1 /* ----------------------------------------------------------------------------- 2 Software License for The Fraunhofer FDK AAC Codec Library for Android 3 4 © Copyright 1995 - 2019 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 /************************* MPEG-D DRC decoder library ************************** 96 97 Author(s): 98 99 Description: 100 101 *******************************************************************************/ 102 103 #ifndef DRCDEC_GAINDECODER_H 104 #define DRCDEC_GAINDECODER_H 105 106 #include "drcDecoder.h" 107 108 /* Definitions common to gainDecoder submodule */ 109 110 #define NUM_LNB_FRAMES \ 111 5 /* previous frame + this frame + one frame for DM_REGULAR_DELAY + (maximum \ 112 delaySamples)/frameSize */ 113 114 /* QMF64 */ 115 #define SUBBAND_NUM_BANDS_QMF64 64 116 #define SUBBAND_DOWNSAMPLING_FACTOR_QMF64 64 117 #define SUBBAND_ANALYSIS_DELAY_QMF64 320 118 119 /* QMF71 (according to ISO/IEC 23003-1:2007) */ 120 #define SUBBAND_NUM_BANDS_QMF71 71 121 #define SUBBAND_DOWNSAMPLING_FACTOR_QMF71 64 122 #define SUBBAND_ANALYSIS_DELAY_QMF71 320 + 384 123 124 /* STFT256 (according to ISO/IEC 23008-3:2015/AMD3) */ 125 #define SUBBAND_NUM_BANDS_STFT256 256 126 #define SUBBAND_DOWNSAMPLING_FACTOR_STFT256 256 127 #define SUBBAND_ANALYSIS_DELAY_STFT256 256 128 129 typedef enum { 130 GAIN_DEC_DRC1, 131 GAIN_DEC_DRC1_DRC2, 132 GAIN_DEC_DRC2, 133 GAIN_DEC_DRC3, 134 GAIN_DEC_DRC2_DRC3 135 } GAIN_DEC_LOCATION; 136 137 typedef enum { GAIN_DEC_FRAME_SIZE, GAIN_DEC_SAMPLE_RATE } GAIN_DEC_PARAM; 138 139 typedef struct { 140 FIXP_DBL gainLin; /* e = 7 */ 141 SHORT time; 142 } NODE_LIN; 143 144 typedef struct { 145 GAIN_INTERPOLATION_TYPE gainInterpolationType; 146 int nNodes[NUM_LNB_FRAMES]; /* number of nodes, saturated to 16 */ 147 NODE_LIN linearNode[NUM_LNB_FRAMES][16]; 148 } LINEAR_NODE_BUFFER; 149 150 typedef struct { 151 int lnbPointer; 152 LINEAR_NODE_BUFFER linearNodeBuffer[12]; 153 LINEAR_NODE_BUFFER dummyLnb; 154 FIXP_DBL channelGain[8][NUM_LNB_FRAMES]; /* e = 8 */ 155 } DRC_GAIN_BUFFERS; 156 157 typedef struct { 158 int activeDrcOffset; 159 DRC_INSTRUCTIONS_UNI_DRC* pInst; 160 DRC_COEFFICIENTS_UNI_DRC* pCoef; 161 162 DUCKING_MODIFICATION duckingModificationForChannelGroup[8]; 163 SCHAR channelGroupForChannel[8]; 164 165 UCHAR bandCountForChannelGroup[8]; 166 UCHAR gainElementForGroup[8]; 167 UCHAR channelGroupIsParametricDrc[8]; 168 UCHAR gainElementCount; /* number of different DRC gains inluding all DRC 169 bands */ 170 int lnbIndexForChannel[8][NUM_LNB_FRAMES]; 171 int subbandGainsReady; 172 } ACTIVE_DRC; 173 174 typedef struct { 175 int deltaTminDefault; 176 INT frameSize; 177 FIXP_DBL loudnessNormalisationGainDb; 178 DELAY_MODE delayMode; 179 180 int nActiveDrcs; 181 ACTIVE_DRC activeDrc[MAX_ACTIVE_DRCS]; 182 int multiBandActiveDrcIndex; 183 int channelGainActiveDrcIndex; 184 FIXP_DBL channelGain[8]; /* e = 8 */ 185 186 DRC_GAIN_BUFFERS drcGainBuffers; 187 FIXP_DBL subbandGains[12][4 * 1024 / 256]; 188 FIXP_DBL dummySubbandGains[4 * 1024 / 256]; 189 190 int status; 191 int timeDomainSupported; 192 SUBBAND_DOMAIN_MODE subbandDomainSupported; 193 } DRC_GAIN_DECODER, *HANDLE_DRC_GAIN_DECODER; 194 195 /* init functions */ 196 DRC_ERROR 197 drcDec_GainDecoder_Open(HANDLE_DRC_GAIN_DECODER* phGainDec); 198 199 DRC_ERROR 200 drcDec_GainDecoder_Init(HANDLE_DRC_GAIN_DECODER hGainDec); 201 202 DRC_ERROR 203 drcDec_GainDecoder_SetParam(HANDLE_DRC_GAIN_DECODER hGainDec, 204 const GAIN_DEC_PARAM paramType, 205 const int paramValue); 206 207 DRC_ERROR 208 drcDec_GainDecoder_SetCodecDependentParameters( 209 HANDLE_DRC_GAIN_DECODER hGainDec, const DELAY_MODE delayMode, 210 const int timeDomainSupported, 211 const SUBBAND_DOMAIN_MODE subbandDomainSupported); 212 213 DRC_ERROR 214 drcDec_GainDecoder_Config(HANDLE_DRC_GAIN_DECODER hGainDec, 215 HANDLE_UNI_DRC_CONFIG hUniDrcConfig, 216 const UCHAR numSelectedDrcSets, 217 const SCHAR* selectedDrcSetIds, 218 const UCHAR* selectedDownmixIds); 219 220 /* close functions */ 221 DRC_ERROR 222 drcDec_GainDecoder_Close(HANDLE_DRC_GAIN_DECODER* phGainDec); 223 224 /* process functions */ 225 226 /* call drcDec_GainDecoder_Preprocess first */ 227 DRC_ERROR 228 drcDec_GainDecoder_Preprocess(HANDLE_DRC_GAIN_DECODER hGainDec, 229 HANDLE_UNI_DRC_GAIN hUniDrcGain, 230 const FIXP_DBL loudnessNormalizationGainDb, 231 const FIXP_SGL boost, const FIXP_SGL compress); 232 233 /* Then call one of drcDec_GainDecoder_ProcessTimeDomain or 234 * drcDec_GainDecoder_ProcessSubbandDomain */ 235 DRC_ERROR 236 drcDec_GainDecoder_ProcessTimeDomain( 237 HANDLE_DRC_GAIN_DECODER hGainDec, const int delaySamples, 238 const GAIN_DEC_LOCATION drcLocation, const int channelOffset, 239 const int drcChannelOffset, const int numChannelsProcessed, 240 const int timeDataChannelOffset, FIXP_DBL* audioIOBuffer); 241 242 DRC_ERROR 243 drcDec_GainDecoder_ProcessSubbandDomain( 244 HANDLE_DRC_GAIN_DECODER hGainDec, const int delaySamples, 245 GAIN_DEC_LOCATION drcLocation, const int channelOffset, 246 const int drcChannelOffset, const int numChannelsProcessed, 247 const int processSingleTimeslot, FIXP_DBL* audioIOBufferReal[], 248 FIXP_DBL* audioIOBufferImag[]); 249 250 DRC_ERROR 251 drcDec_GainDecoder_Conceal(HANDLE_DRC_GAIN_DECODER hGainDec, 252 HANDLE_UNI_DRC_CONFIG hUniDrcConfig, 253 HANDLE_UNI_DRC_GAIN hUniDrcGain); 254 255 DRC_ERROR 256 drcDec_GainDecoder_SetLoudnessNormalizationGainDb( 257 HANDLE_DRC_GAIN_DECODER hGainDec, FIXP_DBL loudnessNormalizationGainDb); 258 259 int drcDec_GainDecoder_GetFrameSize(HANDLE_DRC_GAIN_DECODER hGainDec); 260 261 int drcDec_GainDecoder_GetDeltaTminDefault(HANDLE_DRC_GAIN_DECODER hGainDec); 262 263 void drcDec_GainDecoder_SetChannelGains(HANDLE_DRC_GAIN_DECODER hGainDec, 264 const int numChannels, 265 const int frameSize, 266 const FIXP_DBL* channelGainDb, 267 const int audioBufferChannelOffset, 268 FIXP_DBL* audioBuffer); 269 270 #endif 271