Home | History | Annotate | Download | only in src
      1 
      2 /* -----------------------------------------------------------------------------------------------------------
      3 Software License for The Fraunhofer FDK AAC Codec Library for Android
      4 
      5  Copyright  1995 - 2013 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 /*!
     85 \file
     86 \brief Declaration of constant tables
     87 
     88 */
     89 #ifndef __rom_H
     90 #define __rom_H
     91 
     92 #include "sbrdecoder.h"
     93 #include "env_extr.h"
     94 #include "qmf.h"
     95 
     96 #define INV_INT_TABLE_SIZE      49
     97 #define SBR_NF_NO_RANDOM_VAL  512   /*!< Size of random number array for noise floor */
     98 
     99 /*
    100   Frequency scales
    101 */
    102 extern const UCHAR FDK_sbrDecoder_sbr_start_freq_16[16];
    103 extern const UCHAR FDK_sbrDecoder_sbr_start_freq_22[16];
    104 extern const UCHAR FDK_sbrDecoder_sbr_start_freq_24[16];
    105 extern const UCHAR FDK_sbrDecoder_sbr_start_freq_32[16];
    106 extern const UCHAR FDK_sbrDecoder_sbr_start_freq_40[16];
    107 extern const UCHAR FDK_sbrDecoder_sbr_start_freq_44[16];
    108 extern const UCHAR FDK_sbrDecoder_sbr_start_freq_48[16];
    109 extern const UCHAR FDK_sbrDecoder_sbr_start_freq_64[16];
    110 extern const UCHAR FDK_sbrDecoder_sbr_start_freq_88[16];
    111 
    112 /*
    113   Low-Power-Profile Transposer
    114 */
    115 #define NUM_WHFACTOR_TABLE_ENTRIES  9
    116 extern const USHORT FDK_sbrDecoder_sbr_whFactorsIndex[NUM_WHFACTOR_TABLE_ENTRIES];
    117 extern const FIXP_DBL FDK_sbrDecoder_sbr_whFactorsTable[NUM_WHFACTOR_TABLE_ENTRIES][6];
    118 
    119 
    120 
    121 /*
    122   Envelope Adjustor
    123 */
    124 extern const FIXP_SGL FDK_sbrDecoder_sbr_limGains_m[4];
    125 extern const UCHAR    FDK_sbrDecoder_sbr_limGains_e[4];
    126 extern const FIXP_SGL FDK_sbrDecoder_sbr_limiterBandsPerOctaveDiv4[4];
    127 extern const FIXP_SGL FDK_sbrDecoder_sbr_smoothFilter[4];
    128 extern const FIXP_SGL FDK_sbrDecoder_sbr_randomPhase[SBR_NF_NO_RANDOM_VAL][2];
    129 extern const FIXP_SGL harmonicPhaseX [2][4];
    130 
    131 /*
    132   Envelope Extractor
    133 */
    134 extern const int FDK_sbrDecoder_envelopeTable_8  [8][5];
    135 extern const int FDK_sbrDecoder_envelopeTable_15 [15][6];
    136 extern const int FDK_sbrDecoder_envelopeTable_16 [16][6];
    137 
    138 extern const FRAME_INFO FDK_sbrDecoder_sbr_frame_info1_15;
    139 extern const FRAME_INFO FDK_sbrDecoder_sbr_frame_info2_15;
    140 extern const FRAME_INFO FDK_sbrDecoder_sbr_frame_info4_15;
    141 extern const FRAME_INFO FDK_sbrDecoder_sbr_frame_info8_15;
    142 
    143 extern const FRAME_INFO FDK_sbrDecoder_sbr_frame_info1_16;
    144 extern const FRAME_INFO FDK_sbrDecoder_sbr_frame_info2_16;
    145 extern const FRAME_INFO FDK_sbrDecoder_sbr_frame_info4_16;
    146 extern const FRAME_INFO FDK_sbrDecoder_sbr_frame_info8_16;
    147 
    148 extern const SCHAR FDK_sbrDecoder_sbr_huffBook_EnvLevel10T[120][2];
    149 extern const SCHAR FDK_sbrDecoder_sbr_huffBook_EnvLevel10F[120][2];
    150 extern const SCHAR FDK_sbrDecoder_sbr_huffBook_EnvBalance10T[48][2];
    151 extern const SCHAR FDK_sbrDecoder_sbr_huffBook_EnvBalance10F[48][2];
    152 extern const SCHAR FDK_sbrDecoder_sbr_huffBook_EnvLevel11T[62][2];
    153 extern const SCHAR FDK_sbrDecoder_sbr_huffBook_EnvLevel11F[62][2];
    154 extern const SCHAR FDK_sbrDecoder_sbr_huffBook_EnvBalance11T[24][2];
    155 extern const SCHAR FDK_sbrDecoder_sbr_huffBook_EnvBalance11F[24][2];
    156 extern const SCHAR FDK_sbrDecoder_sbr_huffBook_NoiseLevel11T[62][2];
    157 extern const SCHAR FDK_sbrDecoder_sbr_huffBook_NoiseBalance11T[24][2];
    158 
    159 
    160 /*
    161  Parametric stereo
    162 */
    163 
    164 
    165 extern const FIXP_DBL decayScaleFactTable[NO_QMF_CHANNELS];
    166 
    167 /* FIX_BORDER can have 0, 1, 2, 4 envelops */
    168 extern const UCHAR FDK_sbrDecoder_aFixNoEnvDecode[4];
    169 
    170 /* IID & ICC Huffman codebooks */
    171 extern const SCHAR aBookPsIidTimeDecode[28][2];
    172 extern const SCHAR aBookPsIidFreqDecode[28][2];
    173 extern const SCHAR aBookPsIccTimeDecode[14][2];
    174 extern const SCHAR aBookPsIccFreqDecode[14][2];
    175 
    176 /* IID-fine Huffman codebooks */
    177 
    178 extern const SCHAR aBookPsIidFineTimeDecode[60][2];
    179 extern const SCHAR aBookPsIidFineFreqDecode[60][2];
    180 
    181 /* the values of the following 3 tables are shiftet right by 1 ! */
    182 extern const FIXP_DBL ScaleFactors[NO_IID_LEVELS];
    183 extern const FIXP_DBL ScaleFactorsFine[NO_IID_LEVELS_FINE];
    184 extern const FIXP_DBL Alphas[NO_ICC_LEVELS];
    185 
    186 #if defined(ARCH_PREFER_MULT_32x16)
    187 extern const FIXP_SGL aAllpassLinkDecaySer[NO_SERIAL_ALLPASS_LINKS];
    188 extern const FIXP_SGL aaFractDelayPhaseFactorReQmf[NO_QMF_CHANNELS];
    189 extern const FIXP_SGL aaFractDelayPhaseFactorImQmf[NO_QMF_CHANNELS];
    190 extern const FIXP_SGL aaFractDelayPhaseFactorReSubQmf20[NO_SUB_QMF_CHANNELS];
    191 extern const FIXP_SGL aaFractDelayPhaseFactorImSubQmf20[NO_SUB_QMF_CHANNELS];
    192 
    193 extern const FIXP_SGL aaFractDelayPhaseFactorSerReQmf[NO_QMF_CHANNELS][NO_SERIAL_ALLPASS_LINKS];
    194 extern const FIXP_SGL aaFractDelayPhaseFactorSerImQmf[NO_QMF_CHANNELS][NO_SERIAL_ALLPASS_LINKS];
    195 extern const FIXP_SGL aaFractDelayPhaseFactorSerReSubQmf20[NO_SUB_QMF_CHANNELS][NO_SERIAL_ALLPASS_LINKS];
    196 extern const FIXP_SGL aaFractDelayPhaseFactorSerImSubQmf20[NO_SUB_QMF_CHANNELS][NO_SERIAL_ALLPASS_LINKS];
    197 
    198 extern const FIXP_SGL p8_13_20[13];
    199 extern const FIXP_SGL p2_13_20[13];
    200 
    201 #else
    202 extern const FIXP_DBL aAllpassLinkDecaySer[NO_SERIAL_ALLPASS_LINKS];
    203 extern const FIXP_DBL aaFractDelayPhaseFactorReQmf[NO_QMF_CHANNELS];
    204 extern const FIXP_DBL aaFractDelayPhaseFactorImQmf[NO_QMF_CHANNELS];
    205 extern const FIXP_DBL aaFractDelayPhaseFactorReSubQmf20[NO_SUB_QMF_CHANNELS];
    206 extern const FIXP_DBL aaFractDelayPhaseFactorImSubQmf20[NO_SUB_QMF_CHANNELS];
    207 
    208 extern const FIXP_DBL aaFractDelayPhaseFactorSerReQmf[NO_QMF_CHANNELS][NO_SERIAL_ALLPASS_LINKS];
    209 extern const FIXP_DBL aaFractDelayPhaseFactorSerImQmf[NO_QMF_CHANNELS][NO_SERIAL_ALLPASS_LINKS];
    210 extern const FIXP_DBL aaFractDelayPhaseFactorSerReSubQmf20[NO_SUB_QMF_CHANNELS][NO_SERIAL_ALLPASS_LINKS];
    211 extern const FIXP_DBL aaFractDelayPhaseFactorSerImSubQmf20[NO_SUB_QMF_CHANNELS][NO_SERIAL_ALLPASS_LINKS];
    212 
    213 extern const FIXP_DBL p8_13_20[13];
    214 extern const FIXP_DBL p2_13_20[13];
    215 #endif
    216 
    217 extern const UCHAR aAllpassLinkDelaySer[3];
    218 extern const UCHAR delayIndexQmf[NO_QMF_CHANNELS];
    219 extern const UCHAR groupBorders20[NO_IID_GROUPS + 1];
    220 extern const UCHAR groupBorders34[NO_IID_GROUPS_HI_RES + 1];
    221 extern const UCHAR bins2groupMap20[NO_IID_GROUPS];
    222 extern const UCHAR quantizedIIDs[NO_IID_STEPS];
    223 extern const UCHAR quantizedIIDsFine[NO_IID_STEPS_FINE];
    224 extern const UCHAR FDK_sbrDecoder_aNoIidBins[3];
    225 extern const UCHAR FDK_sbrDecoder_aNoIccBins[3];
    226 
    227 
    228 /* Lookup tables for some arithmetic functions */
    229 
    230 #define INV_TABLE_BITS 8
    231 #define INV_TABLE_SIZE (1<<INV_TABLE_BITS)
    232 extern const FIXP_SGL FDK_sbrDecoder_invTable[INV_TABLE_SIZE];
    233 
    234 #endif // __rom_H
    235