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clevels.h
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1/*
2 * Copyright (c) Meta Platforms, Inc. and affiliates.
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 "../zstd.h"
16
17/*-===== Pre-defined compression levels =====-*/
18
19#define ZSTD_MAX_CLEVEL 22
20
21#ifdef __GNUC__
22__attribute__((__unused__))
23#endif
24
25static const ZSTD_compressionParameters ZSTD_defaultCParameters[4][ZSTD_MAX_CLEVEL+1] = {
26{ /* "default" - for any srcSize > 256 KB */
27 /* W, C, H, S, L, TL, strat */
28 { 19, 12, 13, 1, 6, 1, ZSTD_fast }, /* base for negative levels */
29 { 19, 13, 14, 1, 7, 0, ZSTD_fast }, /* level 1 */
30 { 20, 15, 16, 1, 6, 0, ZSTD_fast }, /* level 2 */
31 { 21, 16, 17, 1, 5, 0, ZSTD_dfast }, /* level 3 */
32 { 21, 18, 18, 1, 5, 0, ZSTD_dfast }, /* level 4 */
33 { 21, 18, 19, 3, 5, 2, ZSTD_greedy }, /* level 5 */
34 { 21, 18, 19, 3, 5, 4, ZSTD_lazy }, /* level 6 */
35 { 21, 19, 20, 4, 5, 8, ZSTD_lazy }, /* level 7 */
36 { 21, 19, 20, 4, 5, 16, ZSTD_lazy2 }, /* level 8 */
37 { 22, 20, 21, 4, 5, 16, ZSTD_lazy2 }, /* level 9 */
38 { 22, 21, 22, 5, 5, 16, ZSTD_lazy2 }, /* level 10 */
39 { 22, 21, 22, 6, 5, 16, ZSTD_lazy2 }, /* level 11 */
40 { 22, 22, 23, 6, 5, 32, ZSTD_lazy2 }, /* level 12 */
41 { 22, 22, 22, 4, 5, 32, ZSTD_btlazy2 }, /* level 13 */
42 { 22, 22, 23, 5, 5, 32, ZSTD_btlazy2 }, /* level 14 */
43 { 22, 23, 23, 6, 5, 32, ZSTD_btlazy2 }, /* level 15 */
44 { 22, 22, 22, 5, 5, 48, ZSTD_btopt }, /* level 16 */
45 { 23, 23, 22, 5, 4, 64, ZSTD_btopt }, /* level 17 */
46 { 23, 23, 22, 6, 3, 64, ZSTD_btultra }, /* level 18 */
47 { 23, 24, 22, 7, 3,256, ZSTD_btultra2}, /* level 19 */
48 { 25, 25, 23, 7, 3,256, ZSTD_btultra2}, /* level 20 */
49 { 26, 26, 24, 7, 3,512, ZSTD_btultra2}, /* level 21 */
50 { 27, 27, 25, 9, 3,999, ZSTD_btultra2}, /* level 22 */
51},
52{ /* for srcSize <= 256 KB */
53 /* W, C, H, S, L, T, strat */
54 { 18, 12, 13, 1, 5, 1, ZSTD_fast }, /* base for negative levels */
55 { 18, 13, 14, 1, 6, 0, ZSTD_fast }, /* level 1 */
56 { 18, 14, 14, 1, 5, 0, ZSTD_dfast }, /* level 2 */
57 { 18, 16, 16, 1, 4, 0, ZSTD_dfast }, /* level 3 */
58 { 18, 16, 17, 3, 5, 2, ZSTD_greedy }, /* level 4.*/
59 { 18, 17, 18, 5, 5, 2, ZSTD_greedy }, /* level 5.*/
60 { 18, 18, 19, 3, 5, 4, ZSTD_lazy }, /* level 6.*/
61 { 18, 18, 19, 4, 4, 4, ZSTD_lazy }, /* level 7 */
62 { 18, 18, 19, 4, 4, 8, ZSTD_lazy2 }, /* level 8 */
63 { 18, 18, 19, 5, 4, 8, ZSTD_lazy2 }, /* level 9 */
64 { 18, 18, 19, 6, 4, 8, ZSTD_lazy2 }, /* level 10 */
65 { 18, 18, 19, 5, 4, 12, ZSTD_btlazy2 }, /* level 11.*/
66 { 18, 19, 19, 7, 4, 12, ZSTD_btlazy2 }, /* level 12.*/
67 { 18, 18, 19, 4, 4, 16, ZSTD_btopt }, /* level 13 */
68 { 18, 18, 19, 4, 3, 32, ZSTD_btopt }, /* level 14.*/
69 { 18, 18, 19, 6, 3,128, ZSTD_btopt }, /* level 15.*/
70 { 18, 19, 19, 6, 3,128, ZSTD_btultra }, /* level 16.*/
71 { 18, 19, 19, 8, 3,256, ZSTD_btultra }, /* level 17.*/
72 { 18, 19, 19, 6, 3,128, ZSTD_btultra2}, /* level 18.*/
73 { 18, 19, 19, 8, 3,256, ZSTD_btultra2}, /* level 19.*/
74 { 18, 19, 19, 10, 3,512, ZSTD_btultra2}, /* level 20.*/
75 { 18, 19, 19, 12, 3,512, ZSTD_btultra2}, /* level 21.*/
76 { 18, 19, 19, 13, 3,999, ZSTD_btultra2}, /* level 22.*/
77},
78{ /* for srcSize <= 128 KB */
79 /* W, C, H, S, L, T, strat */
80 { 17, 12, 12, 1, 5, 1, ZSTD_fast }, /* base for negative levels */
81 { 17, 12, 13, 1, 6, 0, ZSTD_fast }, /* level 1 */
82 { 17, 13, 15, 1, 5, 0, ZSTD_fast }, /* level 2 */
83 { 17, 15, 16, 2, 5, 0, ZSTD_dfast }, /* level 3 */
84 { 17, 17, 17, 2, 4, 0, ZSTD_dfast }, /* level 4 */
85 { 17, 16, 17, 3, 4, 2, ZSTD_greedy }, /* level 5 */
86 { 17, 16, 17, 3, 4, 4, ZSTD_lazy }, /* level 6 */
87 { 17, 16, 17, 3, 4, 8, ZSTD_lazy2 }, /* level 7 */
88 { 17, 16, 17, 4, 4, 8, ZSTD_lazy2 }, /* level 8 */
89 { 17, 16, 17, 5, 4, 8, ZSTD_lazy2 }, /* level 9 */
90 { 17, 16, 17, 6, 4, 8, ZSTD_lazy2 }, /* level 10 */
91 { 17, 17, 17, 5, 4, 8, ZSTD_btlazy2 }, /* level 11 */
92 { 17, 18, 17, 7, 4, 12, ZSTD_btlazy2 }, /* level 12 */
93 { 17, 18, 17, 3, 4, 12, ZSTD_btopt }, /* level 13.*/
94 { 17, 18, 17, 4, 3, 32, ZSTD_btopt }, /* level 14.*/
95 { 17, 18, 17, 6, 3,256, ZSTD_btopt }, /* level 15.*/
96 { 17, 18, 17, 6, 3,128, ZSTD_btultra }, /* level 16.*/
97 { 17, 18, 17, 8, 3,256, ZSTD_btultra }, /* level 17.*/
98 { 17, 18, 17, 10, 3,512, ZSTD_btultra }, /* level 18.*/
99 { 17, 18, 17, 5, 3,256, ZSTD_btultra2}, /* level 19.*/
100 { 17, 18, 17, 7, 3,512, ZSTD_btultra2}, /* level 20.*/
101 { 17, 18, 17, 9, 3,512, ZSTD_btultra2}, /* level 21.*/
102 { 17, 18, 17, 11, 3,999, ZSTD_btultra2}, /* level 22.*/
103},
104{ /* for srcSize <= 16 KB */
105 /* W, C, H, S, L, T, strat */
106 { 14, 12, 13, 1, 5, 1, ZSTD_fast }, /* base for negative levels */
107 { 14, 14, 15, 1, 5, 0, ZSTD_fast }, /* level 1 */
108 { 14, 14, 15, 1, 4, 0, ZSTD_fast }, /* level 2 */
109 { 14, 14, 15, 2, 4, 0, ZSTD_dfast }, /* level 3 */
110 { 14, 14, 14, 4, 4, 2, ZSTD_greedy }, /* level 4 */
111 { 14, 14, 14, 3, 4, 4, ZSTD_lazy }, /* level 5.*/
112 { 14, 14, 14, 4, 4, 8, ZSTD_lazy2 }, /* level 6 */
113 { 14, 14, 14, 6, 4, 8, ZSTD_lazy2 }, /* level 7 */
114 { 14, 14, 14, 8, 4, 8, ZSTD_lazy2 }, /* level 8.*/
115 { 14, 15, 14, 5, 4, 8, ZSTD_btlazy2 }, /* level 9.*/
116 { 14, 15, 14, 9, 4, 8, ZSTD_btlazy2 }, /* level 10.*/
117 { 14, 15, 14, 3, 4, 12, ZSTD_btopt }, /* level 11.*/
118 { 14, 15, 14, 4, 3, 24, ZSTD_btopt }, /* level 12.*/
119 { 14, 15, 14, 5, 3, 32, ZSTD_btultra }, /* level 13.*/
120 { 14, 15, 15, 6, 3, 64, ZSTD_btultra }, /* level 14.*/
121 { 14, 15, 15, 7, 3,256, ZSTD_btultra }, /* level 15.*/
122 { 14, 15, 15, 5, 3, 48, ZSTD_btultra2}, /* level 16.*/
123 { 14, 15, 15, 6, 3,128, ZSTD_btultra2}, /* level 17.*/
124 { 14, 15, 15, 7, 3,256, ZSTD_btultra2}, /* level 18.*/
125 { 14, 15, 15, 8, 3,256, ZSTD_btultra2}, /* level 19.*/
126 { 14, 15, 15, 8, 3,512, ZSTD_btultra2}, /* level 20.*/
127 { 14, 15, 15, 9, 3,512, ZSTD_btultra2}, /* level 21.*/
128 { 14, 15, 15, 10, 3,999, ZSTD_btultra2}, /* level 22.*/
129},
130};
131
132
133
134#endif /* ZSTD_CLEVELS_H */
ZSTD_MAX_CLEVEL
#define ZSTD_MAX_CLEVEL
Definition: clevels.h:19
ZSTD_btlazy2
@ ZSTD_btlazy2
Definition: zstd.h:320
ZSTD_lazy
@ ZSTD_lazy
Definition: zstd.h:318
ZSTD_btultra
@ ZSTD_btultra
Definition: zstd.h:322
ZSTD_greedy
@ ZSTD_greedy
Definition: zstd.h:317
ZSTD_dfast
@ ZSTD_dfast
Definition: zstd.h:316
ZSTD_fast
@ ZSTD_fast
Definition: zstd.h:315
ZSTD_lazy2
@ ZSTD_lazy2
Definition: zstd.h:319
ZSTD_btopt
@ ZSTD_btopt
Definition: zstd.h:321
ZSTD_btultra2
@ ZSTD_btultra2
Definition: zstd.h:323