ref: 584e5f7e8212f70af2d8480f580ce7005a6579c5
dir: /libfaad/codebook/hcb_4.c/
/*
** FAAD - Freeware Advanced Audio Decoder
** Copyright (C) 2002 M. Bakker
**
** This program is free software; you can redistribute it and/or modify
** it under the terms of the GNU General Public License as published by
** the Free Software Foundation; either version 2 of the License, or
** (at your option) any later version.
**
** This program is distributed in the hope that it will be useful,
** but WITHOUT ANY WARRANTY; without even the implied warranty of
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
** GNU General Public License for more details.
**
** You should have received a copy of the GNU General Public License
** along with this program; if not, write to the Free Software
** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
**
** $Id: hcb_4.c,v 1.2 2002/02/18 10:01:05 menno Exp $
**/
#include "../common.h"
#include "hcb.h"
/* 2-step huffman table HCB_4 */
/* 1st step: 5 bits
* 2^5 = 32 entries
*
* Used to find offset into 2nd step table and number of extra bits to get
*/
extern hcb hcb4_1[] = {
/* 4 bit codewords */
{ /* 00000 */ 0, 0 },
{ /* */ 0, 0 },
{ /* 00010 */ 1, 0 },
{ /* */ 1, 0 },
{ /* 00100 */ 2, 0 },
{ /* */ 2, 0 },
{ /* 00110 */ 3, 0 },
{ /* */ 3, 0 },
{ /* 01000 */ 4, 0 },
{ /* */ 4, 0 },
{ /* 01010 */ 5, 0 },
{ /* */ 5, 0 },
{ /* 01100 */ 6, 0 },
{ /* */ 6, 0 },
{ /* 01110 */ 7, 0 },
{ /* */ 7, 0 },
{ /* 10000 */ 8, 0 },
{ /* */ 8, 0 },
{ /* 10010 */ 9, 0 },
{ /* */ 9, 0 },
/* 5 bit codewords */
{ /* 10100 */ 10, 0 },
{ /* 10101 */ 11, 0 },
{ /* 10110 */ 12, 0 },
{ /* 10111 */ 13, 0 },
{ /* 11000 */ 14, 0 },
{ /* 11001 */ 15, 0 },
/* 7 bit codewords */
{ /* 11010 */ 16, 2 },
{ /* 11011 */ 20, 2 },
/* 7/8 bit codewords */
{ /* 11100 */ 24, 3 },
/* 8 bit codewords */
{ /* 11101 */ 32, 3 },
/* 8/9 bit codewords */
{ /* 11110 */ 40, 4 },
/* 9/10/11/12 bit codewords */
{ /* 11111 */ 56, 7 }
};
/* 2nd step table
*
* Gives size of codeword and actual data (x,y,v,w)
*/
extern hcb_2_quad hcb4_2[] = {
/* 4 bit codewords */
{ 4, 1, 1, 1, 1 },
{ 4, 0, 1, 1, 1 },
{ 4, 1, 1, 0, 1 },
{ 4, 1, 1, 1, 0 },
{ 4, 1, 0, 1, 1 },
{ 4, 1, 0, 0, 0 },
{ 4, 1, 1, 0, 0 },
{ 4, 0, 0, 0, 0 },
{ 4, 0, 0, 1, 1 },
{ 4, 1, 0, 1, 0 },
/* 5 bit codewords */
{ 5, 1, 0, 0, 1 },
{ 5, 0, 1, 1, 0 },
{ 5, 0, 0, 0, 1 },
{ 5, 0, 1, 0, 1 },
{ 5, 0, 0, 1, 0 },
{ 5, 0, 1, 0, 0 },
/* 7 bit codewords */
/* first 5 bits: 11010 */
{ 7, 2, 1, 1, 1 },
{ 7, 1, 1, 2, 1 },
{ 7, 1, 2, 1, 1 },
{ 7, 1, 1, 1, 2 },
/* first 5 bits: 11011 */
{ 7, 2, 1, 1, 0 },
{ 7, 2, 1, 0, 1 },
{ 7, 1, 2, 1, 0 },
{ 7, 2, 0, 1, 1 },
/* 7/8 bit codewords */
/* first 5 bits: 11100 */
{ 7, 0, 1, 2, 1 }, { 7, 0, 1, 2, 1 },
{ 8, 0, 1, 1, 2 },
{ 8, 1, 1, 2, 0 },
{ 8, 0, 2, 1, 1 },
{ 8, 1, 0, 1, 2 },
{ 8, 1, 2, 0, 1 },
{ 8, 1, 1, 0, 2 },
/* 8 bit codewords */
{ 8, 1, 0, 2, 1 },
{ 8, 2, 1, 0, 0 },
{ 8, 2, 0, 1, 0 },
{ 8, 1, 2, 0, 0 },
{ 8, 2, 0, 0, 1 },
{ 8, 0, 1, 0, 2 },
{ 8, 0, 2, 1, 0 },
{ 8, 0, 0, 1, 2 },
/* 8/9 bit codewords */
{ 8, 0, 1, 2, 0 }, { 8, 0, 1, 2, 0 },
{ 8, 0, 2, 0, 1 }, { 8, 0, 2, 0, 1 },
{ 8, 1, 0, 0, 2 }, { 8, 1, 0, 0, 2 },
{ 8, 0, 0, 2, 1 }, { 8, 0, 0, 2, 1 },
{ 8, 1, 0, 2, 0 }, { 8, 1, 0, 2, 0 },
{ 8, 2, 0, 0, 0 }, { 8, 2, 0, 0, 0 },
{ 8, 0, 0, 0, 2 }, { 8, 0, 0, 0, 2 },
{ 9, 0, 2, 0, 0 },
{ 9, 0, 0, 2, 0 },
/* 9/10/11 bit codewords */
/* 9 bit codewords repeated 2^3 = 8 times */
{ 9, 1, 2, 2, 1 }, { 9, 1, 2, 2, 1 }, { 9, 1, 2, 2, 1 }, { 9, 1, 2, 2, 1 },
{ 9, 1, 2, 2, 1 }, { 9, 1, 2, 2, 1 }, { 9, 1, 2, 2, 1 }, { 9, 1, 2, 2, 1 },
{ 9, 2, 2, 1, 1 }, { 9, 2, 2, 1, 1 }, { 9, 2, 2, 1, 1 }, { 9, 2, 2, 1, 1 },
{ 9, 2, 2, 1, 1 }, { 9, 2, 2, 1, 1 }, { 9, 2, 2, 1, 1 }, { 9, 2, 2, 1, 1 },
{ 9, 2, 1, 2, 1 }, { 9, 2, 1, 2, 1 }, { 9, 2, 1, 2, 1 }, { 9, 2, 1, 2, 1 },
{ 9, 2, 1, 2, 1 }, { 9, 2, 1, 2, 1 }, { 9, 2, 1, 2, 1 }, { 9, 2, 1, 2, 1 },
{ 9, 1, 1, 2, 2 }, { 9, 1, 1, 2, 2 }, { 9, 1, 1, 2, 2 }, { 9, 1, 1, 2, 2 },
{ 9, 1, 1, 2, 2 }, { 9, 1, 1, 2, 2 }, { 9, 1, 1, 2, 2 }, { 9, 1, 1, 2, 2 },
{ 9, 1, 2, 1, 2 }, { 9, 1, 2, 1, 2 }, { 9, 1, 2, 1, 2 }, { 9, 1, 2, 1, 2 },
{ 9, 1, 2, 1, 2 }, { 9, 1, 2, 1, 2 }, { 9, 1, 2, 1, 2 }, { 9, 1, 2, 1, 2 },
{ 9, 2, 1, 1, 2 }, { 9, 2, 1, 1, 2 }, { 9, 2, 1, 1, 2 }, { 9, 2, 1, 1, 2 },
{ 9, 2, 1, 1, 2 }, { 9, 2, 1, 1, 2 }, { 9, 2, 1, 1, 2 }, { 9, 2, 1, 1, 2 },
/* 10 bit codewords repeated 2^2 = 4 times */
{ 10, 1, 2, 2, 0 }, { 10, 1, 2, 2, 0 }, { 10, 1, 2, 2, 0 }, { 10, 1, 2, 2, 0 },
{ 10, 2, 2, 1, 0 }, { 10, 2, 2, 1, 0 }, { 10, 2, 2, 1, 0 }, { 10, 2, 2, 1, 0 },
{ 10, 2, 1, 2, 0 }, { 10, 2, 1, 2, 0 }, { 10, 2, 1, 2, 0 }, { 10, 2, 1, 2, 0 },
{ 10, 0, 2, 2, 1 }, { 10, 0, 2, 2, 1 }, { 10, 0, 2, 2, 1 }, { 10, 0, 2, 2, 1 },
{ 10, 0, 1, 2, 2 }, { 10, 0, 1, 2, 2 }, { 10, 0, 1, 2, 2 }, { 10, 0, 1, 2, 2 },
{ 10, 2, 2, 0, 1 }, { 10, 2, 2, 0, 1 }, { 10, 2, 2, 0, 1 }, { 10, 2, 2, 0, 1 },
{ 10, 0, 2, 1, 2 }, { 10, 0, 2, 1, 2 }, { 10, 0, 2, 1, 2 }, { 10, 0, 2, 1, 2 },
{ 10, 2, 0, 2, 1 }, { 10, 2, 0, 2, 1 }, { 10, 2, 0, 2, 1 }, { 10, 2, 0, 2, 1 },
{ 10, 1, 0, 2, 2 }, { 10, 1, 0, 2, 2 }, { 10, 1, 0, 2, 2 }, { 10, 1, 0, 2, 2 },
{ 10, 2, 2, 2, 1 }, { 10, 2, 2, 2, 1 }, { 10, 2, 2, 2, 1 }, { 10, 2, 2, 2, 1 },
{ 10, 1, 2, 0, 2 }, { 10, 1, 2, 0, 2 }, { 10, 1, 2, 0, 2 }, { 10, 1, 2, 0, 2 },
{ 10, 2, 0, 1, 2 }, { 10, 2, 0, 1, 2 }, { 10, 2, 0, 1, 2 }, { 10, 2, 0, 1, 2 },
{ 10, 2, 1, 0, 2 }, { 10, 2, 1, 0, 2 }, { 10, 2, 1, 0, 2 }, { 10, 2, 1, 0, 2 },
{ 10, 1, 2, 2, 2 }, { 10, 1, 2, 2, 2 }, { 10, 1, 2, 2, 2 }, { 10, 1, 2, 2, 2 },
/* 11 bit codewords repeated 2^1 = 2 times */
{ 11, 2, 1, 2, 2 }, { 11, 2, 1, 2, 2 },
{ 11, 2, 2, 1, 2 }, { 11, 2, 2, 1, 2 },
{ 11, 0, 2, 2, 0 }, { 11, 0, 2, 2, 0 },
{ 11, 2, 2, 0, 0 }, { 11, 2, 2, 0, 0 },
{ 11, 0, 0, 2, 2 }, { 11, 0, 0, 2, 2 },
{ 11, 2, 0, 2, 0 }, { 11, 2, 0, 2, 0 },
{ 11, 0, 2, 0, 2 }, { 11, 0, 2, 0, 2 },
{ 11, 2, 0, 0, 2 }, { 11, 2, 0, 0, 2 },
{ 11, 2, 2, 2, 2 }, { 11, 2, 2, 2, 2 },
{ 11, 0, 2, 2, 2 }, { 11, 0, 2, 2, 2 },
{ 11, 2, 2, 2, 0 }, { 11, 2, 2, 2, 0 },
/* 12 bit codewords */
{ 12, 2, 2, 0, 2 },
{ 12, 2, 0, 2, 2 },
};