mirror of
https://github.com/ZLMediaKit/ZLMediaKit.git
synced 2024-11-30 07:26:53 +08:00
146 lines
3.8 KiB
C++
146 lines
3.8 KiB
C++
/*
|
|
** FAAD2 - Freeware Advanced Audio (AAC) Decoder including SBR decoding
|
|
** Copyright (C) 2003-2005 M. Bakker, Nero AG, http://www.nero.com
|
|
**
|
|
** 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.
|
|
**
|
|
** Any non-GPL usage of this software or parts of this software is strictly
|
|
** forbidden.
|
|
**
|
|
** The "appropriate copyright message" mentioned in section 2c of the GPLv2
|
|
** must read: "Code from FAAD2 is copyright (c) Nero AG, www.nero.com"
|
|
**
|
|
** Commercial non-GPL licensing of this software is possible.
|
|
** For more info contact Nero AG through Mpeg4AAClicense@nero.com.
|
|
**
|
|
** $Id: hcb.h,v 1.8 2007/11/01 12:34:10 menno Exp $
|
|
**/
|
|
|
|
#ifndef __HCB_H__
|
|
#define __HCB_H__
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
/*
|
|
* Optimal huffman decoding for AAC taken from:
|
|
* "SELECTING AN OPTIMAL HUFFMAN DECODER FOR AAC" by
|
|
* VLADIMIR Z. MESAROVIC , RAGHUNATH RAO, MIROSLAV V. DOKIC, and SACHIN DEO
|
|
* AES paper 5436
|
|
*
|
|
* 2 methods are used for huffman decoding:
|
|
* - binary search
|
|
* - 2-step table lookup
|
|
*
|
|
* The choice of the "optimal" method is based on the fact that if the
|
|
* memory size for the Two-step is exorbitantly high then the decision
|
|
* is Binary search for that codebook. However, for marginally more memory
|
|
* size, if Twostep outperforms even the best case of Binary then the
|
|
* decision is Two-step for that codebook.
|
|
*
|
|
* The following methods are used for the different tables.
|
|
* codebook "optimal" method
|
|
* HCB_1 2-Step
|
|
* HCB_2 2-Step
|
|
* HCB_3 Binary
|
|
* HCB_4 2-Step
|
|
* HCB_5 Binary
|
|
* HCB_6 2-Step
|
|
* HCB_7 Binary
|
|
* HCB_8 2-Step
|
|
* HCB_9 Binary
|
|
* HCB_10 2-Step
|
|
* HCB_11 2-Step
|
|
* HCB_SF Binary
|
|
*
|
|
*/
|
|
|
|
|
|
#define ZERO_HCB 0
|
|
#define FIRST_PAIR_HCB 5
|
|
#define ESC_HCB 11
|
|
#define QUAD_LEN 4
|
|
#define PAIR_LEN 2
|
|
#define NOISE_HCB 13
|
|
#define INTENSITY_HCB2 14
|
|
#define INTENSITY_HCB 15
|
|
|
|
/* 1st step table */
|
|
typedef struct
|
|
{
|
|
uint8_t offset;
|
|
uint8_t extra_bits;
|
|
} hcb;
|
|
|
|
/* 2nd step table with quadruple data */
|
|
typedef struct
|
|
{
|
|
uint8_t bits;
|
|
int8_t x;
|
|
int8_t y;
|
|
} hcb_2_pair;
|
|
|
|
typedef struct
|
|
{
|
|
uint8_t bits;
|
|
int8_t x;
|
|
int8_t y;
|
|
int8_t v;
|
|
int8_t w;
|
|
} hcb_2_quad;
|
|
|
|
/* binary search table */
|
|
typedef struct
|
|
{
|
|
uint8_t is_leaf;
|
|
int8_t data[4];
|
|
} hcb_bin_quad;
|
|
|
|
typedef struct
|
|
{
|
|
uint8_t is_leaf;
|
|
int8_t data[2];
|
|
} hcb_bin_pair;
|
|
|
|
hcb *hcb_table[];
|
|
hcb_2_quad *hcb_2_quad_table[];
|
|
hcb_2_pair *hcb_2_pair_table[];
|
|
hcb_bin_pair *hcb_bin_table[];
|
|
uint8_t hcbN[];
|
|
uint8_t unsigned_cb[];
|
|
int hcb_2_quad_table_size[];
|
|
int hcb_2_pair_table_size[];
|
|
int hcb_bin_table_size[];
|
|
|
|
#include "codebook/hcb_1.h"
|
|
#include "codebook/hcb_2.h"
|
|
#include "codebook/hcb_3.h"
|
|
#include "codebook/hcb_4.h"
|
|
#include "codebook/hcb_5.h"
|
|
#include "codebook/hcb_6.h"
|
|
#include "codebook/hcb_7.h"
|
|
#include "codebook/hcb_8.h"
|
|
#include "codebook/hcb_9.h"
|
|
#include "codebook/hcb_10.h"
|
|
#include "codebook/hcb_11.h"
|
|
#include "codebook/hcb_sf.h"
|
|
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
#endif
|