| /* ----------------------------------------------------------------------------- |
| Software License for The Fraunhofer FDK AAC Codec Library for Android |
| |
| © Copyright 1995 - 2018 Fraunhofer-Gesellschaft zur Förderung der angewandten |
| Forschung e.V. All rights reserved. |
| |
| 1. INTRODUCTION |
| The Fraunhofer FDK AAC Codec Library for Android ("FDK AAC Codec") is software |
| that implements the MPEG Advanced Audio Coding ("AAC") encoding and decoding |
| scheme for digital audio. This FDK AAC Codec software is intended to be used on |
| a wide variety of Android devices. |
| |
| AAC's HE-AAC and HE-AAC v2 versions are regarded as today's most efficient |
| general perceptual audio codecs. AAC-ELD is considered the best-performing |
| full-bandwidth communications codec by independent studies and is widely |
| deployed. AAC has been standardized by ISO and IEC as part of the MPEG |
| specifications. |
| |
| Patent licenses for necessary patent claims for the FDK AAC Codec (including |
| those of Fraunhofer) may be obtained through Via Licensing |
| (www.vialicensing.com) or through the respective patent owners individually for |
| the purpose of encoding or decoding bit streams in products that are compliant |
| with the ISO/IEC MPEG audio standards. Please note that most manufacturers of |
| Android devices already license these patent claims through Via Licensing or |
| directly from the patent owners, and therefore FDK AAC Codec software may |
| already be covered under those patent licenses when it is used for those |
| licensed purposes only. |
| |
| Commercially-licensed AAC software libraries, including floating-point versions |
| with enhanced sound quality, are also available from Fraunhofer. Users are |
| encouraged to check the Fraunhofer website for additional applications |
| information and documentation. |
| |
| 2. COPYRIGHT LICENSE |
| |
| Redistribution and use in source and binary forms, with or without modification, |
| are permitted without payment of copyright license fees provided that you |
| satisfy the following conditions: |
| |
| You must retain the complete text of this software license in redistributions of |
| the FDK AAC Codec or your modifications thereto in source code form. |
| |
| You must retain the complete text of this software license in the documentation |
| and/or other materials provided with redistributions of the FDK AAC Codec or |
| your modifications thereto in binary form. You must make available free of |
| charge copies of the complete source code of the FDK AAC Codec and your |
| modifications thereto to recipients of copies in binary form. |
| |
| The name of Fraunhofer may not be used to endorse or promote products derived |
| from this library without prior written permission. |
| |
| You may not charge copyright license fees for anyone to use, copy or distribute |
| the FDK AAC Codec software or your modifications thereto. |
| |
| Your modified versions of the FDK AAC Codec must carry prominent notices stating |
| that you changed the software and the date of any change. For modified versions |
| of the FDK AAC Codec, the term "Fraunhofer FDK AAC Codec Library for Android" |
| must be replaced by the term "Third-Party Modified Version of the Fraunhofer FDK |
| AAC Codec Library for Android." |
| |
| 3. NO PATENT LICENSE |
| |
| NO EXPRESS OR IMPLIED LICENSES TO ANY PATENT CLAIMS, including without |
| limitation the patents of Fraunhofer, ARE GRANTED BY THIS SOFTWARE LICENSE. |
| Fraunhofer provides no warranty of patent non-infringement with respect to this |
| software. |
| |
| You may use this FDK AAC Codec software or modifications thereto only for |
| purposes that are authorized by appropriate patent licenses. |
| |
| 4. DISCLAIMER |
| |
| This FDK AAC Codec software is provided by Fraunhofer on behalf of the copyright |
| holders and contributors "AS IS" and WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, |
| including but not limited to the implied warranties of merchantability and |
| fitness for a particular purpose. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR |
| CONTRIBUTORS BE LIABLE for any direct, indirect, incidental, special, exemplary, |
| or consequential damages, including but not limited to procurement of substitute |
| goods or services; loss of use, data, or profits, or business interruption, |
| however caused and on any theory of liability, whether in contract, strict |
| liability, or tort (including negligence), arising in any way out of the use of |
| this software, even if advised of the possibility of such damage. |
| |
| 5. CONTACT INFORMATION |
| |
| Fraunhofer Institute for Integrated Circuits IIS |
| Attention: Audio and Multimedia Departments - FDK AAC LL |
| Am Wolfsmantel 33 |
| 91058 Erlangen, Germany |
| |
| www.iis.fraunhofer.de/amm |
| amm-info@iis.fraunhofer.de |
| ----------------------------------------------------------------------------- */ |
| |
| /**************************** AAC decoder library ****************************** |
| |
| Author(s): Josef Hoepfl |
| |
| Description: Definition of constant tables |
| |
| *******************************************************************************/ |
| |
| #ifndef AAC_ROM_H |
| #define AAC_ROM_H |
| |
| #include "common_fix.h" |
| #include "FDK_audio.h" |
| #include "aacdec_hcr_types.h" |
| #include "aacdec_hcrs.h" |
| |
| #define PCM_DEC FIXP_DBL |
| #define MAXVAL_PCM_DEC MAXVAL_DBL |
| #define MINVAL_PCM_DEC MINVAL_DBL |
| #define FIXP_DBL2PCM_DEC(x) (x) |
| #define PCM_DEC2FIXP_DBL(x) (x) |
| #define PCM_DEC_BITS DFRACT_BITS |
| #define PCM_DEC2FX_PCM(x) FX_DBL2FX_PCM(x) |
| #define FX_PCM2PCM_DEC(x) FX_PCM2FX_DBL(x) |
| |
| #define AACDEC_MAX_CH_CONF 14 |
| #define AACDEC_CH_ELEMENTS_TAB_SIZE 7 /*!< Size of element tables */ |
| |
| #define AAC_NF_NO_RANDOM_VAL \ |
| 512 /*!< Size of random number array for noise floor */ |
| |
| #define INV_QUANT_TABLESIZE 256 |
| |
| extern const FIXP_DBL InverseQuantTable[INV_QUANT_TABLESIZE + 1]; |
| extern const FIXP_DBL MantissaTable[4][14]; |
| extern const SCHAR ExponentTable[4][14]; |
| |
| #define NUM_LD_COEF_512 1536 |
| #define NUM_LD_COEF_480 1440 |
| /* Window table partition exponents. */ |
| #define WTS0 (1) |
| #define WTS1 (0) |
| #define WTS2 (-2) |
| extern const FIXP_WTB LowDelaySynthesis512[1536]; |
| extern const FIXP_WTB LowDelaySynthesis480[1440]; |
| extern const FIXP_WTB LowDelaySynthesis256[768]; |
| extern const FIXP_WTB LowDelaySynthesis240[720]; |
| extern const FIXP_WTB LowDelaySynthesis160[480]; |
| extern const FIXP_WTB LowDelaySynthesis128[384]; |
| extern const FIXP_WTB LowDelaySynthesis120[360]; |
| |
| typedef struct { |
| const SHORT *sfbOffsetLong; |
| const SHORT *sfbOffsetShort; |
| UCHAR numberOfSfbLong; |
| UCHAR numberOfSfbShort; |
| } SFB_INFO; |
| |
| extern const SFB_INFO sfbOffsetTables[5][16]; |
| |
| /* Huffman tables */ |
| enum { HuffmanBits = 2, HuffmanEntries = (1 << HuffmanBits) }; |
| |
| typedef struct { |
| const USHORT (*CodeBook)[HuffmanEntries]; |
| UCHAR Dimension; |
| UCHAR numBits; |
| UCHAR Offset; |
| } CodeBookDescription; |
| |
| extern const CodeBookDescription AACcodeBookDescriptionTable[13]; |
| extern const CodeBookDescription AACcodeBookDescriptionSCL; |
| |
| extern const STATEFUNC aStateConstant2State[]; |
| |
| extern const SCHAR aCodebook2StartInt[]; |
| |
| extern const UCHAR aMinOfCbPair[]; |
| extern const UCHAR aMaxOfCbPair[]; |
| |
| extern const UCHAR aMaxCwLen[]; |
| extern const UCHAR aDimCb[]; |
| extern const UCHAR aDimCbShift[]; |
| extern const UCHAR aSignCb[]; |
| extern const UCHAR aCbPriority[]; |
| |
| extern const UINT *aHuffTable[]; |
| extern const SCHAR *aQuantTable[]; |
| |
| extern const USHORT aLargestAbsoluteValue[]; |
| |
| extern const UINT aHuffTreeRvlcEscape[]; |
| extern const UINT aHuffTreeRvlCodewds[]; |
| |
| extern const UCHAR tns_max_bands_tbl[13][2]; |
| |
| extern const UCHAR tns_max_bands_tbl_480[13]; |
| extern const UCHAR tns_max_bands_tbl_512[13]; |
| |
| #define FIXP_TCC FIXP_DBL |
| |
| extern const FIXP_TCC FDKaacDec_tnsCoeff3[8]; |
| extern const FIXP_TCC FDKaacDec_tnsCoeff4[16]; |
| |
| extern const UCHAR FDKaacDec_tnsCoeff3_gain_ld[]; |
| extern const UCHAR FDKaacDec_tnsCoeff4_gain_ld[]; |
| |
| extern const USHORT AacDec_randomSign[AAC_NF_NO_RANDOM_VAL / 16]; |
| |
| extern const FIXP_DBL pow2_div24minus1[47]; |
| extern const int offsetTab[2][16]; |
| |
| /* Channel mapping indices for time domain I/O. |
| The first dimension is the channel configuration index. */ |
| extern const UCHAR channelMappingTablePassthrough[15][8]; |
| extern const UCHAR channelMappingTableWAV[15][8]; |
| |
| /* Lookup tables for elements in ER bitstream */ |
| extern const MP4_ELEMENT_ID elementsTab[AACDEC_MAX_CH_CONF] |
| [AACDEC_CH_ELEMENTS_TAB_SIZE]; |
| |
| #define SF_FNA_COEFFS \ |
| 1 /* Compile-time prescaler for MDST-filter coefficients. */ |
| /* SF_FNA_COEFFS > 0 should only be considered for FIXP_DBL-coefficients */ |
| /* (i.e. if CPLX_PRED_FILTER_16BIT is not defined). */ |
| /* With FIXP_DBL loss of precision is possible for SF_FNA_COEFFS > 11. */ |
| |
| #ifdef CPLX_PRED_FILTER_16BIT |
| #define FIXP_FILT FIXP_SGL |
| #define FILT(a) ((FL2FXCONST_SGL(a)) >> SF_FNA_COEFFS) |
| #else |
| #define FIXP_FILT FIXP_DBL |
| #define FILT(a) ((FL2FXCONST_DBL(a)) >> SF_FNA_COEFFS) |
| #endif |
| |
| extern const FIXP_FILT mdst_filt_coef_curr[20][3]; /* MDST-filter coefficient |
| tables used for current |
| window */ |
| extern const FIXP_FILT mdst_filt_coef_prev[6][4]; /* MDST-filter coefficient |
| tables used for previous |
| window */ |
| |
| #endif /* #ifndef AAC_ROM_H */ |