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 25 static 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 */ 135
Indexes created Sun Aug 09 00:24:28 UTC 2026