libAACenc/src/interface.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.
   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@iis.fraunhofer.de
  82 ----------------------------------------------------------------------------------------------------------- */
  83
  84 /******************************** MPEG Audio Encoder **************************
  85
  86    Initial author:       M.Werner
  87    contents/description: Interface psychoaccoustic/quantizer
  88
  89 ******************************************************************************/
  90
  91 #ifndef _INTERFACE_H
  92 #define _INTERFACE_H
  93
  94 #include "common_fix.h"
  95 #include "FDK_audio.h"
  96
  97 #include "psy_data.h"
  98 #include "aacenc_tns.h"
  99
 100 enum
 101 {
 102   MS_NONE = 0,
 103   MS_SOME = 1,
 104   MS_ALL  = 2
 105 };
 106
 107 enum
 108 {
 109   MS_ON = 1
 110 };
 111
 112 struct TOOLSINFO {
 113   INT msDigest;     /* 0 = no MS; 1 = some MS, 2 = all MS */
 114   INT msMask[MAX_GROUPED_SFB];
 115 };
 116
 117
 118 typedef struct  {
 119   INT       sfbCnt;
 120   INT       sfbPerGroup;
 121   INT       maxSfbPerGroup;
 122   INT       lastWindowSequence;
 123   INT       windowShape;
 124   INT       groupingMask;
 125   INT       sfbOffsets[MAX_GROUPED_SFB+1];
 126
 127   INT       mdctScale;                      /* number of transform shifts */
 128   INT       groupLen[MAX_NO_OF_GROUPS];
 129
 130   TNS_INFO  tnsInfo;
 131   INT       noiseNrg[MAX_GROUPED_SFB];
 132   INT       isBook[MAX_GROUPED_SFB];
 133   INT       isScale[MAX_GROUPED_SFB];
 134
 135   /* memory located in QC_OUT_CHANNEL */
 136   FIXP_DBL  *mdctSpectrum;
 137   FIXP_DBL  *sfbEnergy;
 138   FIXP_DBL  *sfbSpreadEnergy;
 139   FIXP_DBL  *sfbThresholdLdData;
 140   FIXP_DBL  *sfbMinSnrLdData;
 141   FIXP_DBL  *sfbEnergyLdData;
 142
 143
 144  }PSY_OUT_CHANNEL;
 145
 146 typedef struct {
 147
 148   /* information specific to each channel */
 149   PSY_OUT_CHANNEL* psyOutChannel[(2)];
 150
 151   /* information shared by both channels  */
 152   INT       commonWindow;
 153   struct TOOLSINFO toolsInfo;
 154
 155 } PSY_OUT_ELEMENT;
 156
 157 typedef struct {
 158
 159   PSY_OUT_ELEMENT* psyOutElement[(8)];
 160   PSY_OUT_CHANNEL* pPsyOutChannels[(8)];
 161
 162 }PSY_OUT;
 163
 164 inline int isLowDelay( AUDIO_OBJECT_TYPE aot )
 165 {
 166   return (aot==AOT_ER_AAC_LD || aot==AOT_ER_AAC_ELD);
 167 }
 168
 169 #endif /* _INTERFACE_H */