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 "libavutil/attributes.h" |
32 |
|
|
|
33 |
|
|
#include "mqc.h" |
34 |
|
|
|
35 |
|
|
/* MQ coder context state structure */ |
36 |
|
|
typedef struct MqcCxState { |
37 |
|
|
uint16_t qe; |
38 |
|
|
uint8_t nmps; |
39 |
|
|
uint8_t nlps; |
40 |
|
|
uint8_t sw; |
41 |
|
|
} MqcCxState; |
42 |
|
|
|
43 |
|
|
static const MqcCxState cx_states[47] = { |
44 |
|
|
{ 0x5601, 1, 1, 1 }, |
45 |
|
|
{ 0x3401, 2, 6, 0 }, |
46 |
|
|
{ 0x1801, 3, 9, 0 }, |
47 |
|
|
{ 0x0AC1, 4, 12, 0 }, |
48 |
|
|
{ 0x0521, 5, 29, 0 }, |
49 |
|
|
{ 0x0221, 38, 33, 0 }, |
50 |
|
|
{ 0x5601, 7, 6, 1 }, |
51 |
|
|
{ 0x5401, 8, 14, 0 }, |
52 |
|
|
{ 0x4801, 9, 14, 0 }, |
53 |
|
|
{ 0x3801, 10, 14, 0 }, |
54 |
|
|
{ 0x3001, 11, 17, 0 }, |
55 |
|
|
{ 0x2401, 12, 18, 0 }, |
56 |
|
|
{ 0x1C01, 13, 20, 0 }, |
57 |
|
|
{ 0x1601, 29, 21, 0 }, |
58 |
|
|
{ 0x5601, 15, 14, 1 }, |
59 |
|
|
{ 0x5401, 16, 14, 0 }, |
60 |
|
|
{ 0x5101, 17, 15, 0 }, |
61 |
|
|
{ 0x4801, 18, 16, 0 }, |
62 |
|
|
{ 0x3801, 19, 17, 0 }, |
63 |
|
|
{ 0x3401, 20, 18, 0 }, |
64 |
|
|
{ 0x3001, 21, 19, 0 }, |
65 |
|
|
{ 0x2801, 22, 19, 0 }, |
66 |
|
|
{ 0x2401, 23, 20, 0 }, |
67 |
|
|
{ 0x2201, 24, 21, 0 }, |
68 |
|
|
{ 0x1C01, 25, 22, 0 }, |
69 |
|
|
{ 0x1801, 26, 23, 0 }, |
70 |
|
|
{ 0x1601, 27, 24, 0 }, |
71 |
|
|
{ 0x1401, 28, 25, 0 }, |
72 |
|
|
{ 0x1201, 29, 26, 0 }, |
73 |
|
|
{ 0x1101, 30, 27, 0 }, |
74 |
|
|
{ 0x0AC1, 31, 28, 0 }, |
75 |
|
|
{ 0x09C1, 32, 29, 0 }, |
76 |
|
|
{ 0x08A1, 33, 30, 0 }, |
77 |
|
|
{ 0x0521, 34, 31, 0 }, |
78 |
|
|
{ 0x0441, 35, 32, 0 }, |
79 |
|
|
{ 0x02A1, 36, 33, 0 }, |
80 |
|
|
{ 0x0221, 37, 34, 0 }, |
81 |
|
|
{ 0x0141, 38, 35, 0 }, |
82 |
|
|
{ 0x0111, 39, 36, 0 }, |
83 |
|
|
{ 0x0085, 40, 37, 0 }, |
84 |
|
|
{ 0x0049, 41, 38, 0 }, |
85 |
|
|
{ 0x0025, 42, 39, 0 }, |
86 |
|
|
{ 0x0015, 43, 40, 0 }, |
87 |
|
|
{ 0x0009, 44, 41, 0 }, |
88 |
|
|
{ 0x0005, 45, 42, 0 }, |
89 |
|
|
{ 0x0001, 45, 43, 0 }, |
90 |
|
|
{ 0x5601, 46, 46, 0 } |
91 |
|
|
}; |
92 |
|
|
|
93 |
|
|
uint16_t ff_mqc_qe [2 * 47]; |
94 |
|
|
uint8_t ff_mqc_nlps[2 * 47]; |
95 |
|
|
uint8_t ff_mqc_nmps[2 * 47]; |
96 |
|
|
|
97 |
|
18 |
void av_cold ff_mqc_init_context_tables(void) |
98 |
|
|
{ |
99 |
|
|
int i; |
100 |
✓✓ |
864 |
for (i = 0; i < 47; i++) { |
101 |
|
846 |
ff_mqc_qe[2 * i] = |
102 |
|
846 |
ff_mqc_qe[2 * i + 1] = cx_states[i].qe; |
103 |
|
|
|
104 |
|
846 |
ff_mqc_nlps[2 * i] = 2 * cx_states[i].nlps + cx_states[i].sw; |
105 |
|
846 |
ff_mqc_nlps[2 * i + 1] = 2 * cx_states[i].nlps + 1 - cx_states[i].sw; |
106 |
|
846 |
ff_mqc_nmps[2 * i] = 2 * cx_states[i].nmps; |
107 |
|
846 |
ff_mqc_nmps[2 * i + 1] = 2 * cx_states[i].nmps + 1; |
108 |
|
|
} |
109 |
|
18 |
} |
110 |
|
|
|
111 |
|
776128 |
void ff_mqc_init_contexts(MqcState *mqc) |
112 |
|
|
{ |
113 |
|
776128 |
memset(mqc->cx_states, 0, sizeof(mqc->cx_states)); |
114 |
|
776128 |
mqc->cx_states[MQC_CX_UNI] = 2 * 46; |
115 |
|
776128 |
mqc->cx_states[MQC_CX_RL] = 2 * 3; |
116 |
|
776128 |
mqc->cx_states[0] = 2 * 4; |
117 |
|
776128 |
} |