libfaad2/codebook/hcb_6.h

   1 /*
   2 ** FAAD2 - Freeware Advanced Audio (AAC) Decoder including SBR decoding
   3 ** Copyright (C) 2003 M. Bakker, Ahead Software AG, http://www.nero.com
   4 **
   5 ** This program is free software; you can redistribute it and/or modify
   6 ** it under the terms of the GNU General Public License as published by
   7 ** the Free Software Foundation; either version 2 of the License, or
   8 ** (at your option) any later version.
   9 **
  10 ** This program is distributed in the hope that it will be useful,
  11 ** but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 ** GNU General Public License for more details.
  14 **
  15 ** You should have received a copy of the GNU General Public License
  16 ** along with this program; if not, write to the Free Software
  17 ** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  18 **
  19 ** Any non-GPL usage of this software or parts of this software is strictly
  20 ** forbidden.
  21 **
  22 ** Commercial non-GPL licensing of this software is possible.
  23 ** For more info contact Ahead Software through Mpeg4AAClicense@nero.com.
  24 **
  25 ** $Id: hcb_6.h,v 1.3 2003/09/09 18:12:01 menno Exp $
  26 **/
  27
  28 /* 2-step huffman table HCB_6 */
  29
  30
  31 /* 1st step: 5 bits
  32  *           2^5 = 32 entries
  33  *
  34  * Used to find offset into 2nd step table and number of extra bits to get
  35  */
  36 static hcb hcb6_1[] = {
  37     /* 4 bit codewords */
  38     { /* 00000 */ 0, 0 },
  39     { /*       */ 0, 0 },
  40     { /* 00010 */ 1, 0 },
  41     { /*       */ 1, 0 },
  42     { /* 00100 */ 2, 0 },
  43     { /*       */ 2, 0 },
  44     { /* 00110 */ 3, 0 },
  45     { /*       */ 3, 0 },
  46     { /* 01000 */ 4, 0 },
  47     { /*       */ 4, 0 },
  48     { /* 01010 */ 5, 0 },
  49     { /*       */ 5, 0 },
  50     { /* 01100 */ 6, 0 },
  51     { /*       */ 6, 0 },
  52     { /* 01110 */ 7, 0 },
  53     { /*       */ 7, 0 },
  54     { /* 10000 */ 8, 0 },
  55     { /*       */ 8, 0 },
  56
  57     /* 6 bit codewords */
  58     { /* 10010 */ 9, 1 },
  59     { /* 10011 */ 11, 1 },
  60     { /* 10100 */ 13, 1 },
  61     { /* 10101 */ 15, 1 },
  62     { /* 10110 */ 17, 1 },
  63     { /* 10111 */ 19, 1 },
  64     { /* 11000 */ 21, 1 },
  65     { /* 11001 */ 23, 1 },
  66
  67     /* 7 bit codewords */
  68     { /* 11010 */ 25, 2 },
  69     { /* 11011 */ 29, 2 },
  70     { /* 11100 */ 33, 2 },
  71
  72     /* 7/8 bit codewords */
  73     { /* 11101 */ 37, 3 },
  74
  75     /* 8/9 bit codewords */
  76     { /* 11110 */ 45, 4 },
  77
  78     /* 9/10/11 bit codewords */
  79     { /* 11111 */ 61, 6 }
  80 };
  81
  82 /* 2nd step table
  83  *
  84  * Gives size of codeword and actual data (x,y,v,w)
  85  */
  86 static hcb_2_pair hcb6_2[] = {
  87     /* 4 bit codewords */
  88     { 4,  0,  0 },
  89     { 4,  1,  0 },
  90     { 4,  0, -1 },
  91     { 4,  0,  1 },
  92     { 4, -1,  0 },
  93     { 4,  1,  1 },
  94     { 4, -1,  1 },
  95     { 4,  1, -1 },
  96     { 4, -1, -1 },
  97
  98     /* 6 bit codewords */
  99     { 6,  2, -1 },
 100     { 6,  2,  1 },
 101     { 6, -2,  1 },
 102     { 6, -2, -1 },
 103     { 6, -2,  0 },
 104     { 6, -1,  2 },
 105     { 6,  2,  0 },
 106     { 6,  1, -2 },
 107     { 6,  1,  2 },
 108     { 6,  0, -2 },
 109     { 6, -1, -2 },
 110     { 6,  0,  2 },
 111     { 6,  2, -2 },
 112     { 6, -2,  2 },
 113     { 6, -2, -2 },
 114     { 6,  2,  2 },
 115
 116     /* 7 bit codewords */
 117     { 7, -3,  1 },
 118     { 7,  3,  1 },
 119     { 7,  3, -1 },
 120     { 7, -1,  3 },
 121     { 7, -3, -1 },
 122     { 7,  1,  3 },
 123     { 7,  1, -3 },
 124     { 7, -1, -3 },
 125     { 7,  3,  0 },
 126     { 7, -3,  0 },
 127     { 7,  0, -3 },
 128     { 7,  0,  3 },
 129
 130     /* 7/8 bit codewords */
 131     { 7,  3,  2 }, { 7,  3,  2 },
 132     { 8, -3, -2 },
 133     { 8, -2,  3 },
 134     { 8,  2,  3 },
 135     { 8,  3, -2 },
 136     { 8,  2, -3 },
 137     { 8, -2, -3 },
 138
 139     /* 8 bit codewords */
 140     { 8, -3,  2 }, { 8, -3,  2 },
 141     { 8,  3,  3 }, { 8,  3,  3 },
 142     { 9,  3, -3 },
 143     { 9, -3, -3 },
 144     { 9, -3,  3 },
 145     { 9,  1, -4 },
 146     { 9, -1, -4 },
 147     { 9,  4,  1 },
 148     { 9, -4,  1 },
 149     { 9, -4, -1 },
 150     { 9,  1,  4 },
 151     { 9,  4, -1 },
 152     { 9, -1,  4 },
 153     { 9,  0, -4 },
 154
 155     /* 9/10/11 bit codewords */
 156     { 9, -4,  2 }, { 9, -4,  2 }, { 9, -4,  2 }, { 9, -4,  2 },
 157     { 9, -4, -2 }, { 9, -4, -2 }, { 9, -4, -2 }, { 9, -4, -2 },
 158     { 9,  2,  4 }, { 9,  2,  4 }, { 9,  2,  4 }, { 9,  2,  4 },
 159     { 9, -2, -4 }, { 9, -2, -4 }, { 9, -2, -4 }, { 9, -2, -4 },
 160     { 9, -4,  0 }, { 9, -4,  0 }, { 9, -4,  0 }, { 9, -4,  0 },
 161     { 9,  4,  2 }, { 9,  4,  2 }, { 9,  4,  2 }, { 9,  4,  2 },
 162     { 9,  4, -2 }, { 9,  4, -2 }, { 9,  4, -2 }, { 9,  4, -2 },
 163     { 9, -2,  4 }, { 9, -2,  4 }, { 9, -2,  4 }, { 9, -2,  4 },
 164     { 9,  4,  0 }, { 9,  4,  0 }, { 9,  4,  0 }, { 9,  4,  0 },
 165     { 9,  2, -4 }, { 9,  2, -4 }, { 9,  2, -4 }, { 9,  2, -4 },
 166     { 9,  0,  4 }, { 9,  0,  4 }, { 9,  0,  4 }, { 9,  0,  4 },
 167     { 10, -3, -4 }, { 10, -3, -4 },
 168     { 10, -3,  4 }, { 10, -3,  4 },
 169     { 10,  3, -4 }, { 10,  3, -4 },
 170     { 10,  4, -3 }, { 10,  4, -3 },
 171     { 10,  3,  4 }, { 10,  3,  4 },
 172     { 10,  4,  3 }, { 10,  4,  3 },
 173     { 10, -4,  3 }, { 10, -4,  3 },
 174     { 10, -4, -3 }, { 10, -4, -3 },
 175     { 11,  4,  4 },
 176     { 11, -4,  4 },
 177     { 11, -4, -4 },
 178     { 11,  4, -4 }
 179 };