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 /******************************** 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[(6)]; 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 staticBits; /* Bits per frame consumed by transport layers. */ 147 QCDATA_BR_MODE bitrateMode; 148 INT meanPe; 149 INT chBitrate; 150 INT invQuant; 151 INT maxIterations; /* Maximum number of allowed iterations before FDKaacEnc_crashRecovery() is applied. */ 152 FIXP_DBL maxBitFac; 153 INT bitrate; 154 INT nSubFrames; /* helper variable */ 155 INT minBits; /* minimal number of bits in one frame*/ 156 157 PADDING padding; 158 }; 159 160 typedef struct 161 { 162 FIXP_DBL mdctSpectrum[(1024)]; 163 164 SHORT quantSpec[(1024)]; 165 166 UINT maxValueInSfb[MAX_GROUPED_SFB]; 167 INT scf[MAX_GROUPED_SFB]; 168 INT globalGain; 169 SECTION_DATA sectionData; 170 171 FIXP_DBL sfbFormFactorLdData[MAX_GROUPED_SFB]; 172 173 FIXP_DBL sfbThresholdLdData[MAX_GROUPED_SFB]; 174 FIXP_DBL sfbMinSnrLdData[MAX_GROUPED_SFB]; 175 FIXP_DBL sfbEnergyLdData[MAX_GROUPED_SFB]; 176 FIXP_DBL sfbEnergy[MAX_GROUPED_SFB]; 177 FIXP_DBL sfbWeightedEnergyLdData[MAX_GROUPED_SFB]; 178 179 FIXP_DBL sfbEnFacLd[MAX_GROUPED_SFB]; 180 181 FIXP_DBL sfbSpreadEnergy[MAX_GROUPED_SFB]; 182 183 } QC_OUT_CHANNEL; 184 185 186 typedef struct 187 { 188 EXT_PAYLOAD_TYPE type; /* type of the extension payload */ 189 INT nPayloadBits; /* size of the payload */ 190 UCHAR *pPayload; /* pointer to payload */ 191 192 } QC_OUT_EXTENSION; 193 194 195 typedef struct 196 { 197 INT staticBitsUsed; /* for verification purposes */ 198 INT dynBitsUsed; /* for verification purposes */ 199 200 INT extBitsUsed; /* bit consumption of extended fill elements */ 201 INT nExtensions; /* number of extension payloads for this element */ 202 QC_OUT_EXTENSION extension[(1)]; /* reffering extension payload */ 203 204 INT grantedDynBits; 205 206 INT grantedPe; 207 INT grantedPeCorr; 208 209 PE_DATA peData; 210 211 QC_OUT_CHANNEL *qcOutChannel[(2)]; 212 213 214 } QC_OUT_ELEMENT; 215 216 typedef struct 217 { 218 QC_OUT_ELEMENT *qcElement[(6)]; 219 QC_OUT_CHANNEL *pQcOutChannels[(6)]; 220 QC_OUT_EXTENSION extension[(2+2)]; /* global extension payload */ 221 INT nExtensions; /* number of extension payloads for this AU */ 222 INT maxDynBits; /* maximal allowed dynamic bits in frame */ 223 INT grantedDynBits; /* granted dynamic bits in frame */ 224 INT totFillBits; /* fill bits */ 225 INT elementExtBits; /* element associated extension payload bits, e.g. sbr, drc ... */ 226 INT globalExtBits; /* frame/au associated extension payload bits (anc data ...) */ 227 INT staticBits; /* aac side info bits */ 228 229 INT totalNoRedPe; 230 INT totalGrantedPeCorr; 231 232 INT usedDynBits; /* number of dynamic bits in use */ 233 INT alignBits; /* AU alignment bits */ 234 INT totalBits; /* sum of static, dyn, sbr, fill, align and dse bits */ 235 236 } QC_OUT; 237 238 typedef struct { 239 INT chBitrateEl; /* channel bitrate in element (totalbitrate*el_relativeBits/el_channels) */ 240 INT maxBitsEl; /* used in crash recovery */ 241 INT bitResLevelEl; /* update bitreservoir level in each call of FDKaacEnc_QCMain */ 242 INT maxBitResBitsEl; /* nEffChannels*6144 - averageBitsInFrame */ 243 FIXP_DBL relativeBitsEl; /* Bits relative to total Bits*/ 244 } ELEMENT_BITS; 245 246 typedef struct 247 { 248 /* this is basically struct QC_INIT */ 249 250 INT globHdrBits; 251 INT maxBitsPerFrame; /* maximal allowed bits per frame, 6144*nChannelsEff */ 252 INT minBitsPerFrame; /* minimal allowd bits per fram, superframing - DRM */ 253 INT nElements; 254 QCDATA_BR_MODE bitrateMode; 255 INT bitDistributenMode; /* 0: full bitreservoir, 1: reduced bitreservoir, 2: disabled bitreservoir */ 256 INT bitResTot; 257 INT bitResTotMax; 258 INT maxIterations; /* Maximum number of allowed iterations before FDKaacEnc_crashRecovery() is applied. */ 259 INT invQuant; 260 261 FIXP_DBL vbrQualFactor; 262 FIXP_DBL maxBitFac; 263 264 PADDING padding; 265 266 ELEMENT_BITS *elementBits[(6)]; 267 BITCNTR_STATE *hBitCounter; 268 ADJ_THR_STATE *hAdjThr; 269 270 } QC_STATE; 271 272 #endif /* _QC_DATA_H */ 273 274 275 276 277
