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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 |