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Diffstat (limited to 'fdk-aac/libAACdec/src/aac_rom.h')
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diff --git a/fdk-aac/libAACdec/src/aac_rom.h b/fdk-aac/libAACdec/src/aac_rom.h new file mode 100644 index 0000000..ffaf951 --- /dev/null +++ b/fdk-aac/libAACdec/src/aac_rom.h @@ -0,0 +1,237 @@ +/* ----------------------------------------------------------------------------- +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 */ |