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author | Sean Bartell <wingedtachikoma@gmail.com> | 2011-06-25 21:32:25 -0400 |
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committer | Nils Wallménius <nils@rockbox.org> | 2012-04-25 22:13:20 +0200 |
commit | f40bfc9267b13b54e6379dfe7539447662879d24 (patch) | |
tree | 9b20069d5e62809ff434061ad730096836f916f2 /lib/rbcodec/codecs/libfaad/codebook/hcb.h | |
parent | a0009907de7a0107d49040d8a180f140e2eff299 (diff) | |
download | rockbox-f40bfc9267b13b54e6379dfe7539447662879d24.tar.gz rockbox-f40bfc9267b13b54e6379dfe7539447662879d24.zip |
Add codecs to librbcodec.
Change-Id: Id7f4717d51ed02d67cb9f9cb3c0ada4a81843f97
Reviewed-on: http://gerrit.rockbox.org/137
Reviewed-by: Nils Wallménius <nils@rockbox.org>
Tested-by: Nils Wallménius <nils@rockbox.org>
Diffstat (limited to 'lib/rbcodec/codecs/libfaad/codebook/hcb.h')
-rw-r--r-- | lib/rbcodec/codecs/libfaad/codebook/hcb.h | 142 |
1 files changed, 142 insertions, 0 deletions
diff --git a/lib/rbcodec/codecs/libfaad/codebook/hcb.h b/lib/rbcodec/codecs/libfaad/codebook/hcb.h new file mode 100644 index 0000000000..eaefdbf437 --- /dev/null +++ b/lib/rbcodec/codecs/libfaad/codebook/hcb.h | |||
@@ -0,0 +1,142 @@ | |||
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 | ** $Id$ | ||
26 | **/ | ||
27 | |||
28 | #ifndef __HCB_H__ | ||
29 | #define __HCB_H__ | ||
30 | |||
31 | #ifdef __cplusplus | ||
32 | extern "C" { | ||
33 | #endif | ||
34 | |||
35 | /* | ||
36 | * Optimal huffman decoding for AAC taken from: | ||
37 | * "SELECTING AN OPTIMAL HUFFMAN DECODER FOR AAC" by | ||
38 | * VLADIMIR Z. MESAROVIC , RAGHUNATH RAO, MIROSLAV V. DOKIC, and SACHIN DEO | ||
39 | * AES paper 5436 | ||
40 | * | ||
41 | * 2 methods are used for huffman decoding: | ||
42 | * - binary search | ||
43 | * - 2-step table lookup | ||
44 | * | ||
45 | * The choice of the "optimal" method is based on the fact that if the | ||
46 | * memory size for the Two-step is exorbitantly high then the decision | ||
47 | * is Binary search for that codebook. However, for marginally more memory | ||
48 | * size, if Twostep outperforms even the best case of Binary then the | ||
49 | * decision is Two-step for that codebook. | ||
50 | * | ||
51 | * The following methods are used for the different tables. | ||
52 | * codebook "optimal" method | ||
53 | * HCB_1 2-Step | ||
54 | * HCB_2 2-Step | ||
55 | * HCB_3 Binary | ||
56 | * HCB_4 2-Step | ||
57 | * HCB_5 Binary | ||
58 | * HCB_6 2-Step | ||
59 | * HCB_7 Binary | ||
60 | * HCB_8 2-Step | ||
61 | * HCB_9 Binary | ||
62 | * HCB_10 2-Step | ||
63 | * HCB_11 2-Step | ||
64 | * HCB_SF Binary | ||
65 | * | ||
66 | */ | ||
67 | |||
68 | |||
69 | #define ZERO_HCB 0 | ||
70 | #define FIRST_PAIR_HCB 5 | ||
71 | #define ESC_HCB 11 | ||
72 | #define QUAD_LEN 4 | ||
73 | #define PAIR_LEN 2 | ||
74 | #define NOISE_HCB 13 | ||
75 | #define INTENSITY_HCB2 14 | ||
76 | #define INTENSITY_HCB 15 | ||
77 | |||
78 | /* 1st step table */ | ||
79 | typedef struct | ||
80 | { | ||
81 | uint8_t offset; | ||
82 | uint8_t extra_bits; | ||
83 | } hcb; | ||
84 | |||
85 | /* 2nd step table with quadruple data */ | ||
86 | typedef struct | ||
87 | { | ||
88 | uint8_t bits; | ||
89 | int8_t x; | ||
90 | int8_t y; | ||
91 | } hcb_2_pair; | ||
92 | |||
93 | typedef struct | ||
94 | { | ||
95 | uint8_t bits; | ||
96 | int8_t x; | ||
97 | int8_t y; | ||
98 | int8_t v; | ||
99 | int8_t w; | ||
100 | } hcb_2_quad; | ||
101 | |||
102 | /* binary search table */ | ||
103 | typedef struct | ||
104 | { | ||
105 | uint8_t is_leaf; | ||
106 | int8_t data[4]; | ||
107 | } hcb_bin_quad; | ||
108 | |||
109 | typedef struct | ||
110 | { | ||
111 | uint8_t is_leaf; | ||
112 | int8_t data[2]; | ||
113 | } hcb_bin_pair; | ||
114 | |||
115 | hcb *hcb_table[]; | ||
116 | hcb_2_quad *hcb_2_quad_table[]; | ||
117 | hcb_2_pair *hcb_2_pair_table[]; | ||
118 | hcb_bin_pair *hcb_bin_table[]; | ||
119 | uint8_t hcbN[]; | ||
120 | uint8_t unsigned_cb[]; | ||
121 | int hcb_2_quad_table_size[]; | ||
122 | int hcb_2_pair_table_size[]; | ||
123 | int hcb_bin_table_size[]; | ||
124 | |||
125 | #include "codebook/hcb_1.h" | ||
126 | #include "codebook/hcb_2.h" | ||
127 | #include "codebook/hcb_3.h" | ||
128 | #include "codebook/hcb_4.h" | ||
129 | #include "codebook/hcb_5.h" | ||
130 | #include "codebook/hcb_6.h" | ||
131 | #include "codebook/hcb_7.h" | ||
132 | #include "codebook/hcb_8.h" | ||
133 | #include "codebook/hcb_9.h" | ||
134 | #include "codebook/hcb_10.h" | ||
135 | #include "codebook/hcb_11.h" | ||
136 | #include "codebook/hcb_sf.h" | ||
137 | |||
138 | |||
139 | #ifdef __cplusplus | ||
140 | } | ||
141 | #endif | ||
142 | #endif | ||