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      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 /******************************** MPEG Audio Encoder **************************
     85 
     86    Initial author:       M.Werner
     87    contents/description: Global psychoaccoustic constants
     88 
     89 ******************************************************************************/
     90 #ifndef _PSYCONST_H
     91 #define _PSYCONST_H
     92 
     93 
     94 #define TRUE  1
     95 #define FALSE 0
     96 
     97   #define TRANS_FAC         8  /* encoder short long ratio */
     98 
     99 #define FRAME_MAXLEN_SHORT    ((1024)/TRANS_FAC)
    100 #define FRAME_LEN_SHORT_128   ((1024)/TRANS_FAC)
    101 
    102 /* Filterbank type*/
    103 enum FB_TYPE {
    104   FB_LC  = 0,
    105   FB_LD  = 1,
    106   FB_ELD = 2
    107 };
    108 
    109 /* Block types */
    110 #define N_BLOCKTYPES 6
    111 enum
    112 {
    113   LONG_WINDOW = 0,
    114   START_WINDOW,
    115   SHORT_WINDOW,
    116   STOP_WINDOW,
    117   _LOWOV_WINDOW, /* Do not use this block type out side of block_switch.cpp */
    118   WRONG_WINDOW
    119 };
    120 
    121 /* Window shapes */
    122 enum
    123 {
    124   SINE_WINDOW = 0,
    125   KBD_WINDOW  = 1,
    126   LOL_WINDOW = 2 /* Low OverLap window shape for AAC-LD */
    127 };
    128 
    129 /*
    130   MS stuff
    131 */
    132 enum
    133 {
    134   SI_MS_MASK_NONE = 0,
    135   SI_MS_MASK_SOME = 1,
    136   SI_MS_MASK_ALL  = 2
    137 };
    138 
    139 
    140   #define MAX_NO_OF_GROUPS   4
    141   #define MAX_SFB_LONG       51  /* 51 for a memory optimized implementation, maybe 64 for convenient debugging */
    142   #define MAX_SFB_SHORT      15  /* 15 for a memory optimized implementation, maybe 16 for convenient debugging */
    143 
    144 #define MAX_SFB         (MAX_SFB_SHORT > MAX_SFB_LONG ? MAX_SFB_SHORT : MAX_SFB_LONG)   /* = 51 */
    145 #define MAX_GROUPED_SFB (MAX_NO_OF_GROUPS*MAX_SFB_SHORT > MAX_SFB_LONG ? \
    146                          MAX_NO_OF_GROUPS*MAX_SFB_SHORT : MAX_SFB_LONG) /* = 60 */
    147 
    148 #define MAX_INPUT_BUFFER_SIZE  (2*(1024))   /* 2048 */
    149 
    150 
    151 #define PCM_LEVEL             1.0f
    152 #define NORM_PCM              (PCM_LEVEL/32768.0f)
    153 #define NORM_PCM_ENERGY       (NORM_PCM*NORM_PCM)
    154 #define LOG_NORM_PCM          -15
    155 
    156 #define TNS_PREDGAIN_SCALE    (1000)
    157 
    158 #define LFE_LOWPASS_LINE      12
    159 
    160 #endif /* _PSYCONST_H */
    161