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78 lines
3 KiB
C
78 lines
3 KiB
C
/* LzmaEnc.h -- LZMA Encoder
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2013-01-18 : Igor Pavlov : Public domain */
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#ifndef __LZMA_ENC_H
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#define __LZMA_ENC_H
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#include "7zTypes.h"
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EXTERN_C_BEGIN
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#define LZMA_PROPS_SIZE 5
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typedef struct _CLzmaEncProps
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{
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int level; /* 0 <= level <= 9 */
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UInt32 dictSize; /* (1 << 12) <= dictSize <= (1 << 27) for 32-bit version
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(1 << 12) <= dictSize <= (1 << 30) for 64-bit version
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default = (1 << 24) */
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UInt64 reduceSize; /* estimated size of data that will be compressed. default = 0xFFFFFFFF.
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Encoder uses this value to reduce dictionary size */
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int lc; /* 0 <= lc <= 8, default = 3 */
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int lp; /* 0 <= lp <= 4, default = 0 */
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int pb; /* 0 <= pb <= 4, default = 2 */
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int algo; /* 0 - fast, 1 - normal, default = 1 */
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int fb; /* 5 <= fb <= 273, default = 32 */
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int btMode; /* 0 - hashChain Mode, 1 - binTree mode - normal, default = 1 */
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int numHashBytes; /* 2, 3 or 4, default = 4 */
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UInt32 mc; /* 1 <= mc <= (1 << 30), default = 32 */
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unsigned writeEndMark; /* 0 - do not write EOPM, 1 - write EOPM, default = 0 */
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int numThreads; /* 1 or 2, default = 2 */
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} CLzmaEncProps;
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void LzmaEncProps_Init(CLzmaEncProps *p);
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void LzmaEncProps_Normalize(CLzmaEncProps *p);
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UInt32 LzmaEncProps_GetDictSize(const CLzmaEncProps *props2);
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/* ---------- CLzmaEncHandle Interface ---------- */
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/* LzmaEnc_* functions can return the following exit codes:
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Returns:
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SZ_OK - OK
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SZ_ERROR_MEM - Memory allocation error
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SZ_ERROR_PARAM - Incorrect paramater in props
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SZ_ERROR_WRITE - Write callback error.
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SZ_ERROR_PROGRESS - some break from progress callback
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SZ_ERROR_THREAD - errors in multithreading functions (only for Mt version)
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*/
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typedef void * CLzmaEncHandle;
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CLzmaEncHandle LzmaEnc_Create(ISzAlloc *alloc);
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void LzmaEnc_Destroy(CLzmaEncHandle p, ISzAlloc *alloc, ISzAlloc *allocBig);
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SRes LzmaEnc_SetProps(CLzmaEncHandle p, const CLzmaEncProps *props);
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SRes LzmaEnc_WriteProperties(CLzmaEncHandle p, Byte *properties, SizeT *size);
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SRes LzmaEnc_Encode(CLzmaEncHandle p, ISeqOutStream *outStream, ISeqInStream *inStream,
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ICompressProgress *progress, ISzAlloc *alloc, ISzAlloc *allocBig);
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SRes LzmaEnc_MemEncode(CLzmaEncHandle p, Byte *dest, SizeT *destLen, const Byte *src, SizeT srcLen,
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int writeEndMark, ICompressProgress *progress, ISzAlloc *alloc, ISzAlloc *allocBig);
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/* ---------- One Call Interface ---------- */
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/* LzmaEncode
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Return code:
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SZ_OK - OK
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SZ_ERROR_MEM - Memory allocation error
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SZ_ERROR_PARAM - Incorrect paramater
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SZ_ERROR_OUTPUT_EOF - output buffer overflow
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SZ_ERROR_THREAD - errors in multithreading functions (only for Mt version)
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*/
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SRes LzmaEncode(Byte *dest, SizeT *destLen, const Byte *src, SizeT srcLen,
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const CLzmaEncProps *props, Byte *propsEncoded, SizeT *propsSize, int writeEndMark,
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ICompressProgress *progress, ISzAlloc *alloc, ISzAlloc *allocBig);
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EXTERN_C_END
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#endif
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