1 2 /* ----------------------------------------------------------------------------------------------------------- 3 Software License for The Fraunhofer FDK AAC Codec Library for Android 4 5 Copyright 1995 - 2015 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 Audio Encoder ************************** 85 86 Initial author: M. Werner 87 contents/description: Quantizing & coding data 88 89 ******************************************************************************/ 90 91 #ifndef _QC_DATA_H 92 #define _QC_DATA_H 93 94 95 #include "psy_const.h" 96 #include "dyn_bits.h" 97 #include "adj_thr_data.h" 98 #include "line_pe.h" 99 #include "FDK_audio.h" 100 #include "interface.h" 101 102 103 typedef enum { 104 QCDATA_BR_MODE_INVALID = -1, 105 QCDATA_BR_MODE_CBR = 0, 106 QCDATA_BR_MODE_VBR_1 = 1, /* 32 kbps/channel */ 107 QCDATA_BR_MODE_VBR_2 = 2, /* 40 kbps/channel */ 108 QCDATA_BR_MODE_VBR_3 = 3, /* 48 kbps/channel */ 109 QCDATA_BR_MODE_VBR_4 = 4, /* 64 kbps/channel */ 110 QCDATA_BR_MODE_VBR_5 = 5, /* 96 kbps/channel */ 111 QCDATA_BR_MODE_FF = 6, /* Fixed frame mode. */ 112 QCDATA_BR_MODE_SFR = 7 /* Superframe mode. */ 113 114 115 } QCDATA_BR_MODE; 116 117 typedef struct { 118 MP4_ELEMENT_ID elType; 119 INT instanceTag; 120 INT nChannelsInEl; 121 INT ChannelIndex[2]; 122 FIXP_DBL relativeBits; 123 } ELEMENT_INFO; 124 125 typedef struct { 126 CHANNEL_MODE encMode; 127 INT nChannels; 128 INT nChannelsEff; 129 INT nElements; 130 ELEMENT_INFO elInfo[(8)]; 131 } CHANNEL_MAPPING; 132 133 typedef struct { 134 INT paddingRest; 135 } PADDING; 136 137 138 /* Quantizing & coding stage */ 139 140 struct QC_INIT{ 141 CHANNEL_MAPPING* channelMapping; 142 INT sceCpe; /* not used yet */ 143 INT maxBits; /* maximum number of bits in reservoir */ 144 INT averageBits; /* average number of bits we should use */ 145 INT bitRes; 146 INT sampleRate; /* output sample rate */ 147 INT advancedBitsToPe; /* if set, calc bits2PE factor depending on samplerate */ 148 INT staticBits; /* Bits per frame consumed by transport layers. */ 149 QCDATA_BR_MODE bitrateMode; 150 INT meanPe; 151 INT chBitrate; 152 INT invQuant; 153 INT maxIterations; /* Maximum number of allowed iterations before FDKaacEnc_crashRecovery() is applied. */ 154 FIXP_DBL maxBitFac; 155 INT bitrate; 156 INT nSubFrames; /* helper variable */ 157 INT minBits; /* minimal number of bits in one frame*/ 158 159 PADDING padding; 160 }; 161 162 typedef struct 163 { 164 FIXP_DBL mdctSpectrum[(1024)]; 165 166 SHORT quantSpec[(1024)]; 167 168 UINT maxValueInSfb[MAX_GROUPED_SFB]; 169 INT scf[MAX_GROUPED_SFB]; 170 INT globalGain; 171 SECTION_DATA sectionData; 172 173 FIXP_DBL sfbFormFactorLdData[MAX_GROUPED_SFB]; 174 175 FIXP_DBL sfbThresholdLdData[MAX_GROUPED_SFB]; 176 FIXP_DBL sfbMinSnrLdData[MAX_GROUPED_SFB]; 177 FIXP_DBL sfbEnergyLdData[MAX_GROUPED_SFB]; 178 FIXP_DBL sfbEnergy[MAX_GROUPED_SFB]; 179 FIXP_DBL sfbWeightedEnergyLdData[MAX_GROUPED_SFB]; 180 181 FIXP_DBL sfbEnFacLd[MAX_GROUPED_SFB]; 182 183 FIXP_DBL sfbSpreadEnergy[MAX_GROUPED_SFB]; 184 185 } QC_OUT_CHANNEL; 186 187 188 typedef struct 189 { 190 EXT_PAYLOAD_TYPE type; /* type of the extension payload */ 191 INT nPayloadBits; /* size of the payload */ 192 UCHAR *pPayload; /* pointer to payload */ 193 194 } QC_OUT_EXTENSION; 195 196 197 typedef struct 198 { 199 INT staticBitsUsed; /* for verification purposes */ 200 INT dynBitsUsed; /* for verification purposes */ 201 202 INT extBitsUsed; /* bit consumption of extended fill elements */ 203 INT nExtensions; /* number of extension payloads for this element */ 204 QC_OUT_EXTENSION extension[(1)]; /* reffering extension payload */ 205 206 INT grantedDynBits; 207 208 INT grantedPe; 209 INT grantedPeCorr; 210 211 PE_DATA peData; 212 213 QC_OUT_CHANNEL *qcOutChannel[(2)]; 214 215 216 } QC_OUT_ELEMENT; 217 218 typedef struct 219 { 220 QC_OUT_ELEMENT *qcElement[(8)]; 221 QC_OUT_CHANNEL *pQcOutChannels[(8)]; 222 QC_OUT_EXTENSION extension[(2+2)]; /* global extension payload */ 223 INT nExtensions; /* number of extension payloads for this AU */ 224 INT maxDynBits; /* maximal allowed dynamic bits in frame */ 225 INT grantedDynBits; /* granted dynamic bits in frame */ 226 INT totFillBits; /* fill bits */ 227 INT elementExtBits; /* element associated extension payload bits, e.g. sbr, drc ... */ 228 INT globalExtBits; /* frame/au associated extension payload bits (anc data ...) */ 229 INT staticBits; /* aac side info bits */ 230 231 INT totalNoRedPe; 232 INT totalGrantedPeCorr; 233 234 INT usedDynBits; /* number of dynamic bits in use */ 235 INT alignBits; /* AU alignment bits */ 236 INT totalBits; /* sum of static, dyn, sbr, fill, align and dse bits */ 237 238 } QC_OUT; 239 240 typedef struct { 241 INT chBitrateEl; /* channel bitrate in element (totalbitrate*el_relativeBits/el_channels) */ 242 INT maxBitsEl; /* used in crash recovery */ 243 INT bitResLevelEl; /* update bitreservoir level in each call of FDKaacEnc_QCMain */ 244 INT maxBitResBitsEl; /* nEffChannels*6144 - averageBitsInFrame */ 245 FIXP_DBL relativeBitsEl; /* Bits relative to total Bits*/ 246 } ELEMENT_BITS; 247 248 typedef struct 249 { 250 /* this is basically struct QC_INIT */ 251 252 INT globHdrBits; 253 INT maxBitsPerFrame; /* maximal allowed bits per frame, 6144*nChannelsEff */ 254 INT minBitsPerFrame; /* minimal allowd bits per fram, superframing - DRM */ 255 INT nElements; 256 QCDATA_BR_MODE bitrateMode; 257 INT bitDistributionMode; /* 0: full bitreservoir, 1: reduced bitreservoir, 2: disabled bitreservoir */ 258 INT bitResTot; 259 INT bitResTotMax; 260 INT maxIterations; /* Maximum number of allowed iterations before FDKaacEnc_crashRecovery() is applied. */ 261 INT invQuant; 262 263 FIXP_DBL vbrQualFactor; 264 FIXP_DBL maxBitFac; 265 266 PADDING padding; 267 268 ELEMENT_BITS *elementBits[(8)]; 269 BITCNTR_STATE *hBitCounter; 270 ADJ_THR_STATE *hAdjThr; 271 272 INT dZoneQuantEnable; /* enable dead zone quantizer */ 273 274 } QC_STATE; 275 276 #endif /* _QC_DATA_H */ 277 278 279 280 281
