1 /* LzmaEnc.h -- LZMA Encoder
2 2023-04-13 : Igor Pavlov : Public domain */
4 #ifndef ZIP7_INC_LZMA_ENC_H
5 #define ZIP7_INC_LZMA_ENC_H
11 #define LZMA_PROPS_SIZE 5
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 unsigned numHashOutBits; /* default = ? */
27 UInt32 mc; /* 1 <= mc <= (1 << 30), default = 32 */
28 unsigned writeEndMark; /* 0 - do not write EOPM, 1 - write EOPM, default = 0 */
29 int numThreads; /* 1 or 2, default = 2 */
33 UInt64 reduceSize; /* estimated size of data that will be compressed. default = (UInt64)(Int64)-1.
34 Encoder uses this value to reduce dictionary size */
39 void LzmaEncProps_Init(CLzmaEncProps *p);
40 void LzmaEncProps_Normalize(CLzmaEncProps *p);
41 UInt32 LzmaEncProps_GetDictSize(const CLzmaEncProps *props2);
44 /* ---------- CLzmaEncHandle Interface ---------- */
46 /* LzmaEnc* functions can return the following exit codes:
49 SZ_ERROR_MEM - Memory allocation error
50 SZ_ERROR_PARAM - Incorrect paramater in props
51 SZ_ERROR_WRITE - ISeqOutStream write callback error
52 SZ_ERROR_OUTPUT_EOF - output buffer overflow - version with (Byte *) output
53 SZ_ERROR_PROGRESS - some break from progress callback
54 SZ_ERROR_THREAD - error in multithreading functions (only for Mt version)
57 typedef struct CLzmaEnc CLzmaEnc;
58 typedef CLzmaEnc * CLzmaEncHandle;
59 // Z7_DECLARE_HANDLE(CLzmaEncHandle)
61 CLzmaEncHandle LzmaEnc_Create(ISzAllocPtr alloc);
62 void LzmaEnc_Destroy(CLzmaEncHandle p, ISzAllocPtr alloc, ISzAllocPtr allocBig);
64 SRes LzmaEnc_SetProps(CLzmaEncHandle p, const CLzmaEncProps *props);
65 void LzmaEnc_SetDataSize(CLzmaEncHandle p, UInt64 expectedDataSiize);
66 SRes LzmaEnc_WriteProperties(CLzmaEncHandle p, Byte *properties, SizeT *size);
67 unsigned LzmaEnc_IsWriteEndMark(CLzmaEncHandle p);
69 SRes LzmaEnc_Encode(CLzmaEncHandle p, ISeqOutStreamPtr outStream, ISeqInStreamPtr inStream,
70 ICompressProgressPtr progress, ISzAllocPtr alloc, ISzAllocPtr allocBig);
71 SRes LzmaEnc_MemEncode(CLzmaEncHandle p, Byte *dest, SizeT *destLen, const Byte *src, SizeT srcLen,
72 int writeEndMark, ICompressProgressPtr progress, ISzAllocPtr alloc, ISzAllocPtr allocBig);
75 /* ---------- One Call Interface ---------- */
77 SRes LzmaEncode(Byte *dest, SizeT *destLen, const Byte *src, SizeT srcLen,
78 const CLzmaEncProps *props, Byte *propsEncoded, SizeT *propsSize, int writeEndMark,
79 ICompressProgressPtr progress, ISzAllocPtr alloc, ISzAllocPtr allocBig);