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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: Psychoaccoustic configuration
     88 
     89 ******************************************************************************/
     90 
     91 #ifndef _PSY_CONFIGURATION_H
     92 #define _PSY_CONFIGURATION_H
     93 
     94 
     95 #include "aacenc.h"
     96 #include "common_fix.h"
     97 
     98 #include "psy_const.h"
     99 #include "aacenc_tns.h"
    100 #include "aacenc_pns.h"
    101 
    102 #define THR_SHIFTBITS         4
    103 #define PCM_QUANT_THR_SCALE  16
    104 
    105 #define C_RATIO (FIXP_DBL)0x02940a10 /* FL2FXCONST_DBL(0.001258925f) << THR_SHIFTBITS; */ /* pow(10.0f, -(29.0f/10.0f)) */
    106 
    107 typedef struct{
    108 
    109   INT sfbCnt;                               /* number of existing sf bands */
    110   INT sfbActive;                            /* number of sf bands containing energy after lowpass */
    111   INT sfbActiveLFE;
    112   INT sfbOffset[MAX_SFB+1];
    113 
    114   INT       filterbank;                     /* LC, LD or ELD */
    115 
    116   FIXP_DBL  sfbPcmQuantThreshold[MAX_SFB];
    117 
    118   INT       maxAllowedIncreaseFactor;          /* preecho control */
    119   FIXP_SGL  minRemainingThresholdFactor;
    120 
    121   INT       lowpassLine;
    122   INT       lowpassLineLFE;
    123   FIXP_DBL  clipEnergy;                        /* for level dependend tmn */
    124 
    125   FIXP_DBL  sfbMaskLowFactor[MAX_SFB];
    126   FIXP_DBL  sfbMaskHighFactor[MAX_SFB];
    127 
    128   FIXP_DBL  sfbMaskLowFactorSprEn[MAX_SFB];
    129   FIXP_DBL  sfbMaskHighFactorSprEn[MAX_SFB];
    130 
    131   FIXP_DBL  sfbMinSnrLdData[MAX_SFB];                /* minimum snr (formerly known as bmax) */
    132 
    133   TNS_CONFIG tnsConf;
    134   PNS_CONFIG pnsConf;
    135 
    136   INT        granuleLength;
    137   INT        allowIS;
    138 
    139 }PSY_CONFIGURATION;
    140 
    141 
    142 typedef struct{
    143     UCHAR sfbCnt;                     /* Number of scalefactor bands */
    144     UCHAR sfbWidth[MAX_SFB_LONG];     /* Width of scalefactor bands for long blocks */
    145 }SFB_PARAM_LONG;
    146 
    147 typedef struct{
    148     UCHAR sfbCnt;                     /* Number of scalefactor bands */
    149     UCHAR sfbWidth[MAX_SFB_SHORT];    /* Width of scalefactor bands for short blocks */
    150 }SFB_PARAM_SHORT;
    151 
    152 
    153 AAC_ENCODER_ERROR FDKaacEnc_InitPsyConfiguration(INT  bitrate,
    154                                                  INT  samplerate,
    155                                                  INT  bandwidth,
    156                                                  INT  blocktype,
    157                                                  INT  granuleLength,
    158                                                  INT  useIS,
    159                                                  PSY_CONFIGURATION *psyConf,
    160                                                  FB_TYPE filterbank);
    161 
    162 #endif /* _PSY_CONFIGURATION_H */
    163 
    164 
    165 
    166