libAACdec/src/conceal_types.h

   1
   2 /* -----------------------------------------------------------------------------------------------------------
   3 Software License for The Fraunhofer FDK AAC Codec Library for Android
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   5 © Copyright  1995 - 2013 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
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   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.
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  22 these patent claims through Via Licensing or directly from the patent owners, and therefore FDK AAC Codec
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  73 5.    CONTACT INFORMATION
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  75 Fraunhofer Institute for Integrated Circuits IIS
  76 Attention: Audio and Multimedia Departments - FDK AAC LL
  77 Am Wolfsmantel 33
  78 91058 Erlangen, Germany
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  80 www.iis.fraunhofer.de/amm
  81 amm-info@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 */