Imported Debian version 2.5.3~trusty1
[deb_ffmpeg.git] / ffmpeg / libavcodec / adpcm_data.c
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2ba45a60
DM
1/*
2 * Copyright (c) 2001-2003 The FFmpeg Project
3 *
4 * This file is part of FFmpeg.
5 *
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
10 *
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
21/**
22 * @file
23 * ADPCM tables
24 */
25
26#include <stdint.h>
27
28/* ff_adpcm_step_table[] and ff_adpcm_index_table[] are from the ADPCM
29 reference source */
30static const int8_t adpcm_index_table2[4] = {
31 -1, 2,
32 -1, 2,
33};
34
35static const int8_t adpcm_index_table3[8] = {
36 -1, -1, 1, 2,
37 -1, -1, 1, 2,
38};
39
40const int8_t ff_adpcm_index_table[16] = {
41 -1, -1, -1, -1, 2, 4, 6, 8,
42 -1, -1, -1, -1, 2, 4, 6, 8,
43};
44
45static const int8_t adpcm_index_table5[32] = {
46 -1, -1, -1, -1, -1, -1, -1, -1, 1, 2, 4, 6, 8, 10, 13, 16,
47 -1, -1, -1, -1, -1, -1, -1, -1, 1, 2, 4, 6, 8, 10, 13, 16,
48};
49
50const int8_t * const ff_adpcm_index_tables[4] = {
51 &adpcm_index_table2[0],
52 &adpcm_index_table3[0],
53 &ff_adpcm_index_table[0],
54 &adpcm_index_table5[0],
55};
56
57/**
58 * This is the step table. Note that many programs use slight deviations from
59 * this table, but such deviations are negligible:
60 */
61const int16_t ff_adpcm_step_table[89] = {
62 7, 8, 9, 10, 11, 12, 13, 14, 16, 17,
63 19, 21, 23, 25, 28, 31, 34, 37, 41, 45,
64 50, 55, 60, 66, 73, 80, 88, 97, 107, 118,
65 130, 143, 157, 173, 190, 209, 230, 253, 279, 307,
66 337, 371, 408, 449, 494, 544, 598, 658, 724, 796,
67 876, 963, 1060, 1166, 1282, 1411, 1552, 1707, 1878, 2066,
68 2272, 2499, 2749, 3024, 3327, 3660, 4026, 4428, 4871, 5358,
69 5894, 6484, 7132, 7845, 8630, 9493, 10442, 11487, 12635, 13899,
70 15289, 16818, 18500, 20350, 22385, 24623, 27086, 29794, 32767
71};
72
73const int16_t ff_adpcm_oki_step_table[49] = {
74 16, 17, 19, 21, 23, 25, 28, 31, 34, 37,
75 41, 45, 50, 55, 60, 66, 73, 80, 88, 97,
76 107, 118, 130, 143, 157, 173, 190, 209, 230, 253,
77 279, 307, 337, 371, 408, 449, 494, 544, 598, 658,
78 724, 796, 876, 963, 1060, 1166, 1282, 1411, 1552
79};
80
81/* These are for MS-ADPCM */
82/* ff_adpcm_AdaptationTable[], ff_adpcm_AdaptCoeff1[], and
83 ff_adpcm_AdaptCoeff2[] are from libsndfile */
84const int16_t ff_adpcm_AdaptationTable[] = {
85 230, 230, 230, 230, 307, 409, 512, 614,
86 768, 614, 512, 409, 307, 230, 230, 230
87};
88
89/** Divided by 4 to fit in 8-bit integers */
90const uint8_t ff_adpcm_AdaptCoeff1[] = {
91 64, 128, 0, 48, 60, 115, 98
92};
93
94/** Divided by 4 to fit in 8-bit integers */
95const int8_t ff_adpcm_AdaptCoeff2[] = {
96 0, -64, 0, 16, 0, -52, -58
97};
98
99const int16_t ff_adpcm_yamaha_indexscale[] = {
100 230, 230, 230, 230, 307, 409, 512, 614,
101 230, 230, 230, 230, 307, 409, 512, 614
102};
103
104const int8_t ff_adpcm_yamaha_difflookup[] = {
105 1, 3, 5, 7, 9, 11, 13, 15,
106 -1, -3, -5, -7, -9, -11, -13, -15
107};
108
109const int16_t ff_adpcm_afc_coeffs[2][16] = {
110 { 0, 2048, 0, 1024, 4096, 3584, 3072, 4608, 4200, 4800, 5120, 2048, 1024, 64512, 64512, 63488 },
111 { 0, 0, 2048, 1024, 63488, 64000, 64512, 62976, 63288, 63236, 62464, 63488, 64512, 1024, 0, 0 }
112};