| 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_COMPRESS_SEQUENCES_H |
| 12 | #define ZSTD_COMPRESS_SEQUENCES_H |
| 13 | |
| 14 | #include "../common/fse.h" /* FSE_repeat, FSE_CTable */ |
| 15 | #include "../common/zstd_internal.h" /* symbolEncodingType_e, ZSTD_strategy */ |
| 16 | |
| 17 | typedef enum { |
| 18 | ZSTD_defaultDisallowed = 0, |
| 19 | ZSTD_defaultAllowed = 1 |
| 20 | } ZSTD_defaultPolicy_e; |
| 21 | |
| 22 | symbolEncodingType_e |
| 23 | ZSTD_selectEncodingType( |
| 24 | FSE_repeat* repeatMode, unsigned const* count, unsigned const max, |
| 25 | size_t const mostFrequent, size_t nbSeq, unsigned const FSELog, |
| 26 | FSE_CTable const* prevCTable, |
| 27 | short const* defaultNorm, U32 defaultNormLog, |
| 28 | ZSTD_defaultPolicy_e const isDefaultAllowed, |
| 29 | ZSTD_strategy const strategy); |
| 30 | |
| 31 | size_t |
| 32 | ZSTD_buildCTable(void* dst, size_t dstCapacity, |
| 33 | FSE_CTable* nextCTable, U32 FSELog, symbolEncodingType_e type, |
| 34 | unsigned* count, U32 max, |
| 35 | const BYTE* codeTable, size_t nbSeq, |
| 36 | const S16* defaultNorm, U32 defaultNormLog, U32 defaultMax, |
| 37 | const FSE_CTable* prevCTable, size_t prevCTableSize, |
| 38 | void* entropyWorkspace, size_t entropyWorkspaceSize); |
| 39 | |
| 40 | size_t ZSTD_encodeSequences( |
| 41 | void* dst, size_t dstCapacity, |
| 42 | FSE_CTable const* CTable_MatchLength, BYTE const* mlCodeTable, |
| 43 | FSE_CTable const* CTable_OffsetBits, BYTE const* ofCodeTable, |
| 44 | FSE_CTable const* CTable_LitLength, BYTE const* llCodeTable, |
| 45 | seqDef const* sequences, size_t nbSeq, int longOffsets, int bmi2); |
| 46 | |
| 47 | size_t ZSTD_fseBitCost( |
| 48 | FSE_CTable const* ctable, |
| 49 | unsigned const* count, |
| 50 | unsigned const max); |
| 51 | |
| 52 | size_t ZSTD_crossEntropyCost(short const* norm, unsigned accuracyLog, |
| 53 | unsigned const* count, unsigned const max); |
| 54 | #endif /* ZSTD_COMPRESS_SEQUENCES_H */ |