1 /* LzmaEnc.h -- LZMA Encoder
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2 2019-10-30 : Igor Pavlov : Public domain */
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11 #define LZMA_PROPS_SIZE 5
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13 typedef struct _CLzmaEncProps
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15 int level; /* 0 <= level <= 9 */
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16 UInt32 dictSize; /* (1 << 12) <= dictSize <= (1 << 27) for 32-bit version
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17 (1 << 12) <= dictSize <= (3 << 29) for 64-bit version
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18 default = (1 << 24) */
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19 int lc; /* 0 <= lc <= 8, default = 3 */
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20 int lp; /* 0 <= lp <= 4, default = 0 */
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21 int pb; /* 0 <= pb <= 4, default = 2 */
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22 int algo; /* 0 - fast, 1 - normal, default = 1 */
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23 int fb; /* 5 <= fb <= 273, default = 32 */
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24 int btMode; /* 0 - hashChain Mode, 1 - binTree mode - normal, default = 1 */
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25 int numHashBytes; /* 2, 3 or 4, default = 4 */
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26 UInt32 mc; /* 1 <= mc <= (1 << 30), default = 32 */
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27 unsigned writeEndMark; /* 0 - do not write EOPM, 1 - write EOPM, default = 0 */
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28 int numThreads; /* 1 or 2, default = 2 */
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30 UInt64 reduceSize; /* estimated size of data that will be compressed. default = (UInt64)(Int64)-1.
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31 Encoder uses this value to reduce dictionary size */
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36 void LzmaEncProps_Init(CLzmaEncProps *p);
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37 void LzmaEncProps_Normalize(CLzmaEncProps *p);
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38 UInt32 LzmaEncProps_GetDictSize(const CLzmaEncProps *props2);
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41 /* ---------- CLzmaEncHandle Interface ---------- */
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43 /* LzmaEnc* functions can return the following exit codes:
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46 SZ_ERROR_MEM - Memory allocation error
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47 SZ_ERROR_PARAM - Incorrect paramater in props
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48 SZ_ERROR_WRITE - ISeqOutStream write callback error
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49 SZ_ERROR_OUTPUT_EOF - output buffer overflow - version with (Byte *) output
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50 SZ_ERROR_PROGRESS - some break from progress callback
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51 SZ_ERROR_THREAD - error in multithreading functions (only for Mt version)
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54 typedef void * CLzmaEncHandle;
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56 CLzmaEncHandle LzmaEnc_Create(ISzAllocPtr alloc);
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57 void LzmaEnc_Destroy(CLzmaEncHandle p, ISzAllocPtr alloc, ISzAllocPtr allocBig);
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59 SRes LzmaEnc_SetProps(CLzmaEncHandle p, const CLzmaEncProps *props);
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60 void LzmaEnc_SetDataSize(CLzmaEncHandle p, UInt64 expectedDataSiize);
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61 SRes LzmaEnc_WriteProperties(CLzmaEncHandle p, Byte *properties, SizeT *size);
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62 unsigned LzmaEnc_IsWriteEndMark(CLzmaEncHandle p);
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64 SRes LzmaEnc_Encode(CLzmaEncHandle p, ISeqOutStream *outStream, ISeqInStream *inStream,
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65 ICompressProgress *progress, ISzAllocPtr alloc, ISzAllocPtr allocBig);
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66 SRes LzmaEnc_MemEncode(CLzmaEncHandle p, Byte *dest, SizeT *destLen, const Byte *src, SizeT srcLen,
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67 int writeEndMark, ICompressProgress *progress, ISzAllocPtr alloc, ISzAllocPtr allocBig);
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70 /* ---------- One Call Interface ---------- */
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72 SRes LzmaEncode(Byte *dest, SizeT *destLen, const Byte *src, SizeT srcLen,
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73 const CLzmaEncProps *props, Byte *propsEncoded, SizeT *propsSize, int writeEndMark,
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74 ICompressProgress *progress, ISzAllocPtr alloc, ISzAllocPtr allocBig);
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