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 /*****************************  MPEG-4 AAC Decoder  **************************
     85 
     86    Author(s):   Christian Griebel
     87    Description: Error concealment structs and types
     88 
     89 ******************************************************************************/
     90 
     91 #ifndef CONCEAL_TYPES_H
     92 #define CONCEAL_TYPES_H
     93 
     94 
     95 
     96 #include "machine_type.h"
     97 #include "common_fix.h"
     98 
     99 #include "rvlc_info.h"
    100 
    101 
    102 #define CONCEAL_MAX_NUM_FADE_FACTORS      ( 16 )
    103 
    104  #define FIXP_CNCL        FIXP_DBL
    105  #define FL2FXCONST_CNCL  FL2FXCONST_DBL
    106  #define FX_DBL2FX_CNCL
    107  #define FX_CNCL2FX_DBL
    108  #define CNCL_FRACT_BITS  DFRACT_BITS
    109 
    110 /* Warning: Do not ever change these values. */
    111 typedef enum
    112 {
    113   ConcealMethodNone  = -1,
    114   ConcealMethodMute  =  0,
    115   ConcealMethodNoise =  1,
    116   ConcealMethodInter =  2,
    117   ConcealMethodTonal =  3
    118 
    119 } CConcealmentMethod;
    120 
    121 
    122 typedef enum
    123 {
    124   ConcealState_Ok,
    125   ConcealState_Single,
    126   ConcealState_FadeIn,
    127   ConcealState_Mute,
    128   ConcealState_FadeOut
    129 
    130 } CConcealmentState;
    131 
    132 
    133 typedef struct
    134 {
    135   FIXP_SGL  fadeOutFactor[CONCEAL_MAX_NUM_FADE_FACTORS];
    136   FIXP_SGL  fadeInFactor [CONCEAL_MAX_NUM_FADE_FACTORS];
    137 
    138   CConcealmentMethod  method;
    139 
    140   int  numFadeOutFrames;
    141   int  numFadeInFrames;
    142   int  numMuteReleaseFrames;
    143   int  comfortNoiseLevel;
    144 
    145 } CConcealParams;
    146 
    147 
    148 
    149 typedef struct
    150 {
    151   CConcealParams *pConcealParams;
    152 
    153   FIXP_CNCL spectralCoefficient[1024];
    154   SHORT     specScale[8];
    155 
    156   INT    iRandomPhase;
    157   INT    prevFrameOk[2];
    158   INT    cntFadeFrames;
    159   INT    cntValidFrames;
    160 
    161   SHORT aRvlcPreviousScaleFactor[RVLC_MAX_SFB];  /* needed once per channel */
    162   UCHAR aRvlcPreviousCodebook[RVLC_MAX_SFB];     /* needed once per channel */
    163   SCHAR rvlcPreviousScaleFactorOK;
    164   SCHAR rvlcPreviousBlockType;
    165 
    166 
    167   SCHAR  lastRenderMode;
    168 
    169   UCHAR  windowShape;
    170   UCHAR  windowSequence;
    171   UCHAR  lastWinGrpLen;
    172 
    173   CConcealmentState concealState;
    174 
    175 } CConcealmentInfo;
    176 
    177 
    178 #endif /* #ifndef CONCEAL_TYPES_H */
    179