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      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 /************************* 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