1 // SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-only 2 /* 3 * Copyright (c) 2016-2020, Yann Collet, Facebook, Inc. 4 * All rights reserved. 5 * 6 * This source code is licensed under both the BSD-style license (found in the 7 * LICENSE file in the root directory of this source tree) and the GPLv2 (found 8 * in the COPYING file in the root directory of this source tree). 9 * You may select, at your option, one of the above-listed licenses. 10 */ 11 12 #ifndef ZSTD_COMPRESS_SEQUENCES_H 13 #define ZSTD_COMPRESS_SEQUENCES_H 14 15 #include "../common/fse.h" /* FSE_repeat, FSE_CTable */ 16 #include "../common/zstd_internal.h" /* symbolEncodingType_e, ZSTD_strategy */ 17 18 typedef enum { 19 ZSTD_defaultDisallowed = 0, 20 ZSTD_defaultAllowed = 1 21 } ZSTD_defaultPolicy_e; 22 23 symbolEncodingType_e 24 ZSTD_selectEncodingType( 25 FSE_repeat* repeatMode, unsigned const* count, unsigned const max, 26 size_t const mostFrequent, size_t nbSeq, unsigned const FSELog, 27 FSE_CTable const* prevCTable, 28 short const* defaultNorm, U32 defaultNormLog, 29 ZSTD_defaultPolicy_e const isDefaultAllowed, 30 ZSTD_strategy const strategy); 31 32 size_t 33 ZSTD_buildCTable(void* dst, size_t dstCapacity, 34 FSE_CTable* nextCTable, U32 FSELog, symbolEncodingType_e type, 35 unsigned* count, U32 max, 36 const BYTE* codeTable, size_t nbSeq, 37 const S16* defaultNorm, U32 defaultNormLog, U32 defaultMax, 38 const FSE_CTable* prevCTable, size_t prevCTableSize, 39 void* entropyWorkspace, size_t entropyWorkspaceSize); 40 41 size_t ZSTD_encodeSequences( 42 void* dst, size_t dstCapacity, 43 FSE_CTable const* CTable_MatchLength, BYTE const* mlCodeTable, 44 FSE_CTable const* CTable_OffsetBits, BYTE const* ofCodeTable, 45 FSE_CTable const* CTable_LitLength, BYTE const* llCodeTable, 46 seqDef const* sequences, size_t nbSeq, int longOffsets, int bmi2); 47 48 size_t ZSTD_fseBitCost( 49 FSE_CTable const* ctable, 50 unsigned const* count, 51 unsigned const max); 52 53 size_t ZSTD_crossEntropyCost(short const* norm, unsigned accuracyLog, 54 unsigned const* count, unsigned const max); 55 #endif /* ZSTD_COMPRESS_SEQUENCES_H */ 56