CARPLAY版本整理

MXC_A27-PCB4.5-270T/lib/faad2/libfaad/codebook/hcb.h

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+/*
+** 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