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rv40data.h
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1 /*
2  * RealVideo 4 decoder
3  * copyright (c) 2007 Konstantin Shishkov
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * FFmpeg is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 /**
23  * @file
24  * miscellaneous RV40 tables
25  */
26 
27 #ifndef AVCODEC_RV40DATA_H
28 #define AVCODEC_RV40DATA_H
29 
30 #include <stdint.h>
31 
32 /**
33  * standard widths and heights coded in RV40
34  */
35 //@{
36 static const int rv40_standard_widths[] = { 160, 172, 240, 320, 352, 640, 704, 0};
37 static const int rv40_standard_heights[] = { 120, 132, 144, 240, 288, 480, -8, -10, 180, 360, 576, 0};
38 //@}
39 
40 #define MODE2_PATTERNS_NUM 20
41 /**
42  * intra types table
43  *
44  * These values are actually coded 3-tuples
45  * used for detecting standard block configurations.
46  */
47 static const uint16_t rv40_aic_table_index[MODE2_PATTERNS_NUM] = {
48  0x000, 0x100, 0x200,
49  0x011, 0x111, 0x211, 0x511, 0x611,
50  0x022, 0x122, 0x222, 0x722,
51  0x272, 0x227,
52  0x822, 0x282, 0x228,
53  0x112, 0x116, 0x221
54 };
55 
56 /**
57  * luma quantizer values
58  * The second table is used for inter blocks.
59  */
60 static const uint8_t rv40_luma_dc_quant[2][32] = {
61  { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
62  16, 17, 17, 18, 18, 18, 19, 19, 19, 20, 20, 20, 22, 22, 22, 22 },
63  { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
64  16, 17, 18, 19, 20, 20, 21, 21, 22, 23, 23, 23, 24, 24, 24, 24 }
65 };
66 
67 /**
68  * @name Coefficients used by the RV40 loop filter
69  * @{
70  */
71 
72 /** alpha parameter for RV40 loop filter - almost the same as in JVT-A003r1 */
73 static const uint8_t rv40_alpha_tab[32] = {
74  128, 128, 128, 128, 128, 128, 128, 128,
75  128, 128, 122, 96, 75, 59, 47, 37,
76  29, 23, 18, 15, 13, 11, 10, 9,
77  8, 7, 6, 5, 4, 3, 2, 1
78 };
79 /** beta parameter for RV40 loop filter - almost the same as in JVT-A003r1 */
80 static const uint8_t rv40_beta_tab[32] = {
81  0, 0, 0, 0, 0, 0, 0, 0, 3, 3, 3, 4, 4, 4, 6, 6,
82  6, 7, 8, 8, 9, 9, 10, 10, 11, 11, 12, 13, 14, 15, 16, 17
83 };
84 /** clip table for RV40 loop filter - the same as in JVT-A003r1 */
85 static const uint8_t rv40_filter_clip_tbl[3][32] = {
86  {
87  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
88  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
89  },
90  {
91  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1,
92  1, 1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 4, 5, 5
93  },
94  {
95  0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1,
96  1, 2, 2, 2, 2, 3, 3, 3, 4, 4, 5, 5, 5, 7, 8, 9
97  }
98 };
99 /** @} */ // end loopfilter group
100 
101 #endif /* AVCODEC_RV40DATA_H */