libAACenc/src/dyn_bits.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: Noiseless coder module
  88
  89 ******************************************************************************/
  90
  91 #ifndef __DYN_BITS_H
  92 #define __DYN_BITS_H
  93
  94 #include "common_fix.h"
  95
  96 #include "psy_const.h"
  97 #include "aacenc_tns.h"
  98
  99 #define MAX_SECTIONS          MAX_GROUPED_SFB
 100 #define SECT_ESC_VAL_LONG    31
 101 #define SECT_ESC_VAL_SHORT    7
 102 #define CODE_BOOK_BITS        4
 103 #define SECT_BITS_LONG        5
 104 #define SECT_BITS_SHORT       3
 105 #define PNS_PCM_BITS          9
 106
 107 typedef struct
 108 {
 109   INT codeBook;
 110   INT sfbStart;
 111   INT sfbCnt;
 112   INT sectionBits;              /* huff + si ! */
 113 } SECTION_INFO;
 114
 115
 116 typedef struct
 117 {
 118   INT blockType;
 119   INT noOfGroups;
 120   INT sfbCnt;
 121   INT maxSfbPerGroup;
 122   INT sfbPerGroup;
 123   INT noOfSections;
 124   SECTION_INFO huffsection[MAX_SECTIONS];
 125   INT sideInfoBits;             /* sectioning bits       */
 126   INT huffmanBits;              /* huffman    coded bits */
 127   INT scalefacBits;             /* scalefac   coded bits */
 128   INT noiseNrgBits;             /* noiseEnergy coded bits */
 129   INT firstScf;                 /* first scf to be coded */
 130 } SECTION_DATA;
 131
 132
 133 struct BITCNTR_STATE
 134 {
 135   INT *bitLookUp;
 136   INT *mergeGainLookUp;
 137 };
 138
 139
 140 INT  FDKaacEnc_BCNew(BITCNTR_STATE **phBC
 141           ,UCHAR* dynamic_RAM
 142           );
 143
 144 void FDKaacEnc_BCClose(BITCNTR_STATE **phBC);
 145
 146 #if defined(PNS_PRECOUNT_ENABLE)
 147 INT  noisePreCount(const INT *noiseNrg, INT maxSfb);
 148 #endif
 149
 150 INT FDKaacEnc_dynBitCount(
 151         BITCNTR_STATE* const         hBC,
 152         const SHORT* const           quantSpectrum,
 153         const UINT* const            maxValueInSfb,
 154         const INT* const             scalefac,
 155         const INT                    blockType,
 156         const INT                    sfbCnt,
 157         const INT                    maxSfbPerGroup,
 158         const INT                    sfbPerGroup,
 159         const INT* const             sfbOffset,
 160         SECTION_DATA* const RESTRICT sectionData,
 161         const INT* const             noiseNrg,
 162         const INT* const             isBook,
 163         const INT* const             isScale,
 164         const UINT                   syntaxFlags
 165         );
 166
 167 #endif