| 1 | /* |
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| 2 | * Copyright (c) Yann Collet, Facebook, Inc. |
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| 3 | * All rights reserved. |
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| 4 | * |
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| 5 | * This source code is licensed under both the BSD-style license (found in the |
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| 6 | * LICENSE file in the root directory of this source tree) and the GPLv2 (found |
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| 7 | * in the COPYING file in the root directory of this source tree). |
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| 8 | * You may select, at your option, one of the above-listed licenses. |
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| 9 | */ |
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| 10 | |
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| 11 | #ifndef ZSTD_COMPRESS_SEQUENCES_H |
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| 12 | #define ZSTD_COMPRESS_SEQUENCES_H |
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| 13 | |
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| 14 | #include "../common/fse.h" /* FSE_repeat, FSE_CTable */ |
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| 15 | #include "../common/zstd_internal.h" /* symbolEncodingType_e, ZSTD_strategy */ |
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| 16 | |
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| 17 | typedef enum { |
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| 18 | ZSTD_defaultDisallowed = 0, |
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| 19 | ZSTD_defaultAllowed = 1 |
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| 20 | } ZSTD_defaultPolicy_e; |
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| 21 | |
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| 22 | symbolEncodingType_e |
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| 23 | ZSTD_selectEncodingType( |
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| 24 | FSE_repeat* repeatMode, unsigned const* count, unsigned const max, |
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| 25 | size_t const mostFrequent, size_t nbSeq, unsigned const FSELog, |
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| 26 | FSE_CTable const* prevCTable, |
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| 27 | short const* defaultNorm, U32 defaultNormLog, |
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| 28 | ZSTD_defaultPolicy_e const isDefaultAllowed, |
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| 29 | ZSTD_strategy const strategy); |
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| 30 | |
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| 31 | size_t |
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| 32 | ZSTD_buildCTable(void* dst, size_t dstCapacity, |
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| 33 | FSE_CTable* nextCTable, U32 FSELog, symbolEncodingType_e type, |
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| 34 | unsigned* count, U32 max, |
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| 35 | const BYTE* codeTable, size_t nbSeq, |
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| 36 | const S16* defaultNorm, U32 defaultNormLog, U32 defaultMax, |
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| 37 | const FSE_CTable* prevCTable, size_t prevCTableSize, |
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| 38 | void* entropyWorkspace, size_t entropyWorkspaceSize); |
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| 39 | |
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| 40 | size_t ZSTD_encodeSequences( |
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| 41 | void* dst, size_t dstCapacity, |
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| 42 | FSE_CTable const* CTable_MatchLength, BYTE const* mlCodeTable, |
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| 43 | FSE_CTable const* CTable_OffsetBits, BYTE const* ofCodeTable, |
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| 44 | FSE_CTable const* CTable_LitLength, BYTE const* llCodeTable, |
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| 45 | seqDef const* sequences, size_t nbSeq, int longOffsets, int bmi2); |
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| 46 | |
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| 47 | size_t ZSTD_fseBitCost( |
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| 48 | FSE_CTable const* ctable, |
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| 49 | unsigned const* count, |
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| 50 | unsigned const max); |
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| 51 | |
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| 52 | size_t ZSTD_crossEntropyCost(short const* norm, unsigned accuracyLog, |
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| 53 | unsigned const* count, unsigned const max); |
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| 54 | #endif /* ZSTD_COMPRESS_SEQUENCES_H */ |
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| 55 | |
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