1 /* LzmaEnc.h -- LZMA Encoder 2 2019-10-30 : 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 33 UInt64 affinity; 34 } CLzmaEncProps; 35 36 void LzmaEncProps_Init(CLzmaEncProps *p); 37 void LzmaEncProps_Normalize(CLzmaEncProps *p); 38 UInt32 LzmaEncProps_GetDictSize(const CLzmaEncProps *props2); 39 40 41 /* ---------- CLzmaEncHandle Interface ---------- */ 42 43 /* LzmaEnc* functions can return the following exit codes: 44 SRes: 45 SZ_OK - OK 46 SZ_ERROR_MEM - Memory allocation error 47 SZ_ERROR_PARAM - Incorrect paramater in props 48 SZ_ERROR_WRITE - ISeqOutStream write callback error 49 SZ_ERROR_OUTPUT_EOF - output buffer overflow - version with (Byte *) output 50 SZ_ERROR_PROGRESS - some break from progress callback 51 SZ_ERROR_THREAD - error in multithreading functions (only for Mt version) 52 */ 53 54 typedef void * CLzmaEncHandle; 55 56 CLzmaEncHandle LzmaEnc_Create(ISzAllocPtr alloc); 57 void LzmaEnc_Destroy(CLzmaEncHandle p, ISzAllocPtr alloc, ISzAllocPtr allocBig); 58 59 SRes LzmaEnc_SetProps(CLzmaEncHandle p, const CLzmaEncProps *props); 60 void LzmaEnc_SetDataSize(CLzmaEncHandle p, UInt64 expectedDataSiize); 61 SRes LzmaEnc_WriteProperties(CLzmaEncHandle p, Byte *properties, SizeT *size); 62 unsigned LzmaEnc_IsWriteEndMark(CLzmaEncHandle p); 63 64 SRes LzmaEnc_Encode(CLzmaEncHandle p, ISeqOutStream *outStream, ISeqInStream *inStream, 65 ICompressProgress *progress, ISzAllocPtr alloc, ISzAllocPtr allocBig); 66 SRes LzmaEnc_MemEncode(CLzmaEncHandle p, Byte *dest, SizeT *destLen, const Byte *src, SizeT srcLen, 67 int writeEndMark, ICompressProgress *progress, ISzAllocPtr alloc, ISzAllocPtr allocBig); 68 69 70 /* ---------- One Call Interface ---------- */ 71 72 SRes LzmaEncode(Byte *dest, SizeT *destLen, const Byte *src, SizeT srcLen, 73 const CLzmaEncProps *props, Byte *propsEncoded, SizeT *propsSize, int writeEndMark, 74 ICompressProgress *progress, ISzAllocPtr alloc, ISzAllocPtr allocBig); 75 76 EXTERN_C_END 77 78 #endif 79