FFmpeg
imcdata.h
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1 /*
2  * IMC compatible decoder
3  * Copyright (c) 2002-2004 Maxim Poliakovski
4  * Copyright (c) 2006 Benjamin Larsson
5  * Copyright (c) 2006 Konstantin Shishkov
6  *
7  * This file is part of FFmpeg.
8  *
9  * FFmpeg is free software; you can redistribute it and/or
10  * modify it under the terms of the GNU Lesser General Public
11  * License as published by the Free Software Foundation; either
12  * version 2.1 of the License, or (at your option) any later version.
13  *
14  * FFmpeg is distributed in the hope that it will be useful,
15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17  * Lesser General Public License for more details.
18  *
19  * You should have received a copy of the GNU Lesser General Public
20  * License along with FFmpeg; if not, write to the Free Software
21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22  */
23 
24 #ifndef AVCODEC_IMCDATA_H
25 #define AVCODEC_IMCDATA_H
26 
27 #include <stdint.h>
28 
29 static const uint16_t band_tab[33] = {
30  0, 3, 6, 9, 12, 16, 20, 24, 29, 34, 40,
31  46, 53, 60, 68, 76, 84, 93, 102, 111, 121, 131,
32  141, 151, 162, 173, 184, 195, 207, 219, 231, 243, 256,
33 };
34 
35 
36 static const int8_t cyclTab[32] = {
37  1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11,
38  12, 13, 14, 15, 16, 17, 18, 20, 21, 22, 23,
39  24, 25, 26, 27, 28, 29, 30, 31, 32, 32,
40 };
41 
42 static const int8_t cyclTab2[32] = {
43  -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11,
44  12, 13, 14, 15, 16, 17, 17, 18, 19, 20, 21, 22,
45 23, 24, 25, 26, 27, 28, 29};
46 
47 static const float imc_weights1[31] = {
48  0.119595, 0.123124, 0.129192, 9.97377e-2, 8.1923e-2, 9.61153e-2, 8.77885e-2, 8.61174e-2,
49  9.00882e-2, 9.91658e-2, 0.112991, 0.131126, 0.152886, 0.177292, 0.221782, 0.244917, 0.267386,
50  0.306816, 0.323046, 0.33729, 0.366773, 0.392557, 0.398076, 0.403302, 0.42451, 0.444777,
51  0.449188, 0.455445, 0.477853, 0.500669, 0.510395};
52 
53 static const float imc_weights2[31] = {
54  3.23466e-3, 3.49886e-3, 3.98413e-3, 1.98116e-3, 1.16465e-3, 1.79283e-3, 1.40372e-3, 1.33274e-3,
55  1.50523e-3, 1.95064e-3, 2.77472e-3, 4.14725e-3, 6.2776e-3, 9.36401e-3, 1.71397e-2, 2.24052e-2,
56  2.83971e-2, 4.11689e-2, 4.73165e-2, 5.31631e-2, 6.66614e-2, 8.00824e-2, 8.31588e-2, 8.61397e-2,
57  9.89229e-2, 0.112197, 0.115227, 0.119613, 0.136174, 0.15445, 0.162685};
58 
59 static const float imc_quantizer1[4][8] = {
60  { 8.4431201e-1, 4.7358301e-1, 1.448354, 2.7073899e-1, 7.4449003e-1, 1.241991, 1.845484, 0.0},
61  { 8.6876702e-1, 4.7659001e-1, 1.478224, 2.5672799e-1, 7.55777e-1, 1.3229851, 2.03438, 0.0},
62  { 7.5891501e-1, 6.2272799e-1, 1.271322, 3.47904e-1, 7.5317699e-1, 1.150767, 1.628476, 0.0},
63  { 7.65257e-1, 6.44647e-1, 1.263824, 3.4548101e-1, 7.6384902e-1, 1.214466, 1.7638789, 0.0},
64 };
65 
66 static const float imc_quantizer2[2][56] = {
67  { 1.39236e-1, 3.50548e-1, 5.9547901e-1, 8.5772401e-1, 1.121545, 1.3882281, 1.695882, 2.1270809,
68  7.2221003e-2, 1.85177e-1, 2.9521701e-1, 4.12568e-1, 5.4068601e-1, 6.7679501e-1, 8.1196898e-1, 9.4765198e-1,
69  1.0779999, 1.203415, 1.337265, 1.481871, 1.639982, 1.814766, 2.0701399, 2.449862,
70  3.7533998e-2, 1.02722e-1, 1.6021401e-1, 2.16043e-1, 2.7231601e-1, 3.3025399e-1, 3.9022601e-1, 4.52849e-1,
71  5.1794899e-1, 5.8529502e-1, 6.53956e-1, 7.2312802e-1, 7.9150802e-1, 8.5891002e-1, 9.28141e-1, 9.9706203e-1,
72  1.062153, 1.12564, 1.189834, 1.256122, 1.324469, 1.3955311, 1.468906, 1.545084,
73  1.6264729, 1.711524, 1.802705, 1.91023, 2.0533991, 2.22333, 2.4830019, 3.253329 },
74  { 1.11654e-1, 3.54469e-1, 6.4232099e-1, 9.6128798e-1, 1.295053, 1.61777, 1.989839, 2.51107,
75  5.7721999e-2, 1.69879e-1, 2.97589e-1, 4.3858799e-1, 5.9039903e-1, 7.4934798e-1, 9.1628098e-1, 1.087297,
76  1.262751, 1.4288321, 1.6040879, 1.79067, 2.000668, 2.2394669, 2.649332, 5.2760072,
77  2.9722e-2, 8.7316997e-2, 1.4445201e-1, 2.04247e-1, 2.6879501e-1, 3.3716801e-1, 4.08811e-1, 4.8306999e-1,
78  5.6049401e-1, 6.3955498e-1, 7.2044599e-1, 8.0427998e-1, 8.8933599e-1, 9.7537601e-1, 1.062461, 1.1510431,
79  1.240236, 1.326715, 1.412513, 1.500502, 1.591749, 1.686413, 1.785239, 1.891233,
80  2.0051291, 2.127681, 2.2709141, 2.475826, 2.7219379, 3.101985, 4.686213, 6.2287788},
81 };
82 
83 
84 static const float xTab[14] = {7.6, 3.6, 4.4, 3.7, 6.1, 5.1, 2.3, 1.6, 6.2, 1.5, 1.8, 1.2, 0, 0}; //10014048
85 
86 /* precomputed table for 10^(i/4), i=-15..16 */
87 static const float imc_exp_tab[32] = {
88  1.778280e-4, 3.162278e-4, 5.623413e-4, 1.000000e-3,
89  1.778280e-3, 3.162278e-3, 5.623413e-3, 1.000000e-2,
90  1.778280e-2, 3.162278e-2, 5.623413e-2, 1.000000e-1,
91  1.778280e-1, 3.162278e-1, 5.623413e-1, 1.000000e00,
92  1.778280e00, 3.162278e00, 5.623413e00, 1.000000e01,
93  1.778280e01, 3.162278e01, 5.623413e01, 1.000000e02,
94  1.778280e02, 3.162278e02, 5.623413e02, 1.000000e03,
95  1.778280e03, 3.162278e03, 5.623413e03, 1.000000e04
96 };
97 static const float * const imc_exp_tab2 = imc_exp_tab + 8;
98 
99 
100 static const uint8_t imc_cb_select[4][32] = {
101  { 1, 1, 1, 1, 1, 1, 3, 3, 3, 3, 3, 3, 3, 3, 0, 0,
102  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 2, 2, 2 },
103  { 0, 2, 0, 3, 2, 3, 3, 0, 0, 0, 0, 0, 0, 0, 0, 0,
104  0, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 },
105  { 1, 1, 1, 1, 1, 1, 1, 3, 3, 3, 3, 3, 3, 3, 3, 3,
106  3, 3, 3, 3, 3, 0, 0, 0, 0, 0, 0, 0, 2, 2, 2, 2 },
107  { 0, 1, 2, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
108  3, 3, 3, 3, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }
109 };
110 
111 static const uint8_t imc_huffman_sizes[4] = {
112  17, 17, 18, 18
113 };
114 
115 static const uint8_t imc_huffman_lens[4][4][18] = {
116  {
117  { 1, 2, 5, 6, 11, 12, 15, 16, 16, 14, 13, 10, 9, 8, 7, 4, 3 },
118  { 2, 3, 3, 4, 4, 4, 6, 6, 7, 7, 7, 8, 9, 10, 11, 11, 2 },
119  { 1, 4, 4, 7, 9, 10, 12, 15, 15, 14, 13, 11, 8, 6, 5, 4, 2 },
120  { 2, 2, 4, 8, 9, 14, 15, 15, 13, 12, 11, 10, 7, 6, 5, 3, 2 },
121  },
122  {
123  { 2, 2, 3, 4, 7, 7, 10, 11, 12, 14, 14, 13, 9, 8, 7, 5, 2 },
124  { 2, 3, 14, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 3, 2 },
125  { 2, 3, 3, 4, 4, 5, 7, 9, 11, 12, 13, 13, 10, 8, 6, 4, 2 },
126  { 2, 3, 3, 4, 4, 5, 7, 9, 11, 12, 13, 13, 10, 8, 6, 4, 2 },
127  },
128  {
129  { 3, 5, 8, 9, 12, 15, 17, 17, 16, 14, 13, 11, 10, 7, 6, 4, 2, 1 },
130  { 4, 7, 8, 10, 11, 12, 15, 16, 16, 14, 13, 9, 6, 5, 3, 2, 2, 2 },
131  { 4, 5, 6, 7, 12, 13, 17, 17, 16, 15, 14, 11, 10, 9, 8, 3, 2, 1 },
132  { 2, 5, 7, 8, 14, 15, 16, 16, 13, 12, 11, 10, 9, 6, 4, 3, 2, 2 },
133  },
134  {
135  { 2, 4, 7, 9, 10, 12, 13, 15, 16, 16, 14, 11, 8, 6, 5, 3, 2, 2 },
136  { 3, 5, 5, 7, 10, 11, 11, 9, 8, 6, 5, 4, 4, 3, 3, 3, 3, 3 },
137  { 5, 8, 9, 9, 7, 6, 6, 6, 5, 5, 5, 4, 4, 4, 3, 3, 3, 2 },
138  { 2, 3, 5, 7, 8, 11, 12, 13, 15, 15, 14, 10, 9, 6, 4, 3, 3, 2 },
139  }
140 };
141 
142 static const uint8_t imc_huffman_syms[4][4][18] = {
143  {
144  { 7, 8, 5, 10, 3, 13, 1, 0, 15, 14, 2, 12, 11, 4, 16, 9, 6 },
145  { 8, 9, 6, 10, 5, 4, 11, 3, 16, 12, 2, 1, 13, 0, 14, 15, 7 },
146  { 8, 6, 9, 11, 12, 13, 14, 1, 0, 2, 15, 3, 4, 5, 10, 16, 7 },
147  { 8, 6, 5, 3, 12, 16, 15, 14, 0, 13, 1, 2, 11, 4, 10, 9, 7 },
148  },
149  {
150  { 8, 7, 9, 5, 16, 4, 2, 13, 1, 15, 0, 14, 12, 3, 11, 10, 6 },
151  { 8, 16, 0, 15, 1, 14, 2, 13, 12, 3, 11, 4, 10, 5, 6, 9, 7 },
152  { 8, 6, 9, 10, 16, 4, 3, 13, 14, 1, 0, 15, 2, 12, 11, 5, 7 },
153  { 8, 6, 9, 10, 16, 4, 3, 13, 14, 1, 0, 15, 2, 12, 11, 5, 7 },
154  },
155  {
156  { 6, 5, 4, 11, 2, 14, 15, 17, 0, 1, 13, 12, 3, 10, 16, 9, 8, 7 },
157  { 5, 11, 3, 12, 2, 13, 0, 17, 15, 14, 1, 16, 4, 10, 9, 6, 7, 8 },
158  { 16, 9, 5, 10, 1, 12, 15, 17, 14, 13, 0, 2, 11, 3, 4, 6, 8, 7 },
159  { 8, 5, 4, 12, 1, 15, 0, 17, 14, 2, 13, 16, 3, 11, 10, 9, 6, 7 },
160  },
161  {
162  { 7, 9, 4, 11, 2, 12, 0, 14, 17, 15, 13, 1, 3, 10, 5, 16, 8, 6 },
163  { 8, 17, 15, 5, 2, 1, 0, 3, 4, 16, 6, 7, 14, 13, 9, 10, 12, 11 },
164  { 4, 16, 0, 1, 2, 3, 17, 15, 14, 13, 11, 5, 12, 10, 9, 7, 6, 8 },
165  { 7, 9, 4, 11, 3, 13, 1, 0, 15, 17, 14, 2, 12, 16, 10, 6, 5, 8 },
166  }
167 };
168 
169 #endif /* AVCODEC_IMCDATA_H */
imc_exp_tab
static const float imc_exp_tab[32]
Definition: imcdata.h:87
imc_huffman_lens
static const uint8_t imc_huffman_lens[4][4][18]
Definition: imcdata.h:115
imc_quantizer2
static const float imc_quantizer2[2][56]
Definition: imcdata.h:66
imc_exp_tab2
static const float *const imc_exp_tab2
Definition: imcdata.h:97
cyclTab
static const int8_t cyclTab[32]
Definition: imcdata.h:36
imc_weights2
static const float imc_weights2[31]
Definition: imcdata.h:53
imc_weights1
static const float imc_weights1[31]
Definition: imcdata.h:47
band_tab
static const uint16_t band_tab[33]
Definition: imcdata.h:29
cyclTab2
static const int8_t cyclTab2[32]
Definition: imcdata.h:42
imc_huffman_syms
static const uint8_t imc_huffman_syms[4][4][18]
Definition: imcdata.h:142
imc_quantizer1
static const float imc_quantizer1[4][8]
Definition: imcdata.h:59
xTab
static const float xTab[14]
Definition: imcdata.h:84
imc_huffman_sizes
static const uint8_t imc_huffman_sizes[4]
Definition: imcdata.h:111
imc_cb_select
static const uint8_t imc_cb_select[4][32]
Definition: imcdata.h:100
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