 230 * \param drcComp Compressor handle. 231 * 232 * \return Current Profile. 233 */ 234 DRC_PROFILE FDK_DRC_Generator_getDrcProfile( 235 const HDRC_COMP drcComp 236 ); 237 238 239 /** 240 * \brief Get DRC profile for RF mode. 241 * 242 * \param drcComp Compressor handle. 243 * 244 * \return Current Profile. 245 */ 246 DRC_PROFILE FDK_DRC_Generator_getCompProfile( 247 const HDRC_COMP drcComp 248 ); 249 250 251 #endif /* _METADATA_COMPRESSOR_H */ 252 253
