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freebsd
GitHub Repository: freebsd/freebsd-src
 Path: blob/main/sys/contrib/openzfs/module/zstd/lib/compress/clevels.h
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// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-only

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/*

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 * Copyright (c) Meta Platforms, Inc. and affiliates.

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 * All rights reserved.

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 *

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 * This source code is licensed under both the BSD-style license (found in the

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 * LICENSE file in the root directory of this source tree) and the GPLv2 (found

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 * in the COPYING file in the root directory of this source tree).

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 * You may select, at your option, one of the above-listed licenses.

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 */

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#ifndef ZSTD_CLEVELS_H

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#define ZSTD_CLEVELS_H

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#define ZSTD_STATIC_LINKING_ONLY  /* ZSTD_compressionParameters  */

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#include "../zstd.h"

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/*-=====  Pre-defined compression levels  =====-*/

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#define ZSTD_MAX_CLEVEL     22

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#ifdef __GNUC__

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__attribute__((__unused__))

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#endif

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static const ZSTD_compressionParameters ZSTD_defaultCParameters[4][ZSTD_MAX_CLEVEL+1] = {

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{   /* "default" - for any srcSize > 256 KB */

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    /* W,  C,  H,  S,  L, TL, strat */

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    { 19, 12, 13,  1,  6,  1, ZSTD_fast    },  /* base for negative levels */

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    { 19, 13, 14,  1,  7,  0, ZSTD_fast    },  /* level  1 */

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    { 20, 15, 16,  1,  6,  0, ZSTD_fast    },  /* level  2 */

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    { 21, 16, 17,  1,  5,  0, ZSTD_dfast   },  /* level  3 */

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    { 21, 18, 18,  1,  5,  0, ZSTD_dfast   },  /* level  4 */

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    { 21, 18, 19,  3,  5,  2, ZSTD_greedy  },  /* level  5 */

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    { 21, 18, 19,  3,  5,  4, ZSTD_lazy    },  /* level  6 */

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    { 21, 19, 20,  4,  5,  8, ZSTD_lazy    },  /* level  7 */

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    { 21, 19, 20,  4,  5, 16, ZSTD_lazy2   },  /* level  8 */

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    { 22, 20, 21,  4,  5, 16, ZSTD_lazy2   },  /* level  9 */

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    { 22, 21, 22,  5,  5, 16, ZSTD_lazy2   },  /* level 10 */

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    { 22, 21, 22,  6,  5, 16, ZSTD_lazy2   },  /* level 11 */

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    { 22, 22, 23,  6,  5, 32, ZSTD_lazy2   },  /* level 12 */

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    { 22, 22, 22,  4,  5, 32, ZSTD_btlazy2 },  /* level 13 */

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    { 22, 22, 23,  5,  5, 32, ZSTD_btlazy2 },  /* level 14 */

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    { 22, 23, 23,  6,  5, 32, ZSTD_btlazy2 },  /* level 15 */

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    { 22, 22, 22,  5,  5, 48, ZSTD_btopt   },  /* level 16 */

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    { 23, 23, 22,  5,  4, 64, ZSTD_btopt   },  /* level 17 */

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    { 23, 23, 22,  6,  3, 64, ZSTD_btultra },  /* level 18 */

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    { 23, 24, 22,  7,  3,256, ZSTD_btultra2},  /* level 19 */

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    { 25, 25, 23,  7,  3,256, ZSTD_btultra2},  /* level 20 */

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    { 26, 26, 24,  7,  3,512, ZSTD_btultra2},  /* level 21 */

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    { 27, 27, 25,  9,  3,999, ZSTD_btultra2},  /* level 22 */

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},

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{   /* for srcSize <= 256 KB */

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    /* W,  C,  H,  S,  L,  T, strat */

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    { 18, 12, 13,  1,  5,  1, ZSTD_fast    },  /* base for negative levels */

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    { 18, 13, 14,  1,  6,  0, ZSTD_fast    },  /* level  1 */

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    { 18, 14, 14,  1,  5,  0, ZSTD_dfast   },  /* level  2 */

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    { 18, 16, 16,  1,  4,  0, ZSTD_dfast   },  /* level  3 */

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    { 18, 16, 17,  3,  5,  2, ZSTD_greedy  },  /* level  4.*/

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    { 18, 17, 18,  5,  5,  2, ZSTD_greedy  },  /* level  5.*/

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    { 18, 18, 19,  3,  5,  4, ZSTD_lazy    },  /* level  6.*/

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    { 18, 18, 19,  4,  4,  4, ZSTD_lazy    },  /* level  7 */

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    { 18, 18, 19,  4,  4,  8, ZSTD_lazy2   },  /* level  8 */

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    { 18, 18, 19,  5,  4,  8, ZSTD_lazy2   },  /* level  9 */

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    { 18, 18, 19,  6,  4,  8, ZSTD_lazy2   },  /* level 10 */

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    { 18, 18, 19,  5,  4, 12, ZSTD_btlazy2 },  /* level 11.*/

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    { 18, 19, 19,  7,  4, 12, ZSTD_btlazy2 },  /* level 12.*/

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    { 18, 18, 19,  4,  4, 16, ZSTD_btopt   },  /* level 13 */

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    { 18, 18, 19,  4,  3, 32, ZSTD_btopt   },  /* level 14.*/

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    { 18, 18, 19,  6,  3,128, ZSTD_btopt   },  /* level 15.*/

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    { 18, 19, 19,  6,  3,128, ZSTD_btultra },  /* level 16.*/

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    { 18, 19, 19,  8,  3,256, ZSTD_btultra },  /* level 17.*/

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    { 18, 19, 19,  6,  3,128, ZSTD_btultra2},  /* level 18.*/

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    { 18, 19, 19,  8,  3,256, ZSTD_btultra2},  /* level 19.*/

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    { 18, 19, 19, 10,  3,512, ZSTD_btultra2},  /* level 20.*/

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    { 18, 19, 19, 12,  3,512, ZSTD_btultra2},  /* level 21.*/

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    { 18, 19, 19, 13,  3,999, ZSTD_btultra2},  /* level 22.*/

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},

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{   /* for srcSize <= 128 KB */

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    /* W,  C,  H,  S,  L,  T, strat */

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    { 17, 12, 12,  1,  5,  1, ZSTD_fast    },  /* base for negative levels */

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    { 17, 12, 13,  1,  6,  0, ZSTD_fast    },  /* level  1 */

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    { 17, 13, 15,  1,  5,  0, ZSTD_fast    },  /* level  2 */

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    { 17, 15, 16,  2,  5,  0, ZSTD_dfast   },  /* level  3 */

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    { 17, 17, 17,  2,  4,  0, ZSTD_dfast   },  /* level  4 */

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    { 17, 16, 17,  3,  4,  2, ZSTD_greedy  },  /* level  5 */

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    { 17, 16, 17,  3,  4,  4, ZSTD_lazy    },  /* level  6 */

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    { 17, 16, 17,  3,  4,  8, ZSTD_lazy2   },  /* level  7 */

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    { 17, 16, 17,  4,  4,  8, ZSTD_lazy2   },  /* level  8 */

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    { 17, 16, 17,  5,  4,  8, ZSTD_lazy2   },  /* level  9 */

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    { 17, 16, 17,  6,  4,  8, ZSTD_lazy2   },  /* level 10 */

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    { 17, 17, 17,  5,  4,  8, ZSTD_btlazy2 },  /* level 11 */

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    { 17, 18, 17,  7,  4, 12, ZSTD_btlazy2 },  /* level 12 */

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    { 17, 18, 17,  3,  4, 12, ZSTD_btopt   },  /* level 13.*/

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    { 17, 18, 17,  4,  3, 32, ZSTD_btopt   },  /* level 14.*/

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    { 17, 18, 17,  6,  3,256, ZSTD_btopt   },  /* level 15.*/

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    { 17, 18, 17,  6,  3,128, ZSTD_btultra },  /* level 16.*/

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    { 17, 18, 17,  8,  3,256, ZSTD_btultra },  /* level 17.*/

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    { 17, 18, 17, 10,  3,512, ZSTD_btultra },  /* level 18.*/

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    { 17, 18, 17,  5,  3,256, ZSTD_btultra2},  /* level 19.*/

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    { 17, 18, 17,  7,  3,512, ZSTD_btultra2},  /* level 20.*/

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    { 17, 18, 17,  9,  3,512, ZSTD_btultra2},  /* level 21.*/

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    { 17, 18, 17, 11,  3,999, ZSTD_btultra2},  /* level 22.*/

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},

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{   /* for srcSize <= 16 KB */

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    /* W,  C,  H,  S,  L,  T, strat */

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    { 14, 12, 13,  1,  5,  1, ZSTD_fast    },  /* base for negative levels */

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    { 14, 14, 15,  1,  5,  0, ZSTD_fast    },  /* level  1 */

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    { 14, 14, 15,  1,  4,  0, ZSTD_fast    },  /* level  2 */

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    { 14, 14, 15,  2,  4,  0, ZSTD_dfast   },  /* level  3 */

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    { 14, 14, 14,  4,  4,  2, ZSTD_greedy  },  /* level  4 */

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    { 14, 14, 14,  3,  4,  4, ZSTD_lazy    },  /* level  5.*/

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    { 14, 14, 14,  4,  4,  8, ZSTD_lazy2   },  /* level  6 */

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    { 14, 14, 14,  6,  4,  8, ZSTD_lazy2   },  /* level  7 */

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    { 14, 14, 14,  8,  4,  8, ZSTD_lazy2   },  /* level  8.*/

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    { 14, 15, 14,  5,  4,  8, ZSTD_btlazy2 },  /* level  9.*/

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    { 14, 15, 14,  9,  4,  8, ZSTD_btlazy2 },  /* level 10.*/

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    { 14, 15, 14,  3,  4, 12, ZSTD_btopt   },  /* level 11.*/

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    { 14, 15, 14,  4,  3, 24, ZSTD_btopt   },  /* level 12.*/

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    { 14, 15, 14,  5,  3, 32, ZSTD_btultra },  /* level 13.*/

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    { 14, 15, 15,  6,  3, 64, ZSTD_btultra },  /* level 14.*/

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    { 14, 15, 15,  7,  3,256, ZSTD_btultra },  /* level 15.*/

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    { 14, 15, 15,  5,  3, 48, ZSTD_btultra2},  /* level 16.*/

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    { 14, 15, 15,  6,  3,128, ZSTD_btultra2},  /* level 17.*/

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    { 14, 15, 15,  7,  3,256, ZSTD_btultra2},  /* level 18.*/

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    { 14, 15, 15,  8,  3,256, ZSTD_btultra2},  /* level 19.*/

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    { 14, 15, 15,  8,  3,512, ZSTD_btultra2},  /* level 20.*/

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    { 14, 15, 15,  9,  3,512, ZSTD_btultra2},  /* level 21.*/

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    { 14, 15, 15, 10,  3,999, ZSTD_btultra2},  /* level 22.*/

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},

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};

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#endif  /* ZSTD_CLEVELS_H */

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