misc/libphysfs/lzma/CPP/7zip/Compress/LZMA_Alone/LzmaRam.h
author Wuzzy <Wuzzy2@mail.ru>
Tue, 24 Oct 2017 19:30:55 +0200
changeset 12751 838515c4e6c5
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Rewrite INSTALL file: Markdown format, add troubleshooting section, more detailed build instructions, etc.
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// LzmaRam.h
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#ifndef __LzmaRam_h
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#define __LzmaRam_h
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#include <stdlib.h>
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#include "../../../Common/Types.h"
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/*
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LzmaRamEncode: BCJ + LZMA RAM->RAM compressing.
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It uses .lzma format, but it writes one additional byte to .lzma file:
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  0: - no filter
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  1: - x86(BCJ) filter.
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To provide best compression ratio dictionarySize mustbe >= inSize
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LzmaRamEncode allocates Data with MyAlloc/BigAlloc functions.
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RAM Requirements:
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  RamSize = dictionarySize * 9.5 + 6MB + FilterBlockSize 
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    FilterBlockSize = 0, if useFilter == false
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    FilterBlockSize = inSize, if useFilter == true
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  Return code:
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    0 - OK
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    1 - Unspecified Error
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    2 - Memory allocating error
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    3 - Output buffer OVERFLOW
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If you use SZ_FILTER_AUTO mode, then encoder will use 2 or 3 passes:
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  2 passes when FILTER_NO provides better compression.
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  3 passes when FILTER_YES provides better compression.
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*/
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enum ESzFilterMode 
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{
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  SZ_FILTER_NO,
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  SZ_FILTER_YES,
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  SZ_FILTER_AUTO
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};
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int LzmaRamEncode(
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    const Byte *inBuffer, size_t inSize, 
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    Byte *outBuffer, size_t outSize, size_t *outSizeProcessed, 
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    UInt32 dictionarySize, ESzFilterMode filterMode);
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#endif