xref: /openbmc/linux/lib/zstd/compress/clevels.h (revision 2aa14b1a)
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