nel/3rdparty/seven_zip/LzmaEnc.h

   1 /*  LzmaEnc.h -- LZMA Encoder
   2 2017-07-27 : Igor Pavlov : Public domain */
   3
   4 #ifndef __LZMA_ENC_H
   5 #define __LZMA_ENC_H
   6
   7 #include "7zTypes.h"
   8
   9 EXTERN_C_BEGIN
  10
  11 #define LZMA_PROPS_SIZE 5
  12
  13 typedef struct _CLzmaEncProps
  14 {
  15   int level;       /* 0 <= level <= 9 */
  16   UInt32 dictSize; /* (1 << 12) <= dictSize <= (1 << 27) for 32-bit version
  17                       (1 << 12) <= dictSize <= (3 << 29) for 64-bit version
  18                       default = (1 << 24) */
  19   int lc;          /* 0 <= lc <= 8, default = 3 */
  20   int lp;          /* 0 <= lp <= 4, default = 0 */
  21   int pb;          /* 0 <= pb <= 4, default = 2 */
  22   int algo;        /* 0 - fast, 1 - normal, default = 1 */
  23   int fb;          /* 5 <= fb <= 273, default = 32 */
  24   int btMode;      /* 0 - hashChain Mode, 1 - binTree mode - normal, default = 1 */
  25   int numHashBytes; /* 2, 3 or 4, default = 4 */
  26   UInt32 mc;       /* 1 <= mc <= (1 << 30), default = 32 */
  27   unsigned writeEndMark;  /* 0 - do not write EOPM, 1 - write EOPM, default = 0 */
  28   int numThreads;  /* 1 or 2, default = 2 */
  29
  30   UInt64 reduceSize; /* estimated size of data that will be compressed. default = (UInt64)(Int64)-1.
  31                         Encoder uses this value to reduce dictionary size */
  32 } CLzmaEncProps;
  33
  34 void LzmaEncProps_Init(CLzmaEncProps *p);
  35 void LzmaEncProps_Normalize(CLzmaEncProps *p);
  36 UInt32 LzmaEncProps_GetDictSize(const CLzmaEncProps *props2);
  37
  38
  39 /* ---------- CLzmaEncHandle Interface ---------- */
  40
  41 /* LzmaEnc* functions can return the following exit codes:
  42 SRes:
  43   SZ_OK           - OK
  44   SZ_ERROR_MEM    - Memory allocation error
  45   SZ_ERROR_PARAM  - Incorrect paramater in props
  46   SZ_ERROR_WRITE  - ISeqOutStream write callback error
  47   SZ_ERROR_OUTPUT_EOF - output buffer overflow - version with (Byte *) output
  48   SZ_ERROR_PROGRESS - some break from progress callback
  49   SZ_ERROR_THREAD - error in multithreading functions (only for Mt version)
  50 */
  51
  52 typedef void * CLzmaEncHandle;
  53
  54 CLzmaEncHandle LzmaEnc_Create(ISzAllocPtr alloc);
  55 void LzmaEnc_Destroy(CLzmaEncHandle p, ISzAllocPtr alloc, ISzAllocPtr allocBig);
  56
  57 SRes LzmaEnc_SetProps(CLzmaEncHandle p, const CLzmaEncProps *props);
  58 void LzmaEnc_SetDataSize(CLzmaEncHandle p, UInt64 expectedDataSiize);
  59 SRes LzmaEnc_WriteProperties(CLzmaEncHandle p, Byte *properties, SizeT *size);
  60 unsigned LzmaEnc_IsWriteEndMark(CLzmaEncHandle p);
  61
  62 SRes LzmaEnc_Encode(CLzmaEncHandle p, ISeqOutStream *outStream, ISeqInStream *inStream,
  63     ICompressProgress *progress, ISzAllocPtr alloc, ISzAllocPtr allocBig);
  64 SRes LzmaEnc_MemEncode(CLzmaEncHandle p, Byte *dest, SizeT *destLen, const Byte *src, SizeT srcLen,
  65     int writeEndMark, ICompressProgress *progress, ISzAllocPtr alloc, ISzAllocPtr allocBig);
  66
  67
  68 /* ---------- One Call Interface ---------- */
  69
  70 SRes LzmaEncode(Byte *dest, SizeT *destLen, const Byte *src, SizeT srcLen,
  71     const CLzmaEncProps *props, Byte *propsEncoded, SizeT *propsSize, int writeEndMark,
  72     ICompressProgress *progress, ISzAllocPtr alloc, ISzAllocPtr allocBig);
  73
  74 EXTERN_C_END
  75
  76 #endif