libfaad2/codebook/hcb_2.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_2.h,v 1.3 2003/09/09 18:12:01 menno Exp $
  26 **/
  27
  28 /* 2-step huffman table HCB_2 */
  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 hcb2_1[] = {
  37     { /* 00000 */ 0, 0 },
  38     { /*       */ 0, 0 },
  39     { /*       */ 0, 0 },
  40     { /*       */ 0, 0 },
  41     { /* 00100 */ 1, 0 },
  42     { /*       */ 1, 0 },
  43     { /* 00110 */ 2, 0 },
  44     { /* 00111 */ 3, 0 },
  45     { /* 01000 */ 4, 0 },
  46     { /* 01001 */ 5, 0 },
  47     { /* 01010 */ 6, 0 },
  48     { /* 01011 */ 7, 0 },
  49     { /* 01100 */ 8, 0 },
  50
  51     /* 6 bit codewords */
  52     { /* 01101 */ 9,  1 },
  53     { /* 01110 */ 11, 1 },
  54     { /* 01111 */ 13, 1 },
  55     { /* 10000 */ 15, 1 },
  56     { /* 10001 */ 17, 1 },
  57     { /* 10010 */ 19, 1 },
  58     { /* 10011 */ 21, 1 },
  59     { /* 10100 */ 23, 1 },
  60     { /* 10101 */ 25, 1 },
  61     { /* 10110 */ 27, 1 },
  62     { /* 10111 */ 29, 1 },
  63     { /* 11000 */ 31, 1 },
  64
  65     /* 7 bit codewords */
  66     { /* 11001 */ 33, 2 },
  67     { /* 11010 */ 37, 2 },
  68     { /* 11011 */ 41, 2 },
  69
  70     /* 7/8 bit codewords */
  71     { /* 11100 */ 45, 3 },
  72
  73     /* 8 bit codewords */
  74     { /* 11101 */ 53, 3 },
  75     { /* 11110 */ 61, 3 },
  76
  77     /* 8/9 bit codewords */
  78     { /* 11111 */ 69, 4 }
  79 };
  80
  81 /* 2nd step table
  82  *
  83  * Gives size of codeword and actual data (x,y,v,w)
  84  */
  85 static hcb_2_quad hcb2_2[] = {
  86     /* 3 bit codeword */
  87     { 3,  0,  0,  0,  0 },
  88
  89     /* 4 bit codeword */
  90     { 4,  1,  0,  0,  0 },
  91
  92     /* 5 bit codewords */
  93     { 5, -1,  0,  0,  0 },
  94     { 5,  0,  0,  0,  1 },
  95     { 5,  0,  0, -1,  0 },
  96     { 5,  0,  0,  0, -1 },
  97     { 5,  0, -1,  0,  0 },
  98     { 5,  0,  0,  1,  0 },
  99     { 5,  0,  1,  0,  0 },
 100
 101     /* 6 bit codewords */
 102     { 6,  0, -1,  1,  0 },
 103     { 6, -1,  1,  0,  0 },
 104     { 6,  0,  1, -1,  0 },
 105     { 6,  0,  0,  1, -1 },
 106     { 6,  0,  1,  0, -1 },
 107     { 6,  0,  0, -1,  1 },
 108     { 6, -1,  0,  0, -1 },
 109     { 6,  1, -1,  0,  0 },
 110     { 6,  1,  0, -1,  0 },
 111     { 6, -1, -1,  0,  0 },
 112     { 6,  0,  0, -1, -1 },
 113     { 6,  1,  0,  1,  0 },
 114     { 6,  1,  0,  0,  1 },
 115     { 6,  0, -1,  0,  1 },
 116     { 6, -1,  0,  1,  0 },
 117     { 6,  0,  1,  0,  1 },
 118     { 6,  0, -1, -1,  0 },
 119     { 6, -1,  0,  0,  1 },
 120     { 6,  0, -1,  0, -1 },
 121     { 6, -1,  0, -1,  0 },
 122     { 6,  1,  1,  0,  0 },
 123     { 6,  0,  1,  1,  0 },
 124     { 6,  0,  0,  1,  1 },
 125     { 6,  1,  0,  0, -1 },
 126
 127     /* 7 bit codewords */
 128     { 7,  0,  1, -1,  1 },
 129     { 7,  1,  0, -1,  1 },
 130     { 7, -1,  1, -1,  0 },
 131     { 7,  0, -1,  1, -1 },
 132     { 7,  1, -1,  1,  0 },
 133     { 7,  1,  1,  0, -1 },
 134     { 7,  1,  0,  1,  1 },
 135     { 7, -1,  1,  1,  0 },
 136     { 7,  0, -1, -1,  1 },
 137     { 7,  1,  1,  1,  0 },
 138     { 7, -1,  0,  1, -1 },
 139     { 7, -1, -1, -1,  0 },
 140
 141     /* 7/8 bit codewords */
 142     { 7, -1,  0, -1,  1 }, { 7, -1,  0, -1,  1 },
 143     { 7,  1, -1, -1,  0 }, { 7,  1, -1, -1,  0 },
 144     { 7,  1,  1, -1,  0 }, { 7,  1,  1, -1,  0 },
 145     { 8,  1, -1,  0,  1 },
 146     { 8, -1,  1,  0, -1 },
 147
 148     /* 8 bit codewords */
 149     { 8, -1, -1,  1,  0 },
 150     { 8, -1,  0,  1,  1 },
 151     { 8, -1, -1,  0,  1 },
 152     { 8, -1, -1,  0, -1 },
 153     { 8,  0, -1, -1, -1 },
 154     { 8,  1,  0,  1, -1 },
 155     { 8,  1,  0, -1, -1 },
 156     { 8,  0,  1, -1, -1 },
 157     { 8,  0,  1,  1,  1 },
 158     { 8, -1,  1,  0,  1 },
 159     { 8, -1,  0, -1, -1 },
 160     { 8,  0,  1,  1, -1 },
 161     { 8,  1, -1,  0, -1 },
 162     { 8,  0, -1,  1,  1 },
 163     { 8,  1,  1,  0,  1 },
 164     { 8,  1, -1,  1, -1 },
 165
 166     /* 8/9 bit codewords */
 167     { 8, -1,  1, -1,  1 }, { 8, -1,  1, -1,  1 },
 168     { 9,  1, -1, -1,  1 },
 169     { 9, -1, -1, -1, -1 },
 170     { 9, -1,  1,  1, -1 },
 171     { 9, -1,  1,  1,  1 },
 172     { 9,  1,  1,  1,  1 },
 173     { 9, -1, -1,  1, -1 },
 174     { 9,  1, -1,  1,  1 },
 175     { 9, -1,  1, -1, -1 },
 176     { 9, -1, -1,  1,  1 },
 177     { 9,  1,  1, -1, -1 },
 178     { 9,  1, -1, -1, -1 },
 179     { 9, -1, -1, -1,  1 },
 180     { 9,  1,  1, -1,  1 },
 181     { 9,  1,  1,  1, -1 }
 182 };