/src/ffmpeg/libavcodec/mqc.c
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1 | | /* |
2 | | * MQ-coder encoder and decoder common functions |
3 | | * Copyright (c) 2007 Kamil Nowosad |
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 | | * MQ-coder common (decoder/encoder) functions |
24 | | * @file |
25 | | * @author Kamil Nowosad |
26 | | */ |
27 | | |
28 | | #include <string.h> |
29 | | #include <stdint.h> |
30 | | |
31 | | #include "mqc.h" |
32 | | |
33 | | const uint16_t ff_mqc_qe[2 * 47] = { |
34 | | 0x5601, 0x5601, 0x3401, 0x3401, 0x1801, 0x1801, 0x0ac1, 0x0ac1, |
35 | | 0x0521, 0x0521, 0x0221, 0x0221, 0x5601, 0x5601, 0x5401, 0x5401, |
36 | | 0x4801, 0x4801, 0x3801, 0x3801, 0x3001, 0x3001, 0x2401, 0x2401, |
37 | | 0x1c01, 0x1c01, 0x1601, 0x1601, 0x5601, 0x5601, 0x5401, 0x5401, |
38 | | 0x5101, 0x5101, 0x4801, 0x4801, 0x3801, 0x3801, 0x3401, 0x3401, |
39 | | 0x3001, 0x3001, 0x2801, 0x2801, 0x2401, 0x2401, 0x2201, 0x2201, |
40 | | 0x1c01, 0x1c01, 0x1801, 0x1801, 0x1601, 0x1601, 0x1401, 0x1401, |
41 | | 0x1201, 0x1201, 0x1101, 0x1101, 0x0ac1, 0x0ac1, 0x09c1, 0x09c1, |
42 | | 0x08a1, 0x08a1, 0x0521, 0x0521, 0x0441, 0x0441, 0x02a1, 0x02a1, |
43 | | 0x0221, 0x0221, 0x0141, 0x0141, 0x0111, 0x0111, 0x0085, 0x0085, |
44 | | 0x0049, 0x0049, 0x0025, 0x0025, 0x0015, 0x0015, 0x0009, 0x0009, |
45 | | 0x0005, 0x0005, 0x0001, 0x0001, 0x5601, 0x5601 |
46 | | }; |
47 | | const uint8_t ff_mqc_nlps[2 * 47] = { |
48 | | 3, 2, 12, 13, 18, 19, 24, 25, 58, 59, 66, 67, 13, 12, 28, 29, |
49 | | 28, 29, 28, 29, 34, 35, 36, 37, 40, 41, 42, 43, 29, 28, 28, 29, |
50 | | 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 38, 39, 40, 41, 42, 43, |
51 | | 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, |
52 | | 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, |
53 | | 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 92, 93 |
54 | | }; |
55 | | const uint8_t ff_mqc_nmps[2 * 47] = { |
56 | | 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 76, 77, 14, 15, 16, 17, |
57 | | 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 58, 59, 30, 31, 32, 33, |
58 | | 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, |
59 | | 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, |
60 | | 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, |
61 | | 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 90, 91, 92, 93 |
62 | | }; |
63 | | |
64 | | void ff_mqc_init_contexts(MqcState *mqc) |
65 | 2.63M | { |
66 | 2.63M | memset(mqc->cx_states, 0, sizeof(mqc->cx_states)); |
67 | 2.63M | mqc->cx_states[MQC_CX_UNI] = 2 * 46; |
68 | 2.63M | mqc->cx_states[MQC_CX_RL] = 2 * 3; |
69 | 2.63M | mqc->cx_states[0] = 2 * 4; |
70 | 2.63M | } |