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
ff_mqc_init_contexts(MqcState *mqc)64 void ff_mqc_init_contexts(MqcState *mqc)
65 {
66 memset(mqc->cx_states, 0, sizeof(mqc->cx_states));
67 mqc->cx_states[MQC_CX_UNI] = 2 * 46;
68 mqc->cx_states[MQC_CX_RL] = 2 * 3;
69 mqc->cx_states[0] = 2 * 4;
70 }
71