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sublay2.cpp
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VC书籍

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Visual C++

sublay2.cpp：源码内容
  1. /* sublay2.cpp
  3.    Layer II subband object implementation, now with MPEG-2 LSF support */
  5. /*
  6.  *  @(#) subband_layer_2.cc 1.8, last edit: 6/15/94 16:51:50
  7.  *  @(#) Copyright (C) 1993, 1994 Tobias Bading (bading@cs.tu-berlin.de)
  8.  *  @(#) Berlin University of Technology
  9.  *
  10.  *  This program is free software; you can redistribute it and/or modify
  11.  *  it under the terms of the GNU General Public License as published by
  12.  *  the Free Software Foundation; either version 2 of the License, or
  13.  *  (at your option) any later version.
  14.  *
  15.  *  This program is distributed in the hope that it will be useful,
  16.  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  17.  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18.  *  GNU General Public License for more details.
  19.  *
  20.  *  You should have received a copy of the GNU General Public License
  21.  *  along with this program; if not, write to the Free Software
  22.  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  23.  */
  25. /*
  26.  *  Changes from version 1.1 to 1.2:
  27.  *    - calculation of the 3 samples contained in one groupcode is now done
  28.  *      through lookup tables, no more integer modulo or division required.
  29.  *      table_*_quantizationsteps[] arrays replaced by
  30.  *      table_*_groupingtables[] arrays
  32.  *    - scalefactors itself instead of scalefactor indices are stored in
  33.  *      SubbandLayer2... objects
  34.  *    - check for small values in [-1.0E-7, 1.0E-7] removed, because the
  35.  *      test itself was slower than some SynthesisFilter::input_sample() calls
  36.  *    - check for illegal scalefactor index 63 removed
  37.  */
  39. #include "sublay2.h"
  40. #include "scalfact.h"
  42. #ifdef __WIN32__
  43. #pragma warning (disable: 4305 4244)
  44. #endif
  47. static const real grouping_5bits[27 * 3] =
  48. // this table contains 3 requantized samples for each legal codeword
  49. // when grouped in 5 bits, i.e. 3 quantizationsteps per sample
  50. {
  51.   -2.0f/3.0f, -2.0f/3.0f, -2.0f/3.0f,
  52.  0.0f, -2.0f/3.0f, -2.0f/3.0f,
  53. 2.0f/3.0f, -2.0f/3.0f, -2.0f/3.0f,
  54.   -2.0f/3.0f,      0.0f, -2.0f/3.0f,
  55.  0.0f,      0.0f, -2.0f/3.0f,
  56. 2.0f/3.0f,      0.0f, -2.0f/3.0f,
  57.   -2.0f/3.0f,  2.0f/3.0f, -2.0f/3.0f,
  58.  0.0f,  2.0f/3.0f, -2.0f/3.0f,
  59. 2.0f/3.0f,  2.0f/3.0f, -2.0f/3.0f,
  60.   -2.0f/3.0f, -2.0f/3.0f,      0.0f,
  61.  0.0f, -2.0f/3.0f,      0.0f,
  62. 2.0f/3.0f, -2.0f/3.0f,      0.0f,
  63.   -2.0f/3.0f,      0.0f,      0.0f,
  64.  0.0f,      0.0f,      0.0f,
  65. 2.0f/3.0f,      0.0f,      0.0f,
  66.   -2.0f/3.0f,  2.0f/3.0f,      0.0f,
  67.  0.0f,  2.0f/3.0f,      0.0f,
  68. 2.0f/3.0f,  2.0f/3.0f,      0.0f,
  69.   -2.0f/3.0f, -2.0f/3.0f,  2.0f/3.0f,
  70.        0.0f, -2.0f/3.0f,  2.0f/3.0f,
  71. 2.0f/3.0f, -2.0f/3.0f,  2.0f/3.0f,
  72.   -2.0f/3.0f,      0.0f,  2.0f/3.0f,
  73.        0.0f,      0.0f,  2.0f/3.0f,
  74.    2.0f/3.0f,      0.0f,  2.0f/3.0f,
  75.   -2.0f/3.0f,  2.0f/3.0f,  2.0f/3.0f,
  76.  0.0f,  2.0f/3.0f,  2.0f/3.0f,
  77.    2.0f/3.0f,  2.0f/3.0f,  2.0f/3.0f
  78. };
  80. static const real grouping_7bits[125 * 3] =
  81. // this table contains 3 requantized samples for each legal codeword
  82. // when grouped in 7 bits, i.e. 5 quantizationsteps per sample
  83. {
  84.   -0.8f, -0.8f, -0.8f,   -0.4f, -0.8f, -0.8f,    0.0f, -0.8f, -0.8f,    0.4f, -0.8f, -0.8f,    0.8f, -0.8f, -0.8f,
  85.   -0.8f, -0.4f, -0.8f,   -0.4f, -0.4f, -0.8f,    0.0f, -0.4f, -0.8f,    0.4f, -0.4f, -0.8f,    0.8f, -0.4f, -0.8f,
  86.   -0.8f,  0.0f, -0.8f,   -0.4f,  0.0f, -0.8f,    0.0f,  0.0f, -0.8f,    0.4f,  0.0f, -0.8f,    0.8f,  0.0f, -0.8f,
  87.   -0.8f,  0.4f, -0.8f,   -0.4f,  0.4f, -0.8f,    0.0f,  0.4f, -0.8f,    0.4f,  0.4f, -0.8f,    0.8f,  0.4f, -0.8f,
  88.   -0.8f,  0.8f, -0.8f,   -0.4f,  0.8f, -0.8f,    0.0f,  0.8f, -0.8f,    0.4f,  0.8f, -0.8f,    0.8f,  0.8f, -0.8f,
  89.   -0.8f, -0.8f, -0.4f,   -0.4f, -0.8f, -0.4f,    0.0f, -0.8f, -0.4f,    0.4f, -0.8f, -0.4f,    0.8f, -0.8f, -0.4f,
  90.   -0.8f, -0.4f, -0.4f,   -0.4f, -0.4f, -0.4f,    0.0f, -0.4f, -0.4f,    0.4f, -0.4f, -0.4f,    0.8f, -0.4f, -0.4f,
  91.   -0.8f,  0.0f, -0.4f,   -0.4f,  0.0f, -0.4f,    0.0f,  0.0f, -0.4f,    0.4f,  0.0f, -0.4f,    0.8f,  0.0f, -0.4f,
  92.   -0.8f,  0.4f, -0.4f,   -0.4f,  0.4f, -0.4f,    0.0f,  0.4f, -0.4f,    0.4f,  0.4f, -0.4f,    0.8f,  0.4f, -0.4f,
  93.   -0.8f,  0.8f, -0.4f,   -0.4f,  0.8f, -0.4f,    0.0f,  0.8f, -0.4f,    0.4f,  0.8f, -0.4f,    0.8f,  0.8f, -0.4f,
  94.   -0.8f, -0.8f,  0.0f,   -0.4f, -0.8f,  0.0f,    0.0f, -0.8f,  0.0f,    0.4f, -0.8f,  0.0f,    0.8f, -0.8f,  0.0f,
  95.   -0.8f, -0.4f,  0.0f,   -0.4f, -0.4f,  0.0f,    0.0f, -0.4f,  0.0f,    0.4f, -0.4f,  0.0f,    0.8f, -0.4f,  0.0f,
  96.   -0.8f,  0.0f,  0.0f,   -0.4f,  0.0f,  0.0f,    0.0f,  0.0f,  0.0f,    0.4f,  0.0f,  0.0f,    0.8f,  0.0f,  0.0f,
  97.   -0.8f,  0.4f,  0.0f,   -0.4f,  0.4f,  0.0f,    0.0f,  0.4f,  0.0f,    0.4f,  0.4f,  0.0f,    0.8f,  0.4f,  0.0f,
  98.   -0.8f,  0.8f,  0.0f,   -0.4f,  0.8f,  0.0f,    0.0f,  0.8f,  0.0f,    0.4f,  0.8f,  0.0f,    0.8f,  0.8f,  0.0f,
  99.   -0.8f, -0.8f,  0.4f,   -0.4f, -0.8f,  0.4f,    0.0f, -0.8f,  0.4f,    0.4f, -0.8f,  0.4f,    0.8f, -0.8f,  0.4f,
  100.   -0.8f, -0.4f,  0.4f,   -0.4f, -0.4f,  0.4f,    0.0f, -0.4f,  0.4f,    0.4f, -0.4f,  0.4f,    0.8f, -0.4f,  0.4f,
  101.   -0.8f,  0.0f,  0.4f,   -0.4f,  0.0f,  0.4f,    0.0f,  0.0f,  0.4f,    0.4f,  0.0f,  0.4f,    0.8f,  0.0f,  0.4f,
  102.   -0.8f,  0.4f,  0.4f,   -0.4f,  0.4f,  0.4f,    0.0f,  0.4f,  0.4f,    0.4f,  0.4f,  0.4f,    0.8f,  0.4f,  0.4f,
  103.   -0.8f,  0.8f,  0.4f,   -0.4f,  0.8f,  0.4f,    0.0f,  0.8f,  0.4f,    0.4f,  0.8f,  0.4f,    0.8f,  0.8f,  0.4f,
  104.   -0.8f, -0.8f,  0.8f,   -0.4f, -0.8f,  0.8f,    0.0f, -0.8f,  0.8f,    0.4f, -0.8f,  0.8f,    0.8f, -0.8f,  0.8f,
  105.   -0.8f, -0.4f,  0.8f,   -0.4f, -0.4f,  0.8f,    0.0f, -0.4f,  0.8f,    0.4f, -0.4f,  0.8f,    0.8f, -0.4f,  0.8f,
  106.   -0.8f,  0.0f,  0.8f,   -0.4f,  0.0f,  0.8f,    0.0f,  0.0f,  0.8f,    0.4f,  0.0f,  0.8f,    0.8f,  0.0f,  0.8f,
  107.   -0.8f,  0.4f,  0.8f,   -0.4f,  0.4f,  0.8f,    0.0f,  0.4f,  0.8f,    0.4f,  0.4f,  0.8f,    0.8f,  0.4f,  0.8f,
  108.   -0.8f,  0.8f,  0.8f,   -0.4f,  0.8f,  0.8f,    0.0f,  0.8f,  0.8f,    0.4f,  0.8f,  0.8f,    0.8f,  0.8f,  0.8f
  109. };
  111. static const real grouping_10bits[729 * 3] =
  112. // this table contains 3 requantized samples for each legal codeword
  113. // when grouped in 10 bits, i.e. 9 quantizationsteps per sample
  114. {
  115.   -8.0f/9.0f, -8.0f/9.0f, -8.0f/9.0f,   -6.0f/9.0f, -8.0f/9.0f, -8.0f/9.0f,   -4.0f/9.0f, -8.0f/9.0f, -8.0f/9.0f,
  116.   -2.0f/9.0f, -8.0f/9.0f, -8.0f/9.0f,        0.0f, -8.0f/9.0f, -8.0f/9.0f,    2.0f/9.0f, -8.0f/9.0f, -8.0f/9.0f,
  117. 4.0f/9.0f, -8.0f/9.0f, -8.0f/9.0f,    6.0f/9.0f, -8.0f/9.0f, -8.0f/9.0f,    8.0f/9.0f, -8.0f/9.0f, -8.0f/9.0f,
  118.   -8.0f/9.0f, -6.0f/9.0f, -8.0f/9.0f,   -6.0f/9.0f, -6.0f/9.0f, -8.0f/9.0f,   -4.0f/9.0f, -6.0f/9.0f, -8.0f/9.0f,
  119.   -2.0f/9.0f, -6.0f/9.0f, -8.0f/9.0f,        0.0f, -6.0f/9.0f, -8.0f/9.0f,    2.0f/9.0f, -6.0f/9.0f, -8.0f/9.0f,
  120. 4.0f/9.0f, -6.0f/9.0f, -8.0f/9.0f,    6.0f/9.0f, -6.0f/9.0f, -8.0f/9.0f,    8.0f/9.0f, -6.0f/9.0f, -8.0f/9.0f,
  121.   -8.0f/9.0f, -4.0f/9.0f, -8.0f/9.0f,   -6.0f/9.0f, -4.0f/9.0f, -8.0f/9.0f,   -4.0f/9.0f, -4.0f/9.0f, -8.0f/9.0f,
  122.   -2.0f/9.0f, -4.0f/9.0f, -8.0f/9.0f,        0.0f, -4.0f/9.0f, -8.0f/9.0f,    2.0f/9.0f, -4.0f/9.0f, -8.0f/9.0f,
  123. 4.0f/9.0f, -4.0f/9.0f, -8.0f/9.0f,    6.0f/9.0f, -4.0f/9.0f, -8.0f/9.0f,    8.0f/9.0f, -4.0f/9.0f, -8.0f/9.0f,
  124.   -8.0f/9.0f, -2.0f/9.0f, -8.0f/9.0f,   -6.0f/9.0f, -2.0f/9.0f, -8.0f/9.0f,   -4.0f/9.0f, -2.0f/9.0f, -8.0f/9.0f,
  125.   -2.0f/9.0f, -2.0f/9.0f, -8.0f/9.0f,        0.0f, -2.0f/9.0f, -8.0f/9.0f,    2.0f/9.0f, -2.0f/9.0f, -8.0f/9.0f,
  126. 4.0f/9.0f, -2.0f/9.0f, -8.0f/9.0f,    6.0f/9.0f, -2.0f/9.0f, -8.0f/9.0f,    8.0f/9.0f, -2.0f/9.0f, -8.0f/9.0f,
  127.   -8.0f/9.0f,      0.0f, -8.0f/9.0f,   -6.0f/9.0f,      0.0f, -8.0f/9.0f,   -4.0f/9.0f,      0.0f, -8.0f/9.0f,
  128.   -2.0f/9.0f,      0.0f, -8.0f/9.0f,        0.0f,      0.0f, -8.0f/9.0f,    2.0f/9.0f,      0.0f, -8.0f/9.0f,
  129. 4.0f/9.0f,      0.0f, -8.0f/9.0f,    6.0f/9.0f,      0.0f, -8.0f/9.0f,    8.0f/9.0f,      0.0f, -8.0f/9.0f,
  130.   -8.0f/9.0f,  2.0f/9.0f, -8.0f/9.0f,   -6.0f/9.0f,  2.0f/9.0f, -8.0f/9.0f,   -4.0f/9.0f,  2.0f/9.0f, -8.0f/9.0f,
  131.   -2.0f/9.0f,  2.0f/9.0f, -8.0f/9.0f,        0.0f,  2.0f/9.0f, -8.0f/9.0f,    2.0f/9.0f,  2.0f/9.0f, -8.0f/9.0f,
  132. 4.0f/9.0f,  2.0f/9.0f, -8.0f/9.0f,    6.0f/9.0f,  2.0f/9.0f, -8.0f/9.0f,    8.0f/9.0f,  2.0f/9.0f, -8.0f/9.0f,
  133.   -8.0f/9.0f,  4.0f/9.0f, -8.0f/9.0f,   -6.0f/9.0f,  4.0f/9.0f, -8.0f/9.0f,   -4.0f/9.0f,  4.0f/9.0f, -8.0f/9.0f,
  134.   -2.0f/9.0f,  4.0f/9.0f, -8.0f/9.0f,        0.0f,  4.0f/9.0f, -8.0f/9.0f,    2.0f/9.0f,  4.0f/9.0f, -8.0f/9.0f,
  135. 4.0f/9.0f,  4.0f/9.0f, -8.0f/9.0f,    6.0f/9.0f,  4.0f/9.0f, -8.0f/9.0f,    8.0f/9.0f,  4.0f/9.0f, -8.0f/9.0f,
  136.   -8.0f/9.0f,  6.0f/9.0f, -8.0f/9.0f,   -6.0f/9.0f,  6.0f/9.0f, -8.0f/9.0f,   -4.0f/9.0f,  6.0f/9.0f, -8.0f/9.0f,
  137.   -2.0f/9.0f,  6.0f/9.0f, -8.0f/9.0f,        0.0f,  6.0f/9.0f, -8.0f/9.0f,    2.0f/9.0f,  6.0f/9.0f, -8.0f/9.0f,
  138. 4.0f/9.0f,  6.0f/9.0f, -8.0f/9.0f,    6.0f/9.0f,  6.0f/9.0f, -8.0f/9.0f,    8.0f/9.0f,  6.0f/9.0f, -8.0f/9.0f,
  139.   -8.0f/9.0f,  8.0f/9.0f, -8.0f/9.0f,   -6.0f/9.0f,  8.0f/9.0f, -8.0f/9.0f,   -4.0f/9.0f,  8.0f/9.0f, -8.0f/9.0f,
  140.   -2.0f/9.0f,  8.0f/9.0f, -8.0f/9.0f,        0.0f,  8.0f/9.0f, -8.0f/9.0f,    2.0f/9.0f,  8.0f/9.0f, -8.0f/9.0f,
  141. 4.0f/9.0f,  8.0f/9.0f, -8.0f/9.0f,    6.0f/9.0f,  8.0f/9.0f, -8.0f/9.0f,    8.0f/9.0f,  8.0f/9.0f, -8.0f/9.0f,
  142.   -8.0f/9.0f, -8.0f/9.0f, -6.0f/9.0f,   -6.0f/9.0f, -8.0f/9.0f, -6.0f/9.0f,   -4.0f/9.0f, -8.0f/9.0f, -6.0f/9.0f,
  143.   -2.0f/9.0f, -8.0f/9.0f, -6.0f/9.0f,        0.0f, -8.0f/9.0f, -6.0f/9.0f,    2.0f/9.0f, -8.0f/9.0f, -6.0f/9.0f,
  144. 4.0f/9.0f, -8.0f/9.0f, -6.0f/9.0f,    6.0f/9.0f, -8.0f/9.0f, -6.0f/9.0f,    8.0f/9.0f, -8.0f/9.0f, -6.0f/9.0f,
  145.   -8.0f/9.0f, -6.0f/9.0f, -6.0f/9.0f,   -6.0f/9.0f, -6.0f/9.0f, -6.0f/9.0f,   -4.0f/9.0f, -6.0f/9.0f, -6.0f/9.0f,
  146.   -2.0f/9.0f, -6.0f/9.0f, -6.0f/9.0f,        0.0f, -6.0f/9.0f, -6.0f/9.0f,    2.0f/9.0f, -6.0f/9.0f, -6.0f/9.0f,
  147. 4.0f/9.0f, -6.0f/9.0f, -6.0f/9.0f,    6.0f/9.0f, -6.0f/9.0f, -6.0f/9.0f,    8.0f/9.0f, -6.0f/9.0f, -6.0f/9.0f,
  148.   -8.0f/9.0f, -4.0f/9.0f, -6.0f/9.0f,   -6.0f/9.0f, -4.0f/9.0f, -6.0f/9.0f,   -4.0f/9.0f, -4.0f/9.0f, -6.0f/9.0f,
  149.   -2.0f/9.0f, -4.0f/9.0f, -6.0f/9.0f,        0.0f, -4.0f/9.0f, -6.0f/9.0f,    2.0f/9.0f, -4.0f/9.0f, -6.0f/9.0f,
  150. 4.0f/9.0f, -4.0f/9.0f, -6.0f/9.0f,    6.0f/9.0f, -4.0f/9.0f, -6.0f/9.0f,    8.0f/9.0f, -4.0f/9.0f, -6.0f/9.0f,
  151.   -8.0f/9.0f, -2.0f/9.0f, -6.0f/9.0f,   -6.0f/9.0f, -2.0f/9.0f, -6.0f/9.0f,   -4.0f/9.0f, -2.0f/9.0f, -6.0f/9.0f,
  152.   -2.0f/9.0f, -2.0f/9.0f, -6.0f/9.0f,        0.0f, -2.0f/9.0f, -6.0f/9.0f,    2.0f/9.0f, -2.0f/9.0f, -6.0f/9.0f,
  153. 4.0f/9.0f, -2.0f/9.0f, -6.0f/9.0f,    6.0f/9.0f, -2.0f/9.0f, -6.0f/9.0f,    8.0f/9.0f, -2.0f/9.0f, -6.0f/9.0f,
  154.   -8.0f/9.0f,      0.0f, -6.0f/9.0f,   -6.0f/9.0f,      0.0f, -6.0f/9.0f,   -4.0f/9.0f,      0.0f, -6.0f/9.0f,
  155.   -2.0f/9.0f,      0.0f, -6.0f/9.0f,        0.0f,      0.0f, -6.0f/9.0f,    2.0f/9.0f,      0.0f, -6.0f/9.0f,
  156. 4.0f/9.0f,      0.0f, -6.0f/9.0f,    6.0f/9.0f,      0.0f, -6.0f/9.0f,    8.0f/9.0f,      0.0f, -6.0f/9.0f,
  157.   -8.0f/9.0f,  2.0f/9.0f, -6.0f/9.0f,   -6.0f/9.0f,  2.0f/9.0f, -6.0f/9.0f,   -4.0f/9.0f,  2.0f/9.0f, -6.0f/9.0f,
  158.   -2.0f/9.0f,  2.0f/9.0f, -6.0f/9.0f,        0.0f,  2.0f/9.0f, -6.0f/9.0f,    2.0f/9.0f,  2.0f/9.0f, -6.0f/9.0f,
  159. 4.0f/9.0f,  2.0f/9.0f, -6.0f/9.0f,    6.0f/9.0f,  2.0f/9.0f, -6.0f/9.0f,    8.0f/9.0f,  2.0f/9.0f, -6.0f/9.0f,
  160.   -8.0f/9.0f,  4.0f/9.0f, -6.0f/9.0f,   -6.0f/9.0f,  4.0f/9.0f, -6.0f/9.0f,   -4.0f/9.0f,  4.0f/9.0f, -6.0f/9.0f,
  161.   -2.0f/9.0f,  4.0f/9.0f, -6.0f/9.0f,        0.0f,  4.0f/9.0f, -6.0f/9.0f,    2.0f/9.0f,  4.0f/9.0f, -6.0f/9.0f,
  162. 4.0f/9.0f,  4.0f/9.0f, -6.0f/9.0f,    6.0f/9.0f,  4.0f/9.0f, -6.0f/9.0f,    8.0f/9.0f,  4.0f/9.0f, -6.0f/9.0f,
  163.   -8.0f/9.0f,  6.0f/9.0f, -6.0f/9.0f,   -6.0f/9.0f,  6.0f/9.0f, -6.0f/9.0f,   -4.0f/9.0f,  6.0f/9.0f, -6.0f/9.0f,
  164.   -2.0f/9.0f,  6.0f/9.0f, -6.0f/9.0f,        0.0f,  6.0f/9.0f, -6.0f/9.0f,    2.0f/9.0f,  6.0f/9.0f, -6.0f/9.0f,
  165. 4.0f/9.0f,  6.0f/9.0f, -6.0f/9.0f,    6.0f/9.0f,  6.0f/9.0f, -6.0f/9.0f,    8.0f/9.0f,  6.0f/9.0f, -6.0f/9.0f,
  166.   -8.0f/9.0f,  8.0f/9.0f, -6.0f/9.0f,   -6.0f/9.0f,  8.0f/9.0f, -6.0f/9.0f,   -4.0f/9.0f,  8.0f/9.0f, -6.0f/9.0f,
  167.   -2.0f/9.0f,  8.0f/9.0f, -6.0f/9.0f,        0.0f,  8.0f/9.0f, -6.0f/9.0f,    2.0f/9.0f,  8.0f/9.0f, -6.0f/9.0f,
  168. 4.0f/9.0f,  8.0f/9.0f, -6.0f/9.0f,    6.0f/9.0f,  8.0f/9.0f, -6.0f/9.0f,    8.0f/9.0f,  8.0f/9.0f, -6.0f/9.0f,
  169.   -8.0f/9.0f, -8.0f/9.0f, -4.0f/9.0f,   -6.0f/9.0f, -8.0f/9.0f, -4.0f/9.0f,   -4.0f/9.0f, -8.0f/9.0f, -4.0f/9.0f,
  170.   -2.0f/9.0f, -8.0f/9.0f, -4.0f/9.0f,        0.0f, -8.0f/9.0f, -4.0f/9.0f,    2.0f/9.0f, -8.0f/9.0f, -4.0f/9.0f,
  171. 4.0f/9.0f, -8.0f/9.0f, -4.0f/9.0f,    6.0f/9.0f, -8.0f/9.0f, -4.0f/9.0f,    8.0f/9.0f, -8.0f/9.0f, -4.0f/9.0f,
  172.   -8.0f/9.0f, -6.0f/9.0f, -4.0f/9.0f,   -6.0f/9.0f, -6.0f/9.0f, -4.0f/9.0f,   -4.0f/9.0f, -6.0f/9.0f, -4.0f/9.0f,
  173.   -2.0f/9.0f, -6.0f/9.0f, -4.0f/9.0f,        0.0f, -6.0f/9.0f, -4.0f/9.0f,    2.0f/9.0f, -6.0f/9.0f, -4.0f/9.0f,
  174. 4.0f/9.0f, -6.0f/9.0f, -4.0f/9.0f,    6.0f/9.0f, -6.0f/9.0f, -4.0f/9.0f,    8.0f/9.0f, -6.0f/9.0f, -4.0f/9.0f,
  175.   -8.0f/9.0f, -4.0f/9.0f, -4.0f/9.0f,   -6.0f/9.0f, -4.0f/9.0f, -4.0f/9.0f,   -4.0f/9.0f, -4.0f/9.0f, -4.0f/9.0f,
  176.   -2.0f/9.0f, -4.0f/9.0f, -4.0f/9.0f,        0.0f, -4.0f/9.0f, -4.0f/9.0f,    2.0f/9.0f, -4.0f/9.0f, -4.0f/9.0f,
  177. 4.0f/9.0f, -4.0f/9.0f, -4.0f/9.0f,    6.0f/9.0f, -4.0f/9.0f, -4.0f/9.0f,    8.0f/9.0f, -4.0f/9.0f, -4.0f/9.0f,
  178.   -8.0f/9.0f, -2.0f/9.0f, -4.0f/9.0f,   -6.0f/9.0f, -2.0f/9.0f, -4.0f/9.0f,   -4.0f/9.0f, -2.0f/9.0f, -4.0f/9.0f,
  179.   -2.0f/9.0f, -2.0f/9.0f, -4.0f/9.0f,        0.0f, -2.0f/9.0f, -4.0f/9.0f,    2.0f/9.0f, -2.0f/9.0f, -4.0f/9.0f,
  180. 4.0f/9.0f, -2.0f/9.0f, -4.0f/9.0f,    6.0f/9.0f, -2.0f/9.0f, -4.0f/9.0f,    8.0f/9.0f, -2.0f/9.0f, -4.0f/9.0f,
  181.   -8.0f/9.0f,      0.0f, -4.0f/9.0f,   -6.0f/9.0f,      0.0f, -4.0f/9.0f,   -4.0f/9.0f,      0.0f, -4.0f/9.0f,
  182.   -2.0f/9.0f,      0.0f, -4.0f/9.0f,        0.0f,      0.0f, -4.0f/9.0f,    2.0f/9.0f,      0.0f, -4.0f/9.0f,
  183. 4.0f/9.0f,      0.0f, -4.0f/9.0f,    6.0f/9.0f,      0.0f, -4.0f/9.0f,    8.0f/9.0f,      0.0f, -4.0f/9.0f,
  184.   -8.0f/9.0f,  2.0f/9.0f, -4.0f/9.0f,   -6.0f/9.0f,  2.0f/9.0f, -4.0f/9.0f,   -4.0f/9.0f,  2.0f/9.0f, -4.0f/9.0f,
  185.   -2.0f/9.0f,  2.0f/9.0f, -4.0f/9.0f,        0.0f,  2.0f/9.0f, -4.0f/9.0f,    2.0f/9.0f,  2.0f/9.0f, -4.0f/9.0f,
  186. 4.0f/9.0f,  2.0f/9.0f, -4.0f/9.0f,    6.0f/9.0f,  2.0f/9.0f, -4.0f/9.0f,    8.0f/9.0f,  2.0f/9.0f, -4.0f/9.0f,
  187.   -8.0f/9.0f,  4.0f/9.0f, -4.0f/9.0f,   -6.0f/9.0f,  4.0f/9.0f, -4.0f/9.0f,   -4.0f/9.0f,  4.0f/9.0f, -4.0f/9.0f,
  188.   -2.0f/9.0f,  4.0f/9.0f, -4.0f/9.0f,        0.0f,  4.0f/9.0f, -4.0f/9.0f,    2.0f/9.0f,  4.0f/9.0f, -4.0f/9.0f,
  189. 4.0f/9.0f,  4.0f/9.0f, -4.0f/9.0f,    6.0f/9.0f,  4.0f/9.0f, -4.0f/9.0f,    8.0f/9.0f,  4.0f/9.0f, -4.0f/9.0f,
  190.   -8.0f/9.0f,  6.0f/9.0f, -4.0f/9.0f,   -6.0f/9.0f,  6.0f/9.0f, -4.0f/9.0f,   -4.0f/9.0f,  6.0f/9.0f, -4.0f/9.0f,
  191.   -2.0f/9.0f,  6.0f/9.0f, -4.0f/9.0f,        0.0f,  6.0f/9.0f, -4.0f/9.0f,    2.0f/9.0f,  6.0f/9.0f, -4.0f/9.0f,
  192. 4.0f/9.0f,  6.0f/9.0f, -4.0f/9.0f,    6.0f/9.0f,  6.0f/9.0f, -4.0f/9.0f,    8.0f/9.0f,  6.0f/9.0f, -4.0f/9.0f,
  193.   -8.0f/9.0f,  8.0f/9.0f, -4.0f/9.0f,   -6.0f/9.0f,  8.0f/9.0f, -4.0f/9.0f,   -4.0f/9.0f,  8.0f/9.0f, -4.0f/9.0f,
  194.   -2.0f/9.0f,  8.0f/9.0f, -4.0f/9.0f,        0.0f,  8.0f/9.0f, -4.0f/9.0f,    2.0f/9.0f,  8.0f/9.0f, -4.0f/9.0f,
  195. 4.0f/9.0f,  8.0f/9.0f, -4.0f/9.0f,    6.0f/9.0f,  8.0f/9.0f, -4.0f/9.0f,    8.0f/9.0f,  8.0f/9.0f, -4.0f/9.0f,
  196.   -8.0f/9.0f, -8.0f/9.0f, -2.0f/9.0f,   -6.0f/9.0f, -8.0f/9.0f, -2.0f/9.0f,   -4.0f/9.0f, -8.0f/9.0f, -2.0f/9.0f,
  197.   -2.0f/9.0f, -8.0f/9.0f, -2.0f/9.0f,        0.0f, -8.0f/9.0f, -2.0f/9.0f,    2.0f/9.0f, -8.0f/9.0f, -2.0f/9.0f,
  198. 4.0f/9.0f, -8.0f/9.0f, -2.0f/9.0f,    6.0f/9.0f, -8.0f/9.0f, -2.0f/9.0f,    8.0f/9.0f, -8.0f/9.0f, -2.0f/9.0f,
  199.   -8.0f/9.0f, -6.0f/9.0f, -2.0f/9.0f,   -6.0f/9.0f, -6.0f/9.0f, -2.0f/9.0f,   -4.0f/9.0f, -6.0f/9.0f, -2.0f/9.0f,
  200.   -2.0f/9.0f, -6.0f/9.0f, -2.0f/9.0f,        0.0f, -6.0f/9.0f, -2.0f/9.0f,    2.0f/9.0f, -6.0f/9.0f, -2.0f/9.0f,
  201. 4.0f/9.0f, -6.0f/9.0f, -2.0f/9.0f,    6.0f/9.0f, -6.0f/9.0f, -2.0f/9.0f,    8.0f/9.0f, -6.0f/9.0f, -2.0f/9.0f,
  202.   -8.0f/9.0f, -4.0f/9.0f, -2.0f/9.0f,   -6.0f/9.0f, -4.0f/9.0f, -2.0f/9.0f,   -4.0f/9.0f, -4.0f/9.0f, -2.0f/9.0f,
  203.   -2.0f/9.0f, -4.0f/9.0f, -2.0f/9.0f,        0.0f, -4.0f/9.0f, -2.0f/9.0f,    2.0f/9.0f, -4.0f/9.0f, -2.0f/9.0f,
  204. 4.0f/9.0f, -4.0f/9.0f, -2.0f/9.0f,    6.0f/9.0f, -4.0f/9.0f, -2.0f/9.0f,    8.0f/9.0f, -4.0f/9.0f, -2.0f/9.0f,
  205.   -8.0f/9.0f, -2.0f/9.0f, -2.0f/9.0f,   -6.0f/9.0f, -2.0f/9.0f, -2.0f/9.0f,   -4.0f/9.0f, -2.0f/9.0f, -2.0f/9.0f,
  206.   -2.0f/9.0f, -2.0f/9.0f, -2.0f/9.0f,        0.0f, -2.0f/9.0f, -2.0f/9.0f,    2.0f/9.0f, -2.0f/9.0f, -2.0f/9.0f,
  207. 4.0f/9.0f, -2.0f/9.0f, -2.0f/9.0f,    6.0f/9.0f, -2.0f/9.0f, -2.0f/9.0f,    8.0f/9.0f, -2.0f/9.0f, -2.0f/9.0f,
  208.   -8.0f/9.0f,      0.0f, -2.0f/9.0f,   -6.0f/9.0f,      0.0f, -2.0f/9.0f,   -4.0f/9.0f,      0.0f, -2.0f/9.0f,
  209.   -2.0f/9.0f,      0.0f, -2.0f/9.0f,        0.0f,      0.0f, -2.0f/9.0f,    2.0f/9.0f,      0.0f, -2.0f/9.0f,
  210. 4.0f/9.0f,      0.0f, -2.0f/9.0f,    6.0f/9.0f,      0.0f, -2.0f/9.0f,    8.0f/9.0f,      0.0f, -2.0f/9.0f,
  211.   -8.0f/9.0f,  2.0f/9.0f, -2.0f/9.0f,   -6.0f/9.0f,  2.0f/9.0f, -2.0f/9.0f,   -4.0f/9.0f,  2.0f/9.0f, -2.0f/9.0f,
  212.   -2.0f/9.0f,  2.0f/9.0f, -2.0f/9.0f,        0.0f,  2.0f/9.0f, -2.0f/9.0f,    2.0f/9.0f,  2.0f/9.0f, -2.0f/9.0f,
  213. 4.0f/9.0f,  2.0f/9.0f, -2.0f/9.0f,    6.0f/9.0f,  2.0f/9.0f, -2.0f/9.0f,    8.0f/9.0f,  2.0f/9.0f, -2.0f/9.0f,
  214.   -8.0f/9.0f,  4.0f/9.0f, -2.0f/9.0f,   -6.0f/9.0f,  4.0f/9.0f, -2.0f/9.0f,   -4.0f/9.0f,  4.0f/9.0f, -2.0f/9.0f,
  215.   -2.0f/9.0f,  4.0f/9.0f, -2.0f/9.0f,        0.0f,  4.0f/9.0f, -2.0f/9.0f,    2.0f/9.0f,  4.0f/9.0f, -2.0f/9.0f,
  216. 4.0f/9.0f,  4.0f/9.0f, -2.0f/9.0f,    6.0f/9.0f,  4.0f/9.0f, -2.0f/9.0f,    8.0f/9.0f,  4.0f/9.0f, -2.0f/9.0f,
  217.   -8.0f/9.0f,  6.0f/9.0f, -2.0f/9.0f,   -6.0f/9.0f,  6.0f/9.0f, -2.0f/9.0f,   -4.0f/9.0f,  6.0f/9.0f, -2.0f/9.0f,
  218.   -2.0f/9.0f,  6.0f/9.0f, -2.0f/9.0f,        0.0f,  6.0f/9.0f, -2.0f/9.0f,    2.0f/9.0f,  6.0f/9.0f, -2.0f/9.0f,
  219. 4.0f/9.0f,  6.0f/9.0f, -2.0f/9.0f,    6.0f/9.0f,  6.0f/9.0f, -2.0f/9.0f,    8.0f/9.0f,  6.0f/9.0f, -2.0f/9.0f,
  220.   -8.0f/9.0f,  8.0f/9.0f, -2.0f/9.0f,   -6.0f/9.0f,  8.0f/9.0f, -2.0f/9.0f,   -4.0f/9.0f,  8.0f/9.0f, -2.0f/9.0f,
  221.   -2.0f/9.0f,  8.0f/9.0f, -2.0f/9.0f,        0.0f,  8.0f/9.0f, -2.0f/9.0f,    2.0f/9.0f,  8.0f/9.0f, -2.0f/9.0f,
  222. 4.0f/9.0f,  8.0f/9.0f, -2.0f/9.0f,    6.0f/9.0f,  8.0f/9.0f, -2.0f/9.0f,    8.0f/9.0f,  8.0f/9.0f, -2.0f/9.0f,
  223.   -8.0f/9.0f, -8.0f/9.0f,      0.0f,   -6.0f/9.0f, -8.0f/9.0f,      0.0f,   -4.0f/9.0f, -8.0f/9.0f,      0.0f,
  224.   -2.0f/9.0f, -8.0f/9.0f,      0.0f,        0.0f, -8.0f/9.0f,      0.0f,    2.0f/9.0f, -8.0f/9.0f,      0.0f,
  225. 4.0f/9.0f, -8.0f/9.0f,      0.0f,    6.0f/9.0f, -8.0f/9.0f,      0.0f,    8.0f/9.0f, -8.0f/9.0f,      0.0f,
  226.   -8.0f/9.0f, -6.0f/9.0f,      0.0f,   -6.0f/9.0f, -6.0f/9.0f,      0.0f,   -4.0f/9.0f, -6.0f/9.0f,      0.0f,
  227.   -2.0f/9.0f, -6.0f/9.0f,      0.0f,        0.0f, -6.0f/9.0f,      0.0f,    2.0f/9.0f, -6.0f/9.0f,      0.0f,
  228. 4.0f/9.0f, -6.0f/9.0f,      0.0f,    6.0f/9.0f, -6.0f/9.0f,      0.0f,    8.0f/9.0f, -6.0f/9.0f,      0.0f,
  229.   -8.0f/9.0f, -4.0f/9.0f,      0.0f,   -6.0f/9.0f, -4.0f/9.0f,      0.0f,   -4.0f/9.0f, -4.0f/9.0f,      0.0f,
  230.   -2.0f/9.0f, -4.0f/9.0f,      0.0f,        0.0f, -4.0f/9.0f,      0.0f,    2.0f/9.0f, -4.0f/9.0f,      0.0f,
  231. 4.0f/9.0f, -4.0f/9.0f,      0.0f,    6.0f/9.0f, -4.0f/9.0f,      0.0f,    8.0f/9.0f, -4.0f/9.0f,      0.0f,
  232.   -8.0f/9.0f, -2.0f/9.0f,      0.0f,   -6.0f/9.0f, -2.0f/9.0f,      0.0f,   -4.0f/9.0f, -2.0f/9.0f,      0.0f,
  233.   -2.0f/9.0f, -2.0f/9.0f,      0.0f,        0.0f, -2.0f/9.0f,      0.0f,    2.0f/9.0f, -2.0f/9.0f,      0.0f,
  234. 4.0f/9.0f, -2.0f/9.0f,      0.0f,    6.0f/9.0f, -2.0f/9.0f,      0.0f,    8.0f/9.0f, -2.0f/9.0f,      0.0f,
  235.   -8.0f/9.0f,      0.0f,      0.0f,   -6.0f/9.0f,      0.0f,      0.0f,   -4.0f/9.0f,      0.0f,      0.0f,
  236.   -2.0f/9.0f,      0.0f,      0.0f,        0.0f,      0.0f,      0.0f,    2.0f/9.0f,      0.0f,      0.0f,
  237. 4.0f/9.0f,      0.0f,      0.0f,    6.0f/9.0f,      0.0f,      0.0f,    8.0f/9.0f,      0.0f,      0.0f,
  238.   -8.0f/9.0f,  2.0f/9.0f,      0.0f,   -6.0f/9.0f,  2.0f/9.0f,      0.0f,   -4.0f/9.0f,  2.0f/9.0f,      0.0f,
  239.   -2.0f/9.0f,  2.0f/9.0f,      0.0f,        0.0f,  2.0f/9.0f,      0.0f,    2.0f/9.0f,  2.0f/9.0f,      0.0f,
  240. 4.0f/9.0f,  2.0f/9.0f,      0.0f,    6.0f/9.0f,  2.0f/9.0f,      0.0f,    8.0f/9.0f,  2.0f/9.0f,      0.0f,
  241.   -8.0f/9.0f,  4.0f/9.0f,      0.0f,   -6.0f/9.0f,  4.0f/9.0f,      0.0f,   -4.0f/9.0f,  4.0f/9.0f,      0.0f,
  242.   -2.0f/9.0f,  4.0f/9.0f,      0.0f,        0.0f,  4.0f/9.0f,      0.0f,    2.0f/9.0f,  4.0f/9.0f,      0.0f,
  243. 4.0f/9.0f,  4.0f/9.0f,      0.0f,    6.0f/9.0f,  4.0f/9.0f,      0.0f,    8.0f/9.0f,  4.0f/9.0f,      0.0f,
  244.   -8.0f/9.0f,  6.0f/9.0f,      0.0f,   -6.0f/9.0f,  6.0f/9.0f,      0.0f,   -4.0f/9.0f,  6.0f/9.0f,      0.0f,
  245.   -2.0f/9.0f,  6.0f/9.0f,      0.0f,        0.0f,  6.0f/9.0f,      0.0f,    2.0f/9.0f,  6.0f/9.0f,      0.0f,
  246. 4.0f/9.0f,  6.0f/9.0f,      0.0f,    6.0f/9.0f,  6.0f/9.0f,      0.0f,    8.0f/9.0f,  6.0f/9.0f,      0.0f,
  247.   -8.0f/9.0f,  8.0f/9.0f,      0.0f,   -6.0f/9.0f,  8.0f/9.0f,      0.0f,   -4.0f/9.0f,  8.0f/9.0f,      0.0f,
  248.   -2.0f/9.0f,  8.0f/9.0f,      0.0f,        0.0f,  8.0f/9.0f,      0.0f,    2.0f/9.0f,  8.0f/9.0f,      0.0f,
  249.    4.0f/9.0f,  8.0f/9.0f,      0.0f,    6.0f/9.0f,  8.0f/9.0f,      0.0f,    8.0f/9.0f,  8.0f/9.0f,      0.0f,
  250.   -8.0f/9.0f, -8.0f/9.0f,  2.0f/9.0f,   -6.0f/9.0f, -8.0f/9.0f,  2.0f/9.0f,   -4.0f/9.0f, -8.0f/9.0f,  2.0f/9.0f,
  251.   -2.0f/9.0f, -8.0f/9.0f,  2.0f/9.0f,        0.0f, -8.0f/9.0f,  2.0f/9.0f,    2.0f/9.0f, -8.0f/9.0f,  2.0f/9.0f,
  252. 4.0f/9.0f, -8.0f/9.0f,  2.0f/9.0f,    6.0f/9.0f, -8.0f/9.0f,  2.0f/9.0f,    8.0f/9.0f, -8.0f/9.0f,  2.0f/9.0f,
  253.   -8.0f/9.0f, -6.0f/9.0f,  2.0f/9.0f,   -6.0f/9.0f, -6.0f/9.0f,  2.0f/9.0f,   -4.0f/9.0f, -6.0f/9.0f,  2.0f/9.0f,
  254.   -2.0f/9.0f, -6.0f/9.0f,  2.0f/9.0f,        0.0f, -6.0f/9.0f,  2.0f/9.0f,    2.0f/9.0f, -6.0f/9.0f,  2.0f/9.0f,
  255. 4.0f/9.0f, -6.0f/9.0f,  2.0f/9.0f,    6.0f/9.0f, -6.0f/9.0f,  2.0f/9.0f,    8.0f/9.0f, -6.0f/9.0f,  2.0f/9.0f,
  256.   -8.0f/9.0f, -4.0f/9.0f,  2.0f/9.0f,   -6.0f/9.0f, -4.0f/9.0f,  2.0f/9.0f,   -4.0f/9.0f, -4.0f/9.0f,  2.0f/9.0f,
  257.   -2.0f/9.0f, -4.0f/9.0f,  2.0f/9.0f,        0.0f, -4.0f/9.0f,  2.0f/9.0f,    2.0f/9.0f, -4.0f/9.0f,  2.0f/9.0f,
  258.    4.0f/9.0f, -4.0f/9.0f,  2.0f/9.0f,    6.0f/9.0f, -4.0f/9.0f,  2.0f/9.0f,    8.0f/9.0f, -4.0f/9.0f,  2.0f/9.0f,
  259.   -8.0f/9.0f, -2.0f/9.0f,  2.0f/9.0f,   -6.0f/9.0f, -2.0f/9.0f,  2.0f/9.0f,   -4.0f/9.0f, -2.0f/9.0f,  2.0f/9.0f,
  260.   -2.0f/9.0f, -2.0f/9.0f,  2.0f/9.0f,        0.0f, -2.0f/9.0f,  2.0f/9.0f,    2.0f/9.0f, -2.0f/9.0f,  2.0f/9.0f,
  261.    4.0f/9.0f, -2.0f/9.0f,  2.0f/9.0f,    6.0f/9.0f, -2.0f/9.0f,  2.0f/9.0f,    8.0f/9.0f, -2.0f/9.0f,  2.0f/9.0f,
  262.   -8.0f/9.0f,      0.0f,  2.0f/9.0f,   -6.0f/9.0f,      0.0f,  2.0f/9.0f,   -4.0f/9.0f,      0.0f,  2.0f/9.0f,
  263.   -2.0f/9.0f,      0.0f,  2.0f/9.0f,        0.0f,      0.0f,  2.0f/9.0f,    2.0f/9.0f,      0.0f,  2.0f/9.0f,
  264.    4.0f/9.0f,      0.0f,  2.0f/9.0f,    6.0f/9.0f,      0.0f,  2.0f/9.0f,    8.0f/9.0f,      0.0f,  2.0f/9.0f,
  265.   -8.0f/9.0f,  2.0f/9.0f,  2.0f/9.0f,   -6.0f/9.0f,  2.0f/9.0f,  2.0f/9.0f,   -4.0f/9.0f,  2.0f/9.0f,  2.0f/9.0f,
  266.   -2.0f/9.0f,  2.0f/9.0f,  2.0f/9.0f,        0.0f,  2.0f/9.0f,  2.0f/9.0f,    2.0f/9.0f,  2.0f/9.0f,  2.0f/9.0f,
  267.    4.0f/9.0f,  2.0f/9.0f,  2.0f/9.0f,    6.0f/9.0f,  2.0f/9.0f,  2.0f/9.0f,    8.0f/9.0f,  2.0f/9.0f,  2.0f/9.0f,
  268.   -8.0f/9.0f,  4.0f/9.0f,  2.0f/9.0f,   -6.0f/9.0f,  4.0f/9.0f,  2.0f/9.0f,   -4.0f/9.0f,  4.0f/9.0f,  2.0f/9.0f,
  269.   -2.0f/9.0f,  4.0f/9.0f,  2.0f/9.0f,        0.0f,  4.0f/9.0f,  2.0f/9.0f,    2.0f/9.0f,  4.0f/9.0f,  2.0f/9.0f,
  270. 4.0f/9.0f,  4.0f/9.0f,  2.0f/9.0f,    6.0f/9.0f,  4.0f/9.0f,  2.0f/9.0f,    8.0f/9.0f,  4.0f/9.0f,  2.0f/9.0f,
  271.   -8.0f/9.0f,  6.0f/9.0f,  2.0f/9.0f,   -6.0f/9.0f,  6.0f/9.0f,  2.0f/9.0f,   -4.0f/9.0f,  6.0f/9.0f,  2.0f/9.0f,
  272.   -2.0f/9.0f,  6.0f/9.0f,  2.0f/9.0f,        0.0f,  6.0f/9.0f,  2.0f/9.0f,    2.0f/9.0f,  6.0f/9.0f,  2.0f/9.0f,
  273.    4.0f/9.0f,  6.0f/9.0f,  2.0f/9.0f,    6.0f/9.0f,  6.0f/9.0f,  2.0f/9.0f,    8.0f/9.0f,  6.0f/9.0f,  2.0f/9.0f,
  274.   -8.0f/9.0f,  8.0f/9.0f,  2.0f/9.0f,   -6.0f/9.0f,  8.0f/9.0f,  2.0f/9.0f,   -4.0f/9.0f,  8.0f/9.0f,  2.0f/9.0f,
  275.   -2.0f/9.0f,  8.0f/9.0f,  2.0f/9.0f,        0.0f,  8.0f/9.0f,  2.0f/9.0f,    2.0f/9.0f,  8.0f/9.0f,  2.0f/9.0f,
  276.    4.0f/9.0f,  8.0f/9.0f,  2.0f/9.0f,    6.0f/9.0f,  8.0f/9.0f,  2.0f/9.0f,    8.0f/9.0f,  8.0f/9.0f,  2.0f/9.0f,
  277.   -8.0f/9.0f, -8.0f/9.0f,  4.0f/9.0f,   -6.0f/9.0f, -8.0f/9.0f,  4.0f/9.0f,   -4.0f/9.0f, -8.0f/9.0f,  4.0f/9.0f,
  278.   -2.0f/9.0f, -8.0f/9.0f,  4.0f/9.0f,        0.0f, -8.0f/9.0f,  4.0f/9.0f,    2.0f/9.0f, -8.0f/9.0f,  4.0f/9.0f,
  279. 4.0f/9.0f, -8.0f/9.0f,  4.0f/9.0f,    6.0f/9.0f, -8.0f/9.0f,  4.0f/9.0f,    8.0f/9.0f, -8.0f/9.0f,  4.0f/9.0f,
  280.   -8.0f/9.0f, -6.0f/9.0f,  4.0f/9.0f,   -6.0f/9.0f, -6.0f/9.0f,  4.0f/9.0f,   -4.0f/9.0f, -6.0f/9.0f,  4.0f/9.0f,
  281.   -2.0f/9.0f, -6.0f/9.0f,  4.0f/9.0f,        0.0f, -6.0f/9.0f,  4.0f/9.0f,    2.0f/9.0f, -6.0f/9.0f,  4.0f/9.0f,
  282.    4.0f/9.0f, -6.0f/9.0f,  4.0f/9.0f,    6.0f/9.0f, -6.0f/9.0f,  4.0f/9.0f,    8.0f/9.0f, -6.0f/9.0f,  4.0f/9.0f,
  283.   -8.0f/9.0f, -4.0f/9.0f,  4.0f/9.0f,   -6.0f/9.0f, -4.0f/9.0f,  4.0f/9.0f,   -4.0f/9.0f, -4.0f/9.0f,  4.0f/9.0f,
  284.   -2.0f/9.0f, -4.0f/9.0f,  4.0f/9.0f,        0.0f, -4.0f/9.0f,  4.0f/9.0f,    2.0f/9.0f, -4.0f/9.0f,  4.0f/9.0f,
  285.    4.0f/9.0f, -4.0f/9.0f,  4.0f/9.0f,    6.0f/9.0f, -4.0f/9.0f,  4.0f/9.0f,    8.0f/9.0f, -4.0f/9.0f,  4.0f/9.0f,
  286.   -8.0f/9.0f, -2.0f/9.0f,  4.0f/9.0f,   -6.0f/9.0f, -2.0f/9.0f,  4.0f/9.0f,   -4.0f/9.0f, -2.0f/9.0f,  4.0f/9.0f,
  287.   -2.0f/9.0f, -2.0f/9.0f,  4.0f/9.0f,        0.0f, -2.0f/9.0f,  4.0f/9.0f,    2.0f/9.0f, -2.0f/9.0f,  4.0f/9.0f,
  288. 4.0f/9.0f, -2.0f/9.0f,  4.0f/9.0f,    6.0f/9.0f, -2.0f/9.0f,  4.0f/9.0f,    8.0f/9.0f, -2.0f/9.0f,  4.0f/9.0f,
  289.   -8.0f/9.0f,      0.0f,  4.0f/9.0f,   -6.0f/9.0f,      0.0f,  4.0f/9.0f,   -4.0f/9.0f,      0.0f,  4.0f/9.0f,
  290.   -2.0f/9.0f,      0.0f,  4.0f/9.0f,        0.0f,      0.0f,  4.0f/9.0f,    2.0f/9.0f,      0.0f,  4.0f/9.0f,
  291.    4.0f/9.0f,      0.0f,  4.0f/9.0f,    6.0f/9.0f,      0.0f,  4.0f/9.0f,    8.0f/9.0f,      0.0f,  4.0f/9.0f,
  292.   -8.0f/9.0f,  2.0f/9.0f,  4.0f/9.0f,   -6.0f/9.0f,  2.0f/9.0f,  4.0f/9.0f,   -4.0f/9.0f,  2.0f/9.0f,  4.0f/9.0f,
  293.   -2.0f/9.0f,  2.0f/9.0f,  4.0f/9.0f,        0.0f,  2.0f/9.0f,  4.0f/9.0f,    2.0f/9.0f,  2.0f/9.0f,  4.0f/9.0f,
  294.    4.0f/9.0f,  2.0f/9.0f,  4.0f/9.0f,    6.0f/9.0f,  2.0f/9.0f,  4.0f/9.0f,    8.0f/9.0f,  2.0f/9.0f,  4.0f/9.0f,
  295.   -8.0f/9.0f,  4.0f/9.0f,  4.0f/9.0f,   -6.0f/9.0f,  4.0f/9.0f,  4.0f/9.0f,   -4.0f/9.0f,  4.0f/9.0f,  4.0f/9.0f,
  296.   -2.0f/9.0f,  4.0f/9.0f,  4.0f/9.0f,        0.0f,  4.0f/9.0f,  4.0f/9.0f,    2.0f/9.0f,  4.0f/9.0f,  4.0f/9.0f,
  297.    4.0f/9.0f,  4.0f/9.0f,  4.0f/9.0f,    6.0f/9.0f,  4.0f/9.0f,  4.0f/9.0f,    8.0f/9.0f,  4.0f/9.0f,  4.0f/9.0f,
  298.   -8.0f/9.0f,  6.0f/9.0f,  4.0f/9.0f,   -6.0f/9.0f,  6.0f/9.0f,  4.0f/9.0f,   -4.0f/9.0f,  6.0f/9.0f,  4.0f/9.0f,
  299.   -2.0f/9.0f,  6.0f/9.0f,  4.0f/9.0f,        0.0f,  6.0f/9.0f,  4.0f/9.0f,    2.0f/9.0f,  6.0f/9.0f,  4.0f/9.0f,
  300. 4.0f/9.0f,  6.0f/9.0f,  4.0f/9.0f,    6.0f/9.0f,  6.0f/9.0f,  4.0f/9.0f,    8.0f/9.0f,  6.0f/9.0f,  4.0f/9.0f,
  301.   -8.0f/9.0f,  8.0f/9.0f,  4.0f/9.0f,   -6.0f/9.0f,  8.0f/9.0f,  4.0f/9.0f,   -4.0f/9.0f,  8.0f/9.0f,  4.0f/9.0f,
  302.   -2.0f/9.0f,  8.0f/9.0f,  4.0f/9.0f,        0.0f,  8.0f/9.0f,  4.0f/9.0f,    2.0f/9.0f,  8.0f/9.0f,  4.0f/9.0f,
  303. 4.0f/9.0f,  8.0f/9.0f,  4.0f/9.0f,    6.0f/9.0f,  8.0f/9.0f,  4.0f/9.0f,    8.0f/9.0f,  8.0f/9.0f,  4.0f/9.0f,
  304.   -8.0f/9.0f, -8.0f/9.0f,  6.0f/9.0f,   -6.0f/9.0f, -8.0f/9.0f,  6.0f/9.0f,   -4.0f/9.0f, -8.0f/9.0f,  6.0f/9.0f,
  305.   -2.0f/9.0f, -8.0f/9.0f,  6.0f/9.0f,        0.0f, -8.0f/9.0f,  6.0f/9.0f,    2.0f/9.0f, -8.0f/9.0f,  6.0f/9.0f,
  306.    4.0f/9.0f, -8.0f/9.0f,  6.0f/9.0f,    6.0f/9.0f, -8.0f/9.0f,  6.0f/9.0f,    8.0f/9.0f, -8.0f/9.0f,  6.0f/9.0f,
  307.   -8.0f/9.0f, -6.0f/9.0f,  6.0f/9.0f,   -6.0f/9.0f, -6.0f/9.0f,  6.0f/9.0f,   -4.0f/9.0f, -6.0f/9.0f,  6.0f/9.0f,
  308.   -2.0f/9.0f, -6.0f/9.0f,  6.0f/9.0f,        0.0f, -6.0f/9.0f,  6.0f/9.0f,    2.0f/9.0f, -6.0f/9.0f,  6.0f/9.0f,
  309.    4.0f/9.0f, -6.0f/9.0f,  6.0f/9.0f,    6.0f/9.0f, -6.0f/9.0f,  6.0f/9.0f,    8.0f/9.0f, -6.0f/9.0f,  6.0f/9.0f,
  310.   -8.0f/9.0f, -4.0f/9.0f,  6.0f/9.0f,   -6.0f/9.0f, -4.0f/9.0f,  6.0f/9.0f,   -4.0f/9.0f, -4.0f/9.0f,  6.0f/9.0f,
  311.   -2.0f/9.0f, -4.0f/9.0f,  6.0f/9.0f,        0.0f, -4.0f/9.0f,  6.0f/9.0f,    2.0f/9.0f, -4.0f/9.0f,  6.0f/9.0f,
  312. 4.0f/9.0f, -4.0f/9.0f,  6.0f/9.0f,    6.0f/9.0f, -4.0f/9.0f,  6.0f/9.0f,    8.0f/9.0f, -4.0f/9.0f,  6.0f/9.0f,
  313.   -8.0f/9.0f, -2.0f/9.0f,  6.0f/9.0f,   -6.0f/9.0f, -2.0f/9.0f,  6.0f/9.0f,   -4.0f/9.0f, -2.0f/9.0f,  6.0f/9.0f,
  314.   -2.0f/9.0f, -2.0f/9.0f,  6.0f/9.0f,        0.0f, -2.0f/9.0f,  6.0f/9.0f,    2.0f/9.0f, -2.0f/9.0f,  6.0f/9.0f,
  315.    4.0f/9.0f, -2.0f/9.0f,  6.0f/9.0f,    6.0f/9.0f, -2.0f/9.0f,  6.0f/9.0f,    8.0f/9.0f, -2.0f/9.0f,  6.0f/9.0f,
  316.   -8.0f/9.0f,      0.0f,  6.0f/9.0f,   -6.0f/9.0f,      0.0f,  6.0f/9.0f,   -4.0f/9.0f,      0.0f,  6.0f/9.0f,
  317.   -2.0f/9.0f,      0.0f,  6.0f/9.0f,        0.0f,      0.0f,  6.0f/9.0f,    2.0f/9.0f,      0.0f,  6.0f/9.0f,
  318. 4.0f/9.0f,      0.0f,  6.0f/9.0f,    6.0f/9.0f,      0.0f,  6.0f/9.0f,    8.0f/9.0f,      0.0f,  6.0f/9.0f,
  319.   -8.0f/9.0f,  2.0f/9.0f,  6.0f/9.0f,   -6.0f/9.0f,  2.0f/9.0f,  6.0f/9.0f,   -4.0f/9.0f,  2.0f/9.0f,  6.0f/9.0f,
  320.   -2.0f/9.0f,  2.0f/9.0f,  6.0f/9.0f,        0.0f,  2.0f/9.0f,  6.0f/9.0f,    2.0f/9.0f,  2.0f/9.0f,  6.0f/9.0f,
  321. 4.0f/9.0f,  2.0f/9.0f,  6.0f/9.0f,    6.0f/9.0f,  2.0f/9.0f,  6.0f/9.0f,    8.0f/9.0f,  2.0f/9.0f,  6.0f/9.0f,
  322.   -8.0f/9.0f,  4.0f/9.0f,  6.0f/9.0f,   -6.0f/9.0f,  4.0f/9.0f,  6.0f/9.0f,   -4.0f/9.0f,  4.0f/9.0f,  6.0f/9.0f,
  323.   -2.0f/9.0f,  4.0f/9.0f,  6.0f/9.0f,        0.0f,  4.0f/9.0f,  6.0f/9.0f,    2.0f/9.0f,  4.0f/9.0f,  6.0f/9.0f,
  324. 4.0f/9.0f,  4.0f/9.0f,  6.0f/9.0f,    6.0f/9.0f,  4.0f/9.0f,  6.0f/9.0f,    8.0f/9.0f,  4.0f/9.0f,  6.0f/9.0f,
  325.   -8.0f/9.0f,  6.0f/9.0f,  6.0f/9.0f,   -6.0f/9.0f,  6.0f/9.0f,  6.0f/9.0f,   -4.0f/9.0f,  6.0f/9.0f,  6.0f/9.0f,
  326.   -2.0f/9.0f,  6.0f/9.0f,  6.0f/9.0f,        0.0f,  6.0f/9.0f,  6.0f/9.0f,    2.0f/9.0f,  6.0f/9.0f,  6.0f/9.0f,
  327. 4.0f/9.0f,  6.0f/9.0f,  6.0f/9.0f,    6.0f/9.0f,  6.0f/9.0f,  6.0f/9.0f,    8.0f/9.0f,  6.0f/9.0f,  6.0f/9.0f,
  328.   -8.0f/9.0f,  8.0f/9.0f,  6.0f/9.0f,   -6.0f/9.0f,  8.0f/9.0f,  6.0f/9.0f,   -4.0f/9.0f,  8.0f/9.0f,  6.0f/9.0f,
  329.   -2.0f/9.0f,  8.0f/9.0f,  6.0f/9.0f,        0.0f,  8.0f/9.0f,  6.0f/9.0f,    2.0f/9.0f,  8.0f/9.0f,  6.0f/9.0f,
  330. 4.0f/9.0f,  8.0f/9.0f,  6.0f/9.0f,    6.0f/9.0f,  8.0f/9.0f,  6.0f/9.0f,    8.0f/9.0f,  8.0f/9.0f,  6.0f/9.0f,
  331.   -8.0f/9.0f, -8.0f/9.0f,  8.0f/9.0f,   -6.0f/9.0f, -8.0f/9.0f,  8.0f/9.0f,   -4.0f/9.0f, -8.0f/9.0f,  8.0f/9.0f,
  332.   -2.0f/9.0f, -8.0f/9.0f,  8.0f/9.0f,        0.0f, -8.0f/9.0f,  8.0f/9.0f,    2.0f/9.0f, -8.0f/9.0f,  8.0f/9.0f,
  333.    4.0f/9.0f, -8.0f/9.0f,  8.0f/9.0f,    6.0f/9.0f, -8.0f/9.0f,  8.0f/9.0f,    8.0f/9.0f, -8.0f/9.0f,  8.0f/9.0f,
  334.   -8.0f/9.0f, -6.0f/9.0f,  8.0f/9.0f,   -6.0f/9.0f, -6.0f/9.0f,  8.0f/9.0f,   -4.0f/9.0f, -6.0f/9.0f,  8.0f/9.0f,
  335.   -2.0f/9.0f, -6.0f/9.0f,  8.0f/9.0f,        0.0f, -6.0f/9.0f,  8.0f/9.0f,    2.0f/9.0f, -6.0f/9.0f,  8.0f/9.0f,
  336. 4.0f/9.0f, -6.0f/9.0f,  8.0f/9.0f,    6.0f/9.0f, -6.0f/9.0f,  8.0f/9.0f,    8.0f/9.0f, -6.0f/9.0f,  8.0f/9.0f,
  337.   -8.0f/9.0f, -4.0f/9.0f,  8.0f/9.0f,   -6.0f/9.0f, -4.0f/9.0f,  8.0f/9.0f,   -4.0f/9.0f, -4.0f/9.0f,  8.0f/9.0f,
  338.   -2.0f/9.0f, -4.0f/9.0f,  8.0f/9.0f,        0.0f, -4.0f/9.0f,  8.0f/9.0f,    2.0f/9.0f, -4.0f/9.0f,  8.0f/9.0f,
  339.    4.0f/9.0f, -4.0f/9.0f,  8.0f/9.0f,    6.0f/9.0f, -4.0f/9.0f,  8.0f/9.0f,    8.0f/9.0f, -4.0f/9.0f,  8.0f/9.0f,
  340.   -8.0f/9.0f, -2.0f/9.0f,  8.0f/9.0f,   -6.0f/9.0f, -2.0f/9.0f,  8.0f/9.0f,   -4.0f/9.0f, -2.0f/9.0f,  8.0f/9.0f,
  341.   -2.0f/9.0f, -2.0f/9.0f,  8.0f/9.0f,        0.0f, -2.0f/9.0f,  8.0f/9.0f,    2.0f/9.0f, -2.0f/9.0f,  8.0f/9.0f,
  342.    4.0f/9.0f, -2.0f/9.0f,  8.0f/9.0f,    6.0f/9.0f, -2.0f/9.0f,  8.0f/9.0f,    8.0f/9.0f, -2.0f/9.0f,  8.0f/9.0f,
  343.   -8.0f/9.0f,      0.0f,  8.0f/9.0f,   -6.0f/9.0f,      0.0f,  8.0f/9.0f,   -4.0f/9.0f,      0.0f,  8.0f/9.0f,
  344.   -2.0f/9.0f,      0.0f,  8.0f/9.0f,        0.0f,      0.0f,  8.0f/9.0f,    2.0f/9.0f,      0.0f,  8.0f/9.0f,
  345.    4.0f/9.0f,      0.0f,  8.0f/9.0f,    6.0f/9.0f,      0.0f,  8.0f/9.0f,    8.0f/9.0f,      0.0f,  8.0f/9.0f,
  346.   -8.0f/9.0f,  2.0f/9.0f,  8.0f/9.0f,   -6.0f/9.0f,  2.0f/9.0f,  8.0f/9.0f,   -4.0f/9.0f,  2.0f/9.0f,  8.0f/9.0f,
  347.   -2.0f/9.0f,  2.0f/9.0f,  8.0f/9.0f,        0.0f,  2.0f/9.0f,  8.0f/9.0f,    2.0f/9.0f,  2.0f/9.0f,  8.0f/9.0f,
  348. 4.0f/9.0f,  2.0f/9.0f,  8.0f/9.0f,    6.0f/9.0f,  2.0f/9.0f,  8.0f/9.0f,    8.0f/9.0f,  2.0f/9.0f,  8.0f/9.0f,
  349.   -8.0f/9.0f,  4.0f/9.0f,  8.0f/9.0f,   -6.0f/9.0f,  4.0f/9.0f,  8.0f/9.0f,   -4.0f/9.0f,  4.0f/9.0f,  8.0f/9.0f,
  350.   -2.0f/9.0f,  4.0f/9.0f,  8.0f/9.0f,        0.0f,  4.0f/9.0f,  8.0f/9.0f,    2.0f/9.0f,  4.0f/9.0f,  8.0f/9.0f,
  351. 4.0f/9.0f,  4.0f/9.0f,  8.0f/9.0f,    6.0f/9.0f,  4.0f/9.0f,  8.0f/9.0f,    8.0f/9.0f,  4.0f/9.0f,  8.0f/9.0f,
  352.   -8.0f/9.0f,  6.0f/9.0f,  8.0f/9.0f,   -6.0f/9.0f,  6.0f/9.0f,  8.0f/9.0f,   -4.0f/9.0f,  6.0f/9.0f,  8.0f/9.0f,
  353.   -2.0f/9.0f,  6.0f/9.0f,  8.0f/9.0f,        0.0f,  6.0f/9.0f,  8.0f/9.0f,    2.0f/9.0f,  6.0f/9.0f,  8.0f/9.0f,
  354.    4.0f/9.0f,  6.0f/9.0f,  8.0f/9.0f,    6.0f/9.0f,  6.0f/9.0f,  8.0f/9.0f,    8.0f/9.0f,  6.0f/9.0f,  8.0f/9.0f,
  355.   -8.0f/9.0f,  8.0f/9.0f,  8.0f/9.0f,   -6.0f/9.0f,  8.0f/9.0f,  8.0f/9.0f,   -4.0f/9.0f,  8.0f/9.0f,  8.0f/9.0f,
  356.   -2.0f/9.0f,  8.0f/9.0f,  8.0f/9.0f,        0.0f,  8.0f/9.0f,  8.0f/9.0f,    2.0f/9.0f,  8.0f/9.0f,  8.0f/9.0f,
  357.    4.0f/9.0f,  8.0f/9.0f,  8.0f/9.0f,    6.0f/9.0f,  8.0f/9.0f,  8.0f/9.0f,    8.0f/9.0f,  8.0f/9.0f,  8.0f/9.0f
  358. };
  361. // data taken from ISO/IEC DIS 11172, Annexes 3-B.2[abcd] and 3-B.4:
  363. // subbands 0-2 in tables 3-B.2a and 2b: (index is allocation)
  364. static const uint32 table_ab1_codelength[16] =
  365.   // bits per codeword
  366. { 0, 5, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16 };
  368. static const real *table_ab1_groupingtables[16] =
  369.   // pointer to sample grouping table, or NULL-pointer if ungrouped
  370. { 0, grouping_5bits, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
  372. static const real table_ab1_factor[16] =
  373.   // factor for requantization: (real)sample * factor - 1.0 gives requantized sample
  374. { 0.0f, 1.0f/2.0f, 1.0f/4.0f, 1.0f/8.0f, 1.0f/16.0f, 1.0f/32.0f, 1.0f/64.0f,
  375.   1.0f/128.0f, 1.0f/256.0f, 1.0f/512.0f, 1.0f/1024.0f, 1.0f/2048.0f,
  376.   1.0f/4096.0f, 1.0f/8192.0f, 1.0f/16384.0f, 1.0f/32768.0f };
  378. static const real table_ab1_c[16] =
  379.   // factor c for requantization from table 3-B.4
  380. { 0.0f,           1.33333333333f, 1.14285714286f, 1.06666666666f, 1.03225806452f,
  381.   1.01587301587f, 1.00787401575f, 1.00392156863f, 1.00195694716f, 1.00097751711f,
  382.   1.00048851979f, 1.00024420024f, 1.00012208522f, 1.00006103888f, 1.00003051851f,
  383.   1.00001525902f };
  384. static const real table_ab1_d[16] =
  385.   // addend d for requantization from table 3-B.4
  386. { 0.0f,           0.50000000000f, 0.25000000000f, 0.12500000000f, 0.06250000000f,
  387.   0.03125000000f, 0.01562500000f, 0.00781250000f, 0.00390625000f, 0.00195312500f,
  388.   0.00097656250f, 0.00048828125f, 0.00024414063f, 0.00012207031f, 0.00006103516f,
  389.   0.00003051758f };
  391. // subbands 3-... tables 3-B.2a and 2b:
  392. static const real *table_ab234_groupingtables[16] =
  393. { 0, grouping_5bits, grouping_7bits, 0, grouping_10bits, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
  395. // subbands 3-10 in tables 3-B.2a and 2b:
  396. static const uint32 table_ab2_codelength[16] =
  397. { 0, 5, 7, 3, 10, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 16 };
  398. static const real table_ab2_factor[16] =
  399. { 0.0f, 1.0f/2.0f, 1.0f/4.0f, 1.0f/4.0f, 1.0f/8.0f, 1.0f/8.0f, 1.0f/16.0f,
  400.   1.0f/32.0f, 1.0f/64.0f, 1.0f/128.0f, 1.0f/256.0f, 1.0f/512.0f,
  401.   1.0f/1024.0f, 1.0f/2048.0f, 1.0f/4096.0f, 1.0f/32768.0f };
  402. static const real table_ab2_c[16] =
  403. { 0.0f,           1.33333333333f, 1.60000000000f, 1.14285714286f, 1.77777777777f,
  404.   1.06666666666f, 1.03225806452f, 1.01587301587f, 1.00787401575f, 1.00392156863f,
  405.   1.00195694716f, 1.00097751711f, 1.00048851979f, 1.00024420024f, 1.00012208522f,
  406.   1.00001525902f };
  407. static const real table_ab2_d[16] =
  408. { 0.0f,           0.50000000000f, 0.50000000000f, 0.25000000000f, 0.50000000000f,
  409.   0.12500000000f, 0.06250000000f, 0.03125000000f, 0.01562500000f, 0.00781250000f,
  410.   0.00390625000f, 0.00195312500f, 0.00097656250f, 0.00048828125f, 0.00024414063f,
  411.   0.00003051758f };
  413. // subbands 11-22 in tables 3-B.2a and 2b:
  414. static const uint32 table_ab3_codelength[8] = { 0, 5, 7, 3, 10, 4, 5, 16 };
  415. static const real table_ab3_factor[8] =
  416. { 0.0f, 1.0f/2.0f, 1.0f/4.0f, 1.0f/4.0f, 1.0f/8.0f, 1.0f/8.0f, 1.0f/16.0f, 1.0f/32768.0f };
  417. static const real table_ab3_c[8] =
  418. { 0.0f,           1.33333333333f, 1.60000000000f, 1.14285714286f, 1.77777777777f,
  419.   1.06666666666f, 1.03225806452f, 1.00001525902f };
  420. static const real table_ab3_d[8] =
  421. { 0.0f,           0.50000000000f, 0.50000000000f, 0.25000000000f, 0.50000000000f,
  422.   0.12500000000f, 0.06250000000f, 0.00003051758f };
  424. // subbands 23-... in tables 3-B.2a and 2b:
  425. static const uint32 table_ab4_codelength[4] = { 0, 5, 7, 16 };
  426. static const real table_ab4_factor[8] = { 0.0f, 1.0f/2.0f, 1.0f/4.0f, 1.0f/32768.0f };
  427. static const real table_ab4_c[4] = { 0.0f, 1.33333333333f, 1.60000000000f, 1.00001525902f };
  428. static const real table_ab4_d[4] = { 0.0f, 0.50000000000f, 0.50000000000f, 0.00003051758f };
  430. // subbands in tables 3-B.2c and 2d:
  431. static const uint32 table_cd_codelength[16] =
  432. { 0, 5, 7, 10, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 };
  433. static const real *table_cd_groupingtables[16] =
  434. { 0, grouping_5bits, grouping_7bits, grouping_10bits, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
  435. static const real table_cd_factor[16] =
  436. { 0.0f, 1.0f/2.0f, 1.0f/4.0f, 1.0f/8.0f, 1.0f/8.0f, 1.0f/16.0f, 1.0f/32.0f, 1.0f/64.0f,
  437.   1.0f/128.0f, 1.0f/256.0f, 1.0f/512.0f, 1.0f/1024.0f, 1.0f/2048.0f, 1.0f/4096.0f,
  438.   1.0f/8192.0f, 1.0f/16384.0f };
  439. static const real table_cd_c[16] =
  440. { 0.0f,           1.33333333333f, 1.60000000000f, 1.77777777777f, 1.06666666666f,
  441.   1.03225806452f, 1.01587301587f, 1.00787401575f, 1.00392156863f, 1.00195694716f,
  442.   1.00097751711f, 1.00048851979f, 1.00024420024f, 1.00012208522f, 1.00006103888f,
  443.   1.00003051851f };
  444. static const real table_cd_d[16] =
  445. { 0.0f,           0.50000000000f, 0.50000000000f, 0.50000000000f, 0.12500000000f,
  446.   0.06250000000f, 0.03125000000f, 0.01562500000f, 0.00781250000f, 0.00390625000f,
  447.   0.00195312500f, 0.00097656250f, 0.00048828125f, 0.00024414063f, 0.00012207031f,
  448.   0.00006103516f };
  452. /**********************/ // used for single channel mode
  453. /*** Standard Class ***/ // and in derived class for intensity
  454. /**********************/ // stereo mode
  456. SubbandLayer2::SubbandLayer2(uint32 subbandnumber)
  457. {
  458.   this->subbandnumber = subbandnumber;
  459.   groupnumber = samplenumber = 0;
  460. }
  463. uint32 SubbandLayer2::get_allocationlength(Header *header)
  464. {
  466.   if (header->version() == MPEG1) {
  468.   uint32 channel_bitrate = header->bitrate_index();
  470.   // calculate bitrate per channel:
  471.   if (header->mode() != single_channel)
  472.  if (channel_bitrate == 4)
  473. channel_bitrate = 1;
  474.  else
  475. channel_bitrate -= 4;
  477.   if (channel_bitrate == 1 || channel_bitrate == 2)
  478.  // table 3-B.2c or 3-B.2d
  479.  if (subbandnumber <= 1)
  480. return 4;
  481.  else
  482. return 3;
  483.   else
  484.  // tables 3-B.2a or 3-B.2b
  485.  if (subbandnumber <= 10)
  486. return 4;
  487.  else if (subbandnumber <= 22)
  488. return 3;
  489.  else
  490. return 2;
  492.   } else { // MPEG-2 LSF -- Jeff
  494.   // table B.1 of ISO/IEC 13818-3
  495.      if (subbandnumber <= 3)
  496.       return 4;
  497.      else if (subbandnumber <= 10)
  498.       return 3;
  499.      else
  500.       return 2;
  501.   }
  503. }
  505. void SubbandLayer2::prepare_sample_reading(Header *header, uint32 allocation,
  506.    const real **groupingtable,
  507.                                            real *factor, uint32 *codelength,
  508.                                            real *c, real *d)
  509. {
  510.   uint32 channel_bitrate = header->bitrate_index();
  512.   // calculate bitrate per channel:
  513.   if (header->mode() != single_channel)
  514.  if (channel_bitrate == 4)
  515. channel_bitrate = 1;
  516.  else
  517. channel_bitrate -= 4;
  519.   if (channel_bitrate == 1 || channel_bitrate == 2)
  520.   {
  521.  // table 3-B.2c or 3-B.2d
  522.  *groupingtable = table_cd_groupingtables[allocation];
  523.  *factor = table_cd_factor[allocation];
  524.  *codelength = table_cd_codelength[allocation];
  525.  *c = table_cd_c[allocation];
  526.  *d = table_cd_d[allocation];
  527.   }
  528.   else
  529.   {
  530.  // tables 3-B.2a or 3-B.2b
  531.  if (subbandnumber <= 2)
  532.  {
  533. *groupingtable = table_ab1_groupingtables[allocation];
  534. *factor = table_ab1_factor[allocation];
  535. *codelength = table_ab1_codelength[allocation];
  536.       *c = table_ab1_c[allocation];
  537.       *d = table_ab1_d[allocation];
  538.     }
  539.  else
  540.  {
  541.       *groupingtable = table_ab234_groupingtables[allocation];
  542. if (subbandnumber <= 10)
  543. {
  544. *factor = table_ab2_factor[allocation];
  545. *codelength = table_ab2_codelength[allocation];
  546. *c = table_ab2_c[allocation];
  547. *d = table_ab2_d[allocation];
  548.       }
  549.       else if (subbandnumber <= 22)
  550.       {
  551. *factor = table_ab3_factor[allocation];
  552. *codelength = table_ab3_codelength[allocation];
  553. *c = table_ab3_c[allocation];
  554. *d = table_ab3_d[allocation];
  555.       }
  556. else
  557.       {
  558. *factor = table_ab4_factor[allocation];
  559. *codelength = table_ab4_codelength[allocation];
  560. *c = table_ab4_c[allocation];
  561. *d = table_ab4_d[allocation];
  562.       }
  563.     }
  564.   }
  565. }
  568. void SubbandLayer2::read_allocation(Ibitstream *stream, Header *header, Crc16 *crc)
  569. {
  570.   register uint32 length = get_allocationlength(header);
  571.   allocation = stream->get_bits(length);
  572.   if (crc)
  573.     crc->add_bits(allocation, length);
  574. }
  577. void SubbandLayer2::read_scalefactor_selection(Ibitstream *stream, Crc16 *crc)
  578. {
  579.   if (allocation)
  580.   {
  581.     scfsi = stream->get_bits(2);
  582.     if (crc)
  583. crc->add_bits(scfsi, 2);
  584.   }
  585. }
  588. void SubbandLayer2::read_scalefactor(Ibitstream *stream, Header *header)
  589. {
  590.   if (allocation)
  591.   {
  592.     switch (scfsi)
  593.     {
  594.       case 0:
  595.       scalefactor1 = scalefactors[stream->get_bits(6)];
  596.    scalefactor2 = scalefactors[stream->get_bits(6)];
  597.    scalefactor3 = scalefactors[stream->get_bits(6)];
  598.    break;
  600. case 1:
  601.    scalefactor1 = scalefactor2 = scalefactors[stream->get_bits(6)];
  602.    scalefactor3 = scalefactors[stream->get_bits(6)];
  603.    break;
  604.       case 2:
  605.    scalefactor1 = scalefactor2 = scalefactor3 =
  606.            scalefactors[stream->get_bits(6)];
  607. break;
  609. case 3:
  610.    scalefactor1 = scalefactors[stream->get_bits(6)];
  611.    scalefactor2 = scalefactor3 = scalefactors[stream->get_bits(6)];
  612.    break;
  613.     }
  614.     prepare_sample_reading(header, allocation, &groupingtable,
  615.     &factor, &codelength, &c, &d);
  616.   }
  617. }
  620. bool SubbandLayer2::read_sampledata(Ibitstream *stream)
  621. {
  622.   if (allocation)
  623.  if (groupingtable)
  624.  {
  625. uint32 samplecode = stream->get_bits(codelength);
  626. // create requantized samples:
  627. samplecode += samplecode << 1;
  628. register real *target = samples;
  629. register const real *source = groupingtable + samplecode;
  630. *target++ = *source++;
  631. *target++ = *source++;
  632. *target = *source;
  633. // memcpy (samples, groupingtable + samplecode, 3 * sizeof (real));
  634.  }
  635.  else
  636.  {
  637. samples[0] = real (stream->get_bits(codelength)) * factor - 1.0f;
  638. samples[1] = real (stream->get_bits(codelength)) * factor - 1.0f;
  639. samples[2] = real (stream->get_bits(codelength)) * factor - 1.0f;
  640.  }
  642.   samplenumber = 0;
  643.   if (++groupnumber == 12)
  644.  return true;
  645.   else
  646.  return false;
  647. }
  650. bool SubbandLayer2::put_next_sample (e_channels channels,
  651.  SynthesisFilter *filter1,
  652.                                      SynthesisFilter *)
  653. {
  654.   if (allocation && channels != right)
  655.   {
  656.  register real sample = samples[samplenumber];
  658.  if (!groupingtable)
  659. sample = (sample + d) * c;
  660.  if (groupnumber <= 4)
  661. sample *= scalefactor1;
  662.  else if (groupnumber <= 8)
  663. sample *= scalefactor2;
  664.  else
  665. sample *= scalefactor3;
  666.  filter1->input_sample(sample, subbandnumber);
  667.   }
  669.   if (++samplenumber == 3)
  670.  return true;
  671.   else
  672.  return false;
  673. }
  677. /******************************/
  678. /*** Intensity Stereo Class ***/
  679. /******************************/
  681. SubbandLayer2IntensityStereo::SubbandLayer2IntensityStereo(uint32 subbandnumber)
  682. : SubbandLayer2(subbandnumber)
  683. {
  684. }
  687. void SubbandLayer2IntensityStereo::read_scalefactor_selection(Ibitstream *stream,
  688.   Crc16 *crc)
  689. {
  690.   if (allocation)
  691.   {
  692.  scfsi = stream->get_bits(2);
  693.  channel2_scfsi = stream->get_bits(2);
  694.  if (crc)
  695.  {
  696. crc->add_bits(scfsi, 2);
  697. crc->add_bits(channel2_scfsi, 2);
  698.  }
  699.   }
  700. }
  703. void SubbandLayer2IntensityStereo::read_scalefactor(Ibitstream *stream, Header *header)
  704. {
  705.   if (allocation)
  706.   {
  707.  SubbandLayer2::read_scalefactor(stream, header);
  708.  switch (channel2_scfsi)
  709.  {
  710. case 0:
  711. channel2_scalefactor1 = scalefactors[stream->get_bits(6)];
  712. channel2_scalefactor2 = scalefactors[stream->get_bits(6)];
  713. channel2_scalefactor3 = scalefactors[stream->get_bits(6)];
  714. break;
  716. case 1:
  717. channel2_scalefactor1 = channel2_scalefactor2 = scalefactors[stream->get_bits (6)];
  718. channel2_scalefactor3 = scalefactors[stream->get_bits(6)];
  719. break;
  721. case 2:
  722. channel2_scalefactor1 = channel2_scalefactor2 =
  723. channel2_scalefactor3 = scalefactors[stream->get_bits(6)];
  724. break;
  726. case 3:
  727. channel2_scalefactor1 = scalefactors[stream->get_bits(6)];
  728. channel2_scalefactor2 = channel2_scalefactor3 = scalefactors[stream->get_bits (6)];
  729. break;
  730.  }
  731.   }
  732. }
  735. bool SubbandLayer2IntensityStereo::put_next_sample (e_channels channels,
  736. SynthesisFilter *filter1, SynthesisFilter *filter2)
  737. {
  738.   if (allocation)
  739.   {
  740.  register real sample = samples[samplenumber];
  742.  if (!groupingtable)
  743. sample = (sample + d) * c;
  744.     if (channels == both)
  745.     {
  746. register float sample2 = sample;
  747.       if (groupnumber <= 4)
  748.       {
  749. sample *= scalefactor1;
  750. sample2 *= channel2_scalefactor1;
  751. }
  752. else if (groupnumber <= 8)
  753. {
  754. sample *= scalefactor2;
  755. sample2 *= channel2_scalefactor2;
  756. }
  757. else
  758. {
  759. sample *= scalefactor3;
  760. sample2 *= channel2_scalefactor3;
  761. }
  762. filter1->input_sample(sample, subbandnumber);
  763.       filter2->input_sample(sample2, subbandnumber);
  764.     }
  765.     else if (channels == left)
  766.  {
  767. if (groupnumber <= 4)
  768. sample *= scalefactor1;
  769.       else if (groupnumber <= 8)
  770. sample *= scalefactor2;
  771. else
  772. sample *= scalefactor3;
  773. filter1->input_sample(sample, subbandnumber);
  774.  }
  775.  else
  776.  {
  777. if (groupnumber <= 4)
  778. sample *= channel2_scalefactor1;
  779. else if (groupnumber <= 8)
  780. sample *= channel2_scalefactor2;
  781. else
  782. sample *= channel2_scalefactor3;
  783. filter1->input_sample(sample, subbandnumber);
  784.  }
  785.   }
  787.   if (++samplenumber == 3)
  788.  return true;
  789.   else
  790.  return false;
  791. }
  795. /********************/
  796. /*** Stereo Class ***/
  797. /********************/
  799. SubbandLayer2Stereo::SubbandLayer2Stereo(uint32 subbandnumber)
  800. : SubbandLayer2(subbandnumber)
  801. {
  802. }
  805. void SubbandLayer2Stereo::read_allocation(Ibitstream *stream, Header *header, Crc16 *crc)
  806. {
  807.   uint32 length = get_allocationlength(header);
  808.   allocation = stream->get_bits(length);
  809.   channel2_allocation = stream->get_bits(length);
  810.   if (crc)
  811.   {
  812.  crc->add_bits(allocation, length);
  813.  crc->add_bits(channel2_allocation, length);
  814.   }
  815. }
  818. void SubbandLayer2Stereo::read_scalefactor_selection(Ibitstream *stream, Crc16 *crc)
  819. {
  820.   if (allocation)
  821.   {
  822.  scfsi = stream->get_bits(2);
  823.  if (crc)
  824. crc->add_bits(scfsi, 2);
  825.   }
  826.   if (channel2_allocation)
  827.   {
  828.  channel2_scfsi = stream->get_bits(2);
  829.  if (crc)
  830. crc->add_bits(channel2_scfsi, 2);
  831.   }
  832. }
  835. void SubbandLayer2Stereo::read_scalefactor(Ibitstream *stream, Header *header)
  836. {
  837.   SubbandLayer2::read_scalefactor(stream, header);
  838.   if (channel2_allocation)
  839.   {
  840.  switch (channel2_scfsi)
  841.  {
  842. case 0:
  843.       channel2_scalefactor1 = scalefactors[stream->get_bits(6)];
  844.    channel2_scalefactor2 = scalefactors[stream->get_bits(6)];
  845.    channel2_scalefactor3 = scalefactors[stream->get_bits(6)];
  846.    break;
  848. case 1:
  849.    channel2_scalefactor1 = channel2_scalefactor2 =
  850.              scalefactors[stream->get_bits(6)];
  851.    channel2_scalefactor3 = scalefactors[stream->get_bits(6)];
  852.    break;
  854. case 2:
  855.    channel2_scalefactor1 = channel2_scalefactor2 =
  856.    channel2_scalefactor3 = scalefactors[stream->get_bits(6)];
  857.    break;
  859. case 3:
  860.    channel2_scalefactor1 = scalefactors[stream->get_bits(6)];
  861.    channel2_scalefactor2 = channel2_scalefactor3 =
  862.           scalefactors[stream->get_bits(6)];
  863.       break;
  864.  }
  865.  prepare_sample_reading(header, channel2_allocation, &channel2_groupingtable,
  866.                            &channel2_factor, &channel2_codelength, &channel2_c,
  867.                            &channel2_d);
  868.   }
  869. }
  872. bool SubbandLayer2Stereo::read_sampledata(Ibitstream *stream)
  873. {
  874.   bool returnvalue = SubbandLayer2::read_sampledata(stream);
  876.   if (channel2_allocation)
  877.  if (channel2_groupingtable) {
  878. uint32 samplecode = stream->get_bits(channel2_codelength);
  879. // create requantized samples:
  880. samplecode += samplecode << 1;
  881. register real *target = channel2_samples;
  882. register const real *source = channel2_groupingtable + samplecode;
  883. *target++ = *source++;
  884. *target++ = *source++;
  885. *target = *source;
  886. // memcpy (channel2_samples, channel2_groupingtable + samplecode, 3 * sizeof (real));
  887.     } else {
  888. channel2_samples[0] = real (stream->get_bits(channel2_codelength)) *
  889.         channel2_factor - 1.0f;
  890. channel2_samples[1] = real (stream->get_bits(channel2_codelength)) *
  891.         channel2_factor - 1.0f;
  892. channel2_samples[2] = real (stream->get_bits(channel2_codelength)) *
  893.                             channel2_factor - 1.0f;
  894.  }
  896.   return returnvalue;
  897. }
  900. bool SubbandLayer2Stereo::put_next_sample(e_channels channels,
  901. SynthesisFilter *filter1,
  902.                                           SynthesisFilter *filter2)
  903. {
  904.   bool returnvalue = SubbandLayer2::put_next_sample(channels, filter1, filter2);
  905.   if (channel2_allocation && channels != left)
  906.   {
  907.  register real sample = channel2_samples[samplenumber - 1];
  909.  if (!channel2_groupingtable)
  910. sample = (sample + channel2_d) * channel2_c;
  912.  if (groupnumber <= 4)
  913. sample *= channel2_scalefactor1;
  914.  else if (groupnumber <= 8)
  915. sample *= channel2_scalefactor2;
  916.  else
  917. sample *= channel2_scalefactor3;
  918.  if (channels == both)
  919. filter2->input_sample(sample, subbandnumber);
  920.  else
  921. filter1->input_sample(sample, subbandnumber);
  922.   }
  923.   return returnvalue;
  924. }