1 /*
2 * Copyright (c) Yann Collet, Facebook, Inc.
3 * All rights reserved.
4 *
5 * This source code is licensed under both the BSD-style license (found in the
6 * LICENSE file in the root directory of this source tree) and the GPLv2 (found
7 * in the COPYING file in the root directory of this source tree).
8 * You may select, at your option, one of the above-listed licenses.
9 */
10
11 #ifndef ZSTD_CLEVELS_H
12 #define ZSTD_CLEVELS_H
13
14 #define ZSTD_STATIC_LINKING_ONLY /* ZSTD_compressionParameters */
15 #include <linux/zstd.h>
16
17 /*-===== Pre-defined compression levels =====-*/
18
19 #define ZSTD_MAX_CLEVEL 22
20
21 __attribute__((__unused__))
22
23 static const ZSTD_compressionParameters ZSTD_defaultCParameters[4][ZSTD_MAX_CLEVEL+1] = {
24 { /* "default" - for any srcSize > 256 KB */
25 /* W, C, H, S, L, TL, strat */
26 { 19, 12, 13, 1, 6, 1, ZSTD_fast }, /* base for negative levels */
27 { 19, 13, 14, 1, 7, 0, ZSTD_fast }, /* level 1 */
28 { 20, 15, 16, 1, 6, 0, ZSTD_fast }, /* level 2 */
29 { 21, 16, 17, 1, 5, 0, ZSTD_dfast }, /* level 3 */
30 { 21, 18, 18, 1, 5, 0, ZSTD_dfast }, /* level 4 */
31 { 21, 18, 19, 3, 5, 2, ZSTD_greedy }, /* level 5 */
32 { 21, 18, 19, 3, 5, 4, ZSTD_lazy }, /* level 6 */
33 { 21, 19, 20, 4, 5, 8, ZSTD_lazy }, /* level 7 */
34 { 21, 19, 20, 4, 5, 16, ZSTD_lazy2 }, /* level 8 */
35 { 22, 20, 21, 4, 5, 16, ZSTD_lazy2 }, /* level 9 */
36 { 22, 21, 22, 5, 5, 16, ZSTD_lazy2 }, /* level 10 */
37 { 22, 21, 22, 6, 5, 16, ZSTD_lazy2 }, /* level 11 */
38 { 22, 22, 23, 6, 5, 32, ZSTD_lazy2 }, /* level 12 */
39 { 22, 22, 22, 4, 5, 32, ZSTD_btlazy2 }, /* level 13 */
40 { 22, 22, 23, 5, 5, 32, ZSTD_btlazy2 }, /* level 14 */
41 { 22, 23, 23, 6, 5, 32, ZSTD_btlazy2 }, /* level 15 */
42 { 22, 22, 22, 5, 5, 48, ZSTD_btopt }, /* level 16 */
43 { 23, 23, 22, 5, 4, 64, ZSTD_btopt }, /* level 17 */
44 { 23, 23, 22, 6, 3, 64, ZSTD_btultra }, /* level 18 */
45 { 23, 24, 22, 7, 3,256, ZSTD_btultra2}, /* level 19 */
46 { 25, 25, 23, 7, 3,256, ZSTD_btultra2}, /* level 20 */
47 { 26, 26, 24, 7, 3,512, ZSTD_btultra2}, /* level 21 */
48 { 27, 27, 25, 9, 3,999, ZSTD_btultra2}, /* level 22 */
49 },
50 { /* for srcSize <= 256 KB */
51 /* W, C, H, S, L, T, strat */
52 { 18, 12, 13, 1, 5, 1, ZSTD_fast }, /* base for negative levels */
53 { 18, 13, 14, 1, 6, 0, ZSTD_fast }, /* level 1 */
54 { 18, 14, 14, 1, 5, 0, ZSTD_dfast }, /* level 2 */
55 { 18, 16, 16, 1, 4, 0, ZSTD_dfast }, /* level 3 */
56 { 18, 16, 17, 3, 5, 2, ZSTD_greedy }, /* level 4.*/
57 { 18, 17, 18, 5, 5, 2, ZSTD_greedy }, /* level 5.*/
58 { 18, 18, 19, 3, 5, 4, ZSTD_lazy }, /* level 6.*/
59 { 18, 18, 19, 4, 4, 4, ZSTD_lazy }, /* level 7 */
60 { 18, 18, 19, 4, 4, 8, ZSTD_lazy2 }, /* level 8 */
61 { 18, 18, 19, 5, 4, 8, ZSTD_lazy2 }, /* level 9 */
62 { 18, 18, 19, 6, 4, 8, ZSTD_lazy2 }, /* level 10 */
63 { 18, 18, 19, 5, 4, 12, ZSTD_btlazy2 }, /* level 11.*/
64 { 18, 19, 19, 7, 4, 12, ZSTD_btlazy2 }, /* level 12.*/
65 { 18, 18, 19, 4, 4, 16, ZSTD_btopt }, /* level 13 */
66 { 18, 18, 19, 4, 3, 32, ZSTD_btopt }, /* level 14.*/
67 { 18, 18, 19, 6, 3,128, ZSTD_btopt }, /* level 15.*/
68 { 18, 19, 19, 6, 3,128, ZSTD_btultra }, /* level 16.*/
69 { 18, 19, 19, 8, 3,256, ZSTD_btultra }, /* level 17.*/
70 { 18, 19, 19, 6, 3,128, ZSTD_btultra2}, /* level 18.*/
71 { 18, 19, 19, 8, 3,256, ZSTD_btultra2}, /* level 19.*/
72 { 18, 19, 19, 10, 3,512, ZSTD_btultra2}, /* level 20.*/
73 { 18, 19, 19, 12, 3,512, ZSTD_btultra2}, /* level 21.*/
74 { 18, 19, 19, 13, 3,999, ZSTD_btultra2}, /* level 22.*/
75 },
76 { /* for srcSize <= 128 KB */
77 /* W, C, H, S, L, T, strat */
78 { 17, 12, 12, 1, 5, 1, ZSTD_fast }, /* base for negative levels */
79 { 17, 12, 13, 1, 6, 0, ZSTD_fast }, /* level 1 */
80 { 17, 13, 15, 1, 5, 0, ZSTD_fast }, /* level 2 */
81 { 17, 15, 16, 2, 5, 0, ZSTD_dfast }, /* level 3 */
82 { 17, 17, 17, 2, 4, 0, ZSTD_dfast }, /* level 4 */
83 { 17, 16, 17, 3, 4, 2, ZSTD_greedy }, /* level 5 */
84 { 17, 16, 17, 3, 4, 4, ZSTD_lazy }, /* level 6 */
85 { 17, 16, 17, 3, 4, 8, ZSTD_lazy2 }, /* level 7 */
86 { 17, 16, 17, 4, 4, 8, ZSTD_lazy2 }, /* level 8 */
87 { 17, 16, 17, 5, 4, 8, ZSTD_lazy2 }, /* level 9 */
88 { 17, 16, 17, 6, 4, 8, ZSTD_lazy2 }, /* level 10 */
89 { 17, 17, 17, 5, 4, 8, ZSTD_btlazy2 }, /* level 11 */
90 { 17, 18, 17, 7, 4, 12, ZSTD_btlazy2 }, /* level 12 */
91 { 17, 18, 17, 3, 4, 12, ZSTD_btopt }, /* level 13.*/
92 { 17, 18, 17, 4, 3, 32, ZSTD_btopt }, /* level 14.*/
93 { 17, 18, 17, 6, 3,256, ZSTD_btopt }, /* level 15.*/
94 { 17, 18, 17, 6, 3,128, ZSTD_btultra }, /* level 16.*/
95 { 17, 18, 17, 8, 3,256, ZSTD_btultra }, /* level 17.*/
96 { 17, 18, 17, 10, 3,512, ZSTD_btultra }, /* level 18.*/
97 { 17, 18, 17, 5, 3,256, ZSTD_btultra2}, /* level 19.*/
98 { 17, 18, 17, 7, 3,512, ZSTD_btultra2}, /* level 20.*/
99 { 17, 18, 17, 9, 3,512, ZSTD_btultra2}, /* level 21.*/
100 { 17, 18, 17, 11, 3,999, ZSTD_btultra2}, /* level 22.*/
101 },
102 { /* for srcSize <= 16 KB */
103 /* W, C, H, S, L, T, strat */
104 { 14, 12, 13, 1, 5, 1, ZSTD_fast }, /* base for negative levels */
105 { 14, 14, 15, 1, 5, 0, ZSTD_fast }, /* level 1 */
106 { 14, 14, 15, 1, 4, 0, ZSTD_fast }, /* level 2 */
107 { 14, 14, 15, 2, 4, 0, ZSTD_dfast }, /* level 3 */
108 { 14, 14, 14, 4, 4, 2, ZSTD_greedy }, /* level 4 */
109 { 14, 14, 14, 3, 4, 4, ZSTD_lazy }, /* level 5.*/
110 { 14, 14, 14, 4, 4, 8, ZSTD_lazy2 }, /* level 6 */
111 { 14, 14, 14, 6, 4, 8, ZSTD_lazy2 }, /* level 7 */
112 { 14, 14, 14, 8, 4, 8, ZSTD_lazy2 }, /* level 8.*/
113 { 14, 15, 14, 5, 4, 8, ZSTD_btlazy2 }, /* level 9.*/
114 { 14, 15, 14, 9, 4, 8, ZSTD_btlazy2 }, /* level 10.*/
115 { 14, 15, 14, 3, 4, 12, ZSTD_btopt }, /* level 11.*/
116 { 14, 15, 14, 4, 3, 24, ZSTD_btopt }, /* level 12.*/
117 { 14, 15, 14, 5, 3, 32, ZSTD_btultra }, /* level 13.*/
118 { 14, 15, 15, 6, 3, 64, ZSTD_btultra }, /* level 14.*/
119 { 14, 15, 15, 7, 3,256, ZSTD_btultra }, /* level 15.*/
120 { 14, 15, 15, 5, 3, 48, ZSTD_btultra2}, /* level 16.*/
121 { 14, 15, 15, 6, 3,128, ZSTD_btultra2}, /* level 17.*/
122 { 14, 15, 15, 7, 3,256, ZSTD_btultra2}, /* level 18.*/
123 { 14, 15, 15, 8, 3,256, ZSTD_btultra2}, /* level 19.*/
124 { 14, 15, 15, 8, 3,512, ZSTD_btultra2}, /* level 20.*/
125 { 14, 15, 15, 9, 3,512, ZSTD_btultra2}, /* level 21.*/
126 { 14, 15, 15, 10, 3,999, ZSTD_btultra2}, /* level 22.*/
127 },
128 };
129
130
131
132 #endif /* ZSTD_CLEVELS_H */
133
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