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. Neusinger 98 99 Description: Compressor for AAC Metadata Generator 100 101 *******************************************************************************/ 102 103 #ifndef METADATA_COMPRESSOR_H 104 #define METADATA_COMPRESSOR_H 105 106 #include "FDK_audio.h" 107 #include "common_fix.h" 108 109 #include "aacenc.h" 110 111 #define LFE_LEV_SCALE 2 112 113 /** 114 * DRC compression profiles. 115 */ 116 typedef enum DRC_PROFILE { 117 DRC_NONE = 0, 118 DRC_FILMSTANDARD = 1, 119 DRC_FILMLIGHT = 2, 120 DRC_MUSICSTANDARD = 3, 121 DRC_MUSICLIGHT = 4, 122 DRC_SPEECH = 5, 123 DRC_DELAY_TEST = 6, 124 DRC_NOT_PRESENT = -2 125 126 } DRC_PROFILE; 127 128 /** 129 * DRC Compressor handle. 130 */ 131 typedef struct DRC_COMP DRC_COMP, *HDRC_COMP; 132 133 /** 134 * \brief Open a DRC Compressor instance. 135 * 136 * Allocate memory for a compressor instance. 137 * 138 * \param phDrcComp A pointer to a compressor handle. Initialized on 139 * return. 140 * 141 * \return 142 * - 0, on succes. 143 * - unequal 0, on failure. 144 */ 145 INT FDK_DRC_Generator_Open(HDRC_COMP *phDrcComp); 146 147 /** 148 * \brief Close the DRC Compressor instance. 149 * 150 * Deallocate instance and free whole memory. 151 * 152 * \param phDrcComp Pointer to the compressor handle to be 153 * deallocated. 154 * 155 * \return 156 * - 0, on succes. 157 * - unequal 0, on failure. 158 */ 159 INT FDK_DRC_Generator_Close(HDRC_COMP *phDrcComp); 160 161 /** 162 * \brief Configure DRC Compressor. 163 * 164 * \param drcComp Compressor handle. 165 * \param profileLine DRC profile for line mode. 166 * \param profileRF DRC profile for RF mode. 167 * \param blockLength Length of processing block in samples per 168 * channel. 169 * \param sampleRate Sampling rate in Hz. 170 * \param channelMode Channel configuration. 171 * \param channelOrder Channel order, MPEG or WAV. 172 * \param useWeighting Use weighting filter for loudness calculation 173 * 174 * \return 175 * - 0, on success, 176 * - unequal 0, on failure 177 */ 178 INT FDK_DRC_Generator_Initialize(HDRC_COMP drcComp, 179 const DRC_PROFILE profileLine, 180 const DRC_PROFILE profileRF, 181 const INT blockLength, const UINT sampleRate, 182 const CHANNEL_MODE channelMode, 183 const CHANNEL_ORDER channelOrder, 184 const UCHAR useWeighting); 185 186 /** 187 * \brief Calculate DRC Compressor Gain. 188 * 189 * \param drcComp Compressor handle. 190 * \param inSamples Pointer to interleaved input audio samples. 191 * \param inSamplesBufSize Size of inSamples for one channel. 192 * \param dialnorm Dialog Level in dB (typically -31...-1). 193 * \param drc_TargetRefLevel 194 * \param comp_TargetRefLevel 195 * \param clev Downmix center mix factor (typically 0.707, 196 * 0.595 or 0.5) 197 * \param slev Downmix surround mix factor (typically 0.707, 198 * 0.5, or 0) 199 * \param ext_leva Downmix gain factor A 200 * \param ext_levb Downmix gain factor B 201 * \param lfe_lev LFE gain factor 202 * \param dmxGain5 Gain factor for downmix to 5 channels 203 * \param dmxGain2 Gain factor for downmix to 2 channels 204 * \param dynrng Pointer to variable receiving line mode DRC gain 205 * in dB 206 * \param compr Pointer to variable receiving RF mode DRC gain 207 * in dB 208 * 209 * \return 210 * - 0, on success, 211 * - unequal 0, on failure 212 */ 213 INT FDK_DRC_Generator_Calc(HDRC_COMP drcComp, const INT_PCM *const inSamples, 214 const UINT inSamplesBufSize, const INT dialnorm, 215 const INT drc_TargetRefLevel, 216 const INT comp_TargetRefLevel, const FIXP_DBL clev, 217 const FIXP_DBL slev, const FIXP_DBL ext_leva, 218 const FIXP_DBL ext_levb, const FIXP_DBL lfe_lev, 219 const INT dmxGain5, const INT dmxGain2, 220 INT *const dynrng, INT *const compr); 221 222 /** 223 * \brief Configure DRC Compressor Profile. 224 * 225 * \param drcComp Compressor handle. 226 * \param profileLine DRC profile for line mode. 227 * \param profileRF DRC profile for RF mode. 228 * 229 * \return 230 * - 0, on success, 231 * - unequal 0, on failure 232 */ 233 INT FDK_DRC_Generator_setDrcProfile(HDRC_COMP drcComp, 234 const DRC_PROFILE profileLine, 235 const DRC_PROFILE profileRF); 236 237 /** 238 * \brief Get DRC profile for line mode. 239 * 240 * \param drcComp Compressor handle. 241 * 242 * \return Current Profile. 243 */ 244 DRC_PROFILE FDK_DRC_Generator_getDrcProfile(const HDRC_COMP drcComp); 245 246 /** 247 * \brief Get DRC profile for RF mode. 248 * 249 * \param drcComp Compressor handle. 250 * 251 * \return Current Profile. 252 */ 253 DRC_PROFILE FDK_DRC_Generator_getCompProfile(const HDRC_COMP drcComp); 254 255 #endif /* METADATA_COMPRESSOR_H */ 256
