libSBRenc/src/invf_est.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.
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  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
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  16 of the MPEG specifications.
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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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  82 ----------------------------------------------------------------------------------------------------------- */
  83
  84 /*!
  85   \file
  86   \brief  Inverse Filtering detection prototypes
  87 */
  88 #ifndef _INV_FILT_DET_H
  89 #define _INV_FILT_DET_H
  90
  91 #include "sbr_encoder.h"
  92 #include "sbr_def.h"
  93
  94 #define INVF_SMOOTHING_LENGTH 2
  95
  96 typedef struct
  97 {
  98   const FIXP_DBL *quantStepsSbr;
  99   const FIXP_DBL *quantStepsOrig;
 100   const FIXP_DBL *nrgBorders;
 101   INT   numRegionsSbr;
 102   INT   numRegionsOrig;
 103   INT   numRegionsNrg;
 104   INVF_MODE regionSpace[5][5];
 105   INVF_MODE regionSpaceTransient[5][5];
 106   INT EnergyCompFactor[5];
 107
 108 }DETECTOR_PARAMETERS;
 109
 110 typedef struct
 111 {
 112   FIXP_DBL  origQuotaMean[INVF_SMOOTHING_LENGTH+1];
 113   FIXP_DBL  sbrQuotaMean[INVF_SMOOTHING_LENGTH+1];
 114   FIXP_DBL  origQuotaMeanStrongest[INVF_SMOOTHING_LENGTH+1];
 115   FIXP_DBL  sbrQuotaMeanStrongest[INVF_SMOOTHING_LENGTH+1];
 116
 117   FIXP_DBL origQuotaMeanFilt;
 118   FIXP_DBL sbrQuotaMeanFilt;
 119   FIXP_DBL origQuotaMeanStrongestFilt;
 120   FIXP_DBL sbrQuotaMeanStrongestFilt;
 121
 122   FIXP_DBL origQuotaMax;
 123   FIXP_DBL sbrQuotaMax;
 124
 125   FIXP_DBL avgNrg;
 126 }DETECTOR_VALUES;
 127
 128
 129
 130 typedef struct
 131 {
 132   INT numberOfStrongest;
 133
 134   INT prevRegionSbr[MAX_NUM_NOISE_VALUES];
 135   INT prevRegionOrig[MAX_NUM_NOISE_VALUES];
 136
 137   INT freqBandTableInvFilt[MAX_NUM_NOISE_VALUES];
 138   INT noDetectorBands;
 139   INT noDetectorBandsMax;
 140
 141   const DETECTOR_PARAMETERS *detectorParams;
 142
 143   INVF_MODE prevInvfMode[MAX_NUM_NOISE_VALUES];
 144   DETECTOR_VALUES detectorValues[MAX_NUM_NOISE_VALUES];
 145
 146   FIXP_DBL nrgAvg;
 147   FIXP_DBL wmQmf[MAX_NUM_NOISE_VALUES];
 148 }
 149 SBR_INV_FILT_EST;
 150
 151 typedef SBR_INV_FILT_EST *HANDLE_SBR_INV_FILT_EST;
 152
 153 void
 154 FDKsbrEnc_qmfInverseFilteringDetector(HANDLE_SBR_INV_FILT_EST hInvFilt,
 155                             FIXP_DBL ** quotaMatrix,
 156                             FIXP_DBL *nrgVector,
 157                             SCHAR    *indexVector,
 158                             INT startIndex,
 159                             INT stopIndex,
 160                             INT transientFlag,
 161                             INVF_MODE* infVec);
 162
 163 INT
 164 FDKsbrEnc_initInvFiltDetector (HANDLE_SBR_INV_FILT_EST hInvFilt,
 165                        INT* freqBandTableDetector,
 166                        INT numDetectorBands,
 167                        UINT useSpeechConfig);
 168
 169 INT
 170 FDKsbrEnc_resetInvFiltDetector(HANDLE_SBR_INV_FILT_EST hInvFilt,
 171                      INT* freqBandTableDetector,
 172                      INT numDetectorBands);
 173
 174 #endif /* _QMF_INV_FILT_H */
 175