47 lines
1.1 KiB
C
47 lines
1.1 KiB
C
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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
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