libAACenc/src/band_nrg.h

   1
   2 /* -----------------------------------------------------------------------------------------------------------
   3 Software License for The Fraunhofer FDK AAC Codec Library for Android
   4
   5 © Copyright  1995 - 2013 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
   6   All rights reserved.
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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.
  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.
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  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
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  29 2.    COPYRIGHT LICENSE
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  56 ARE GRANTED BY THIS SOFTWARE LICENSE. Fraunhofer provides no warranty of patent non-infringement with
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  62 4.    DISCLAIMER
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  64 This FDK AAC Codec software is provided by Fraunhofer on behalf of the copyright holders and contributors
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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
  79
  80 www.iis.fraunhofer.de/amm
  81 amm-info@iis.fraunhofer.de
  82 ----------------------------------------------------------------------------------------------------------- */
  83
  84 /******************************** MPEG Audio Encoder **************************
  85
  86    Author(s):   M. Werner
  87    Description: Band/Line energy calculation
  88
  89 ******************************************************************************/
  90
  91 #ifndef _BAND_NRG_H
  92 #define _BAND_NRG_H
  93
  94 #include "common_fix.h"
  95
  96
  97 void
  98 FDKaacEnc_CalcSfbMaxScaleSpec(
  99         const FIXP_DBL     *mdctSpectrum,
 100         const INT          *bandOffset,
 101         INT                *sfbMaxScaleSpec,
 102         const INT           numBands
 103         );
 104
 105 FIXP_DBL
 106 FDKaacEnc_CheckBandEnergyOptim(
 107         const FIXP_DBL     *mdctSpectrum,
 108         INT                *sfbMaxScaleSpec,
 109         const INT          *bandOffset,
 110         const INT           numBands,
 111         FIXP_DBL           *bandEnergy,
 112         FIXP_DBL           *bandEnergyLdData,
 113         INT                 minSpecShift
 114         );
 115
 116 INT
 117 FDKaacEnc_CalcBandEnergyOptimLong(
 118         const FIXP_DBL     *mdctSpectrum,
 119         INT                *sfbMaxScaleSpec,
 120         const INT          *bandOffset,
 121         const INT           numBands,
 122         FIXP_DBL           *bandEnergy,
 123         FIXP_DBL           *bandEnergyLdData
 124         );
 125
 126 void
 127 FDKaacEnc_CalcBandEnergyOptimShort(
 128         const FIXP_DBL     *mdctSpectrum,
 129         INT                *sfbMaxScaleSpec,
 130         const INT          *bandOffset,
 131         const INT           numBands,
 132         FIXP_DBL           *bandEnergy
 133         );
 134
 135
 136 void FDKaacEnc_CalcBandNrgMSOpt(
 137         const FIXP_DBL   *RESTRICT mdctSpectrumLeft,
 138         const FIXP_DBL   *RESTRICT mdctSpectrumRight,
 139         INT              *RESTRICT sfbMaxScaleSpecLeft,
 140         INT              *RESTRICT sfbMaxScaleSpecRight,
 141         const INT        *RESTRICT bandOffset,
 142         const INT         numBands,
 143         FIXP_DBL         *RESTRICT bandEnergyMid,
 144         FIXP_DBL         *RESTRICT bandEnergySide,
 145         INT               calcLdData,
 146         FIXP_DBL         *RESTRICT bandEnergyMidLdData,
 147         FIXP_DBL         *RESTRICT bandEnergySideLdData);
 148
 149 #endif