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101 lines
3.2 KiB
C
101 lines
3.2 KiB
C
/*
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* Copyright (c) 2018, Conor McCarthy
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* All rights reserved.
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* Parts based on zstd_compress_internal.h copyright Yann Collet
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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 FL2_COMPRESS_H
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#define FL2_COMPRESS_H
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/*-*************************************
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* Dependencies
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***************************************/
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#include "mem.h"
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#include "data_block.h"
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#include "radix_internal.h"
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#include "lzma2_enc.h"
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#include "fast-lzma2.h"
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#include "fl2threading.h"
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#include "fl2pool.h"
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#ifndef NO_XXHASH
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# include "xxhash.h"
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#endif
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#if defined (__cplusplus)
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extern "C" {
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#endif
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typedef struct {
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unsigned dictionaryLog; /* largest match distance : larger == more compression, more memory needed during decompression; >= 27 == more memory, slower */
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unsigned overlapFraction; /* overlap between consecutive blocks in 1/16 units: larger == more compression, slower */
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unsigned chainLog; /* fully searched segment : larger == more compression, slower, more memory; hybrid mode only (ultra) */
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unsigned searchLog; /* nb of searches : larger == more compression, slower; hybrid mode only (ultra) */
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unsigned searchDepth; /* maximum depth for resolving string matches : larger == more compression, slower; >= 64 == more memory, slower */
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unsigned fastLength; /* acceptable match size for parser, not less than searchDepth : larger == more compression, slower; fast bytes parameter from 7-zip */
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unsigned divideAndConquer; /* split long chains of 2-byte matches into shorter chains with a small overlap : faster, somewhat less compression; enabled by default */
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unsigned bufferLog; /* buffer size for processing match chains is (dictionaryLog - bufferLog) : when divideAndConquer enabled, affects compression; */
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/* when divideAndConquer disabled, affects speed in a hardware-dependent manner */
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FL2_strategy strategy; /* encoder strategy : fast, optimized or ultra (hybrid) */
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} FL2_compressionParameters;
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/*-*************************************
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* Context memory management
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***************************************/
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typedef struct {
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FL2_lzma2Parameters cParams;
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RMF_parameters rParams;
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unsigned compressionLevel;
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BYTE highCompression;
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#ifndef NO_XXHASH
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BYTE doXXH;
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#endif
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BYTE omitProp;
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} FL2_CCtx_params;
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typedef struct {
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FL2_CCtx* cctx;
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FL2_lzmaEncoderCtx* enc;
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FL2_dataBlock block;
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size_t cSize;
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} FL2_job;
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struct FL2_CCtx_s {
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FL2_CCtx_params params;
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#ifndef FL2_SINGLETHREAD
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FL2POOL_ctx* factory;
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#endif
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FL2_dataBlock curBlock;
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size_t dictMax;
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U64 block_total;
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FL2_matchTable* matchTable;
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unsigned jobCount;
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FL2_job jobs[1];
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};
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struct FL2_CStream_s {
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FL2_CCtx* cctx;
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FL2_blockBuffer inBuff;
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#ifndef NO_XXHASH
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XXH32_state_t *xxh;
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#endif
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size_t thread_count;
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size_t out_thread;
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size_t out_pos;
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size_t hash_pos;
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BYTE end_marked;
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BYTE wrote_prop;
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};
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#if defined (__cplusplus)
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}
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#endif
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#endif /* FL2_COMPRESS_H */
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