1 /* ----------------------------------------------------------------------------- 2 Software License for The Fraunhofer FDK AAC Codec Library for Android 3 4 © Copyright 1995 - 2018 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_TYPES_H 104 #define DRCDEC_TYPES_H 105 106 #include "common_fix.h" 107 108 /* Data structures corresponding to static and dynamic DRC/Loudness payload 109 as defined in section 7 of MPEG-D DRC standard, ISO/IEC 23003-4 */ 110 111 /**************/ 112 /* uniDrcGain */ 113 /**************/ 114 115 typedef struct { 116 FIXP_SGL gainDb; /* e = 7 */ 117 SHORT time; 118 } GAIN_NODE; 119 120 /* uniDrcGainExtension() (Table 56) */ 121 typedef struct { 122 UCHAR uniDrcGainExtType[8]; 123 ULONG extBitSize[8 - 1]; 124 } UNI_DRC_GAIN_EXTENSION; 125 126 /* uniDrcGain() (Table 55) */ 127 typedef struct { 128 UCHAR nNodes[12]; /* unsaturated value, i.e. as provided in bitstream */ 129 GAIN_NODE gainNode[12][16]; 130 131 UCHAR uniDrcGainExtPresent; 132 UNI_DRC_GAIN_EXTENSION uniDrcGainExtension; 133 } UNI_DRC_GAIN, *HANDLE_UNI_DRC_GAIN; 134 135 /****************/ 136 /* uniDrcConfig */ 137 /****************/ 138 139 typedef enum { 140 EB_NIGHT = 0x0001, 141 EB_NOISY = 0x0002, 142 EB_LIMITED = 0x0004, 143 EB_LOWLEVEL = 0x0008, 144 EB_DIALOG = 0x0010, 145 EB_GENERAL_COMPR = 0x0020, 146 EB_EXPAND = 0x0040, 147 EB_ARTISTIC = 0x0080, 148 EB_CLIPPING = 0x0100, 149 EB_FADE = 0x0200, 150 EB_DUCK_OTHER = 0x0400, 151 EB_DUCK_SELF = 0x0800 152 } EFFECT_BIT; 153 154 typedef enum { 155 GCP_REGULAR = 0, 156 GCP_FADING = 1, 157 GCP_CLIPPING_DUCKING = 2, 158 GCP_CONSTANT = 3 159 } GAIN_CODING_PROFILE; 160 161 typedef enum { GIT_SPLINE = 0, GIT_LINEAR = 1 } GAIN_INTERPOLATION_TYPE; 162 163 typedef enum { CS_LEFT = 0, CS_RIGHT = 1 } CHARACTERISTIC_SIDE; 164 165 typedef enum { CF_SIGMOID = 0, CF_NODES = 1 } CHARACTERISTIC_FORMAT; 166 167 typedef enum { 168 GF_QMF32 = 0x1, 169 GF_QMFHYBRID39 = 0x2, 170 GF_QMF64 = 0x3, 171 GF_QMFHYBRID71 = 0x4, 172 GF_QMF128 = 0x5, 173 GF_QMFHYBRID135 = 0x6, 174 GF_UNIFORM = 0x7 175 } EQ_SUBBAND_GAIN_FORMAT; 176 177 typedef struct { 178 UCHAR duckingScalingPresent; 179 FIXP_SGL duckingScaling; /* e = 2 */ 180 } DUCKING_MODIFICATION; 181 182 typedef struct { 183 UCHAR targetCharacteristicLeftPresent; 184 UCHAR targetCharacteristicLeftIndex; 185 UCHAR targetCharacteristicRightPresent; 186 UCHAR targetCharacteristicRightIndex; 187 UCHAR gainScalingPresent; 188 FIXP_SGL attenuationScaling; /* e = 2 */ 189 FIXP_SGL amplificationScaling; /* e = 2 */ 190 UCHAR gainOffsetPresent; 191 FIXP_SGL gainOffset; /* e = 4 */ 192 } GAIN_MODIFICATION; 193 194 typedef union { 195 UCHAR crossoverFreqIndex; 196 USHORT startSubBandIndex; 197 } BAND_BORDER; 198 199 typedef struct { 200 UCHAR left; 201 UCHAR right; 202 } CUSTOM_INDEX; 203 204 typedef struct { 205 UCHAR present; 206 UCHAR isCICP; 207 union { 208 UCHAR cicpIndex; 209 CUSTOM_INDEX custom; 210 }; 211 } DRC_CHARACTERISTIC; 212 213 typedef struct { 214 UCHAR gainCodingProfile; 215 UCHAR gainInterpolationType; 216 UCHAR fullFrame; 217 UCHAR timeAlignment; 218 UCHAR timeDeltaMinPresent; 219 USHORT timeDeltaMin; 220 UCHAR bandCount; 221 UCHAR drcBandType; 222 UCHAR gainSequenceIndex[4]; 223 DRC_CHARACTERISTIC drcCharacteristic[4]; 224 BAND_BORDER bandBorder[4]; 225 } GAIN_SET; 226 227 typedef struct { 228 FIXP_SGL gain; /* e = 6 */ 229 FIXP_SGL ioRatio; /* e = 2 */ 230 FIXP_SGL exp; /* e = 5 */ 231 UCHAR flipSign; 232 } CUSTOM_DRC_CHAR_SIGMOID; 233 234 typedef struct { 235 UCHAR characteristicNodeCount; 236 FIXP_SGL nodeLevel[4 + 1]; /* e = 7 */ 237 FIXP_SGL nodeGain[4 + 1]; /* e = 7 */ 238 } CUSTOM_DRC_CHAR_NODES; 239 240 typedef shouldBeUnion { 241 CUSTOM_DRC_CHAR_SIGMOID sigmoid; 242 CUSTOM_DRC_CHAR_NODES nodes; 243 } 244 CUSTOM_DRC_CHAR; 245 246 /* drcCoefficientsUniDrc() (Table 67) */ 247 typedef struct { 248 UCHAR drcLocation; 249 UCHAR drcFrameSizePresent; 250 USHORT drcFrameSize; 251 UCHAR characteristicLeftCount; 252 UCHAR characteristicLeftFormat[16]; 253 CUSTOM_DRC_CHAR customCharacteristicLeft[16]; 254 UCHAR characteristicRightCount; 255 UCHAR characteristicRightFormat[16]; 256 CUSTOM_DRC_CHAR customCharacteristicRight[16]; 257 UCHAR 258 gainSequenceCount; /* unsaturated value, i.e. as provided in bitstream */ 259 UCHAR gainSetCount; /* saturated to 12 */ 260 GAIN_SET gainSet[12]; 261 /* derived data */ 262 UCHAR gainSetIndexForGainSequence[12]; 263 } DRC_COEFFICIENTS_UNI_DRC; 264 265 /* drcInstructionsUniDrc() (Table 72) */ 266 typedef struct { 267 SCHAR drcSetId; 268 UCHAR drcSetComplexityLevel; 269 UCHAR drcLocation; 270 UCHAR drcApplyToDownmix; 271 UCHAR downmixIdCount; 272 UCHAR downmixId[8]; 273 USHORT drcSetEffect; 274 UCHAR limiterPeakTargetPresent; 275 FIXP_SGL limiterPeakTarget; /* e = 5 */ 276 UCHAR drcSetTargetLoudnessPresent; 277 SCHAR drcSetTargetLoudnessValueUpper; 278 SCHAR drcSetTargetLoudnessValueLower; 279 UCHAR dependsOnDrcSetPresent; 280 union { 281 SCHAR dependsOnDrcSet; 282 UCHAR noIndependentUse; 283 }; 284 UCHAR requiresEq; 285 shouldBeUnion { 286 GAIN_MODIFICATION gainModificationForChannelGroup[8][4]; 287 DUCKING_MODIFICATION duckingModificationForChannel[8]; 288 }; 289 SCHAR gainSetIndex[8]; 290 291 /* derived data */ 292 UCHAR drcChannelCount; 293 UCHAR nDrcChannelGroups; 294 SCHAR gainSetIndexForChannelGroup[8]; 295 } DRC_INSTRUCTIONS_UNI_DRC; 296 297 /* channelLayout() (Table 62) */ 298 typedef struct { 299 UCHAR baseChannelCount; 300 UCHAR layoutSignalingPresent; 301 UCHAR definedLayout; 302 UCHAR speakerPosition[8]; 303 } CHANNEL_LAYOUT; 304 305 /* downmixInstructions() (Table 63) */ 306 typedef struct { 307 UCHAR downmixId; 308 UCHAR targetChannelCount; 309 UCHAR targetLayout; 310 UCHAR downmixCoefficientsPresent; 311 UCHAR bsDownmixOffset; 312 FIXP_DBL downmixCoefficient[8 * 8]; /* e = 2 */ 313 } DOWNMIX_INSTRUCTIONS; 314 315 typedef struct { 316 UCHAR uniDrcConfigExtType[8]; 317 ULONG extBitSize[8 - 1]; 318 } UNI_DRC_CONFIG_EXTENSION; 319 320 /* uniDrcConfig() (Table 57) */ 321 typedef struct { 322 UCHAR sampleRatePresent; 323 ULONG sampleRate; 324 UCHAR downmixInstructionsCountV0; 325 UCHAR downmixInstructionsCountV1; 326 UCHAR downmixInstructionsCount; /* saturated to 6 */ 327 UCHAR drcCoefficientsUniDrcCountV0; 328 UCHAR drcCoefficientsUniDrcCountV1; 329 UCHAR drcCoefficientsUniDrcCount; /* saturated to 2 */ 330 UCHAR drcInstructionsUniDrcCountV0; 331 UCHAR drcInstructionsUniDrcCountV1; 332 UCHAR drcInstructionsUniDrcCount; /* saturated to (12 + 1 + 6) */ 333 CHANNEL_LAYOUT channelLayout; 334 DOWNMIX_INSTRUCTIONS downmixInstructions[6]; 335 DRC_COEFFICIENTS_UNI_DRC drcCoefficientsUniDrc[2]; 336 DRC_INSTRUCTIONS_UNI_DRC drcInstructionsUniDrc[(12 + 1 + 6)]; 337 UCHAR uniDrcConfigExtPresent; 338 UNI_DRC_CONFIG_EXTENSION uniDrcConfigExt; 339 340 /* derived data */ 341 UCHAR drcInstructionsCountInclVirtual; 342 UCHAR diff; 343 } UNI_DRC_CONFIG, *HANDLE_UNI_DRC_CONFIG; 344 345 /*******************/ 346 /* loudnessInfoSet */ 347 /*******************/ 348 349 typedef enum { 350 MD_UNKNOWN_OTHER = 0, 351 MD_PROGRAM_LOUDNESS = 1, 352 MD_ANCHOR_LOUDNESS = 2, 353 MD_MAX_OF_LOUDNESS_RANGE = 3, 354 MD_MOMENTARY_LOUDNESS_MAX = 4, 355 MD_SHORT_TERM_LOUDNESS_MAX = 5, 356 MD_LOUDNESS_RANGE = 6, 357 MD_MIXING_LEVEL = 7, 358 MD_ROOM_TYPE = 8, 359 MD_SHORT_TERM_LOUDNESS = 9 360 } METHOD_DEFINITION; 361 362 typedef enum { 363 MS_UNKNOWN_OTHER = 0, 364 MS_EBU_R_128 = 1, 365 MS_BS_1770_4 = 2, 366 MS_BS_1770_4_PRE_PROCESSING = 3, 367 MS_USER = 4, 368 MS_EXPERT_PANEL = 5, 369 MS_BS_1771_1 = 6, 370 MS_RESERVED_A = 7, 371 MS_RESERVED_B = 8, 372 MS_RESERVED_C = 9, 373 MS_RESERVED_D = 10, 374 MS_RESERVED_E = 11 375 } MEASUREMENT_SYSTEM; 376 377 typedef enum { 378 R_UKNOWN = 0, 379 R_UNVERIFIED = 1, 380 R_CEILING = 2, 381 R_ACCURATE = 3 382 } RELIABILITY; 383 384 typedef struct { 385 UCHAR methodDefinition; 386 FIXP_DBL methodValue; /* e = 7 for all methodDefinitions */ 387 UCHAR measurementSystem; 388 UCHAR reliability; 389 } LOUDNESS_MEASUREMENT; 390 391 /* loudnessInfo() (Table 59) */ 392 typedef struct { 393 SCHAR drcSetId; 394 UCHAR eqSetId; 395 UCHAR downmixId; 396 UCHAR samplePeakLevelPresent; 397 FIXP_DBL samplePeakLevel; /* e = 7 */ 398 UCHAR truePeakLevelPresent; 399 FIXP_DBL truePeakLevel; /* e = 7 */ 400 UCHAR truePeakLevelMeasurementSystem; 401 UCHAR truePeakLevelReliability; 402 UCHAR measurementCount; /* saturated to 8 */ 403 LOUDNESS_MEASUREMENT loudnessMeasurement[8]; 404 } LOUDNESS_INFO; 405 406 /* loudnessInfoSetExtension() (Table 61) */ 407 typedef struct { 408 UCHAR loudnessInfoSetExtType[8]; 409 ULONG extBitSize[8 - 1]; 410 } LOUDNESS_INFO_SET_EXTENSION; 411 412 /* loudnessInfoSet() (Table 58) */ 413 typedef struct { 414 UCHAR loudnessInfoAlbumCountV0; 415 UCHAR loudnessInfoAlbumCountV1; 416 UCHAR loudnessInfoAlbumCount; /* saturated to 12 */ 417 UCHAR loudnessInfoCountV0; 418 UCHAR loudnessInfoCountV1; 419 UCHAR loudnessInfoCount; /* saturated to 12 */ 420 LOUDNESS_INFO loudnessInfoAlbum[12]; 421 LOUDNESS_INFO loudnessInfo[12]; 422 UCHAR loudnessInfoSetExtPresent; 423 LOUDNESS_INFO_SET_EXTENSION loudnessInfoSetExt; 424 /* derived data */ 425 UCHAR diff; 426 } LOUDNESS_INFO_SET, *HANDLE_LOUDNESS_INFO_SET; 427 428 #endif 429