libAACenc/src/bit_cnt.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,
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  70 liability, or tort (including negligence), arising in any way out of the use of this software, even if
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  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: Huffman Bitcounter & coder
  88
  89 ******************************************************************************/
  90
  91 #ifndef __BITCOUNT_H
  92 #define __BITCOUNT_H
  93
  94
  95 #include "common_fix.h"
  96 #include "FDK_bitstream.h"
  97 #include "aacEnc_rom.h"
  98
  99 #define INVALID_BITCOUNT (FDK_INT_MAX/4)
 100
 101 /*
 102   code book number table
 103 */
 104
 105 enum codeBookNo{
 106  CODE_BOOK_ZERO_NO=               0,
 107  CODE_BOOK_1_NO=                  1,
 108  CODE_BOOK_2_NO=                  2,
 109  CODE_BOOK_3_NO=                  3,
 110  CODE_BOOK_4_NO=                  4,
 111  CODE_BOOK_5_NO=                  5,
 112  CODE_BOOK_6_NO=                  6,
 113  CODE_BOOK_7_NO=                  7,
 114  CODE_BOOK_8_NO=                  8,
 115  CODE_BOOK_9_NO=                  9,
 116  CODE_BOOK_10_NO=                10,
 117  CODE_BOOK_ESC_NO=               11,
 118  CODE_BOOK_RES_NO=               12,
 119  CODE_BOOK_PNS_NO=               13,
 120  CODE_BOOK_IS_OUT_OF_PHASE_NO=   14,
 121  CODE_BOOK_IS_IN_PHASE_NO=       15
 122
 123 };
 124
 125 /*
 126   code book index table
 127 */
 128
 129 enum codeBookNdx{
 130  CODE_BOOK_ZERO_NDX,
 131  CODE_BOOK_1_NDX,
 132  CODE_BOOK_2_NDX,
 133  CODE_BOOK_3_NDX,
 134  CODE_BOOK_4_NDX,
 135  CODE_BOOK_5_NDX,
 136  CODE_BOOK_6_NDX,
 137  CODE_BOOK_7_NDX,
 138  CODE_BOOK_8_NDX,
 139  CODE_BOOK_9_NDX,
 140  CODE_BOOK_10_NDX,
 141  CODE_BOOK_ESC_NDX,
 142  CODE_BOOK_RES_NDX,
 143  CODE_BOOK_PNS_NDX,
 144  CODE_BOOK_IS_OUT_OF_PHASE_NDX,
 145  CODE_BOOK_IS_IN_PHASE_NDX,
 146  NUMBER_OF_CODE_BOOKS
 147 };
 148
 149 /*
 150   code book lav table
 151 */
 152
 153 enum codeBookLav{
 154  CODE_BOOK_ZERO_LAV=0,
 155  CODE_BOOK_1_LAV=1,
 156  CODE_BOOK_2_LAV=1,
 157  CODE_BOOK_3_LAV=2,
 158  CODE_BOOK_4_LAV=2,
 159  CODE_BOOK_5_LAV=4,
 160  CODE_BOOK_6_LAV=4,
 161  CODE_BOOK_7_LAV=7,
 162  CODE_BOOK_8_LAV=7,
 163  CODE_BOOK_9_LAV=12,
 164  CODE_BOOK_10_LAV=12,
 165  CODE_BOOK_ESC_LAV=16,
 166  CODE_BOOK_SCF_LAV=60,
 167  CODE_BOOK_PNS_LAV=60
 168  };
 169
 170 INT    FDKaacEnc_bitCount(const SHORT *aQuantSpectrum,
 171                           const INT   noOfSpecLines,
 172                           INT         maxVal,
 173                           INT        *bitCountLut);
 174
 175 INT    FDKaacEnc_countValues(SHORT *values, INT width, INT codeBook);
 176
 177 INT    FDKaacEnc_codeValues(SHORT *values, INT width, INT codeBook, HANDLE_FDK_BITSTREAM hBitstream);
 178
 179 INT    FDKaacEnc_codeScalefactorDelta(INT scalefactor, HANDLE_FDK_BITSTREAM hBitstream);
 180
 181 inline INT FDKaacEnc_bitCountScalefactorDelta(const INT delta)
 182 {
 183   FDK_ASSERT( (0 <= (delta+CODE_BOOK_SCF_LAV)) &&  ((delta+CODE_BOOK_SCF_LAV)<(int)(sizeof(FDKaacEnc_huff_ltabscf)/sizeof((FDKaacEnc_huff_ltabscf[0])))) );
 184   return((INT)FDKaacEnc_huff_ltabscf[delta+CODE_BOOK_SCF_LAV]);
 185 }
 186
 187 #endif