[pcsx_rearmed.git] / deps / libchdr / deps / lzma-19.00 / include / LzmaLib.h

/* LzmaLib.h -- LZMA library interface
2013-01-18 : Igor Pavlov : Public domain */

#ifndef __LZMA_LIB_H
#define __LZMA_LIB_H

#include "7zTypes.h"

EXTERN_C_BEGIN

#define MY_STDAPI int MY_STD_CALL

#define LZMA_PROPS_SIZE 5

/*
RAM requirements for LZMA:
  for compression:   (dictSize * 11.5 + 6 MB) + state_size
  for decompression: dictSize + state_size
    state_size = (4 + (1.5 << (lc + lp))) KB
    by default (lc=3, lp=0), state_size = 16 KB.

LZMA properties (5 bytes) format
    Offset Size  Description
      0     1    lc, lp and pb in encoded form.
      1     4    dictSize (little endian).
*/

/*
LzmaCompress
------------

outPropsSize -
     In:  the pointer to the size of outProps buffer; *outPropsSize = LZMA_PROPS_SIZE = 5.
     Out: the pointer to the size of written properties in outProps buffer; *outPropsSize = LZMA_PROPS_SIZE = 5.

  LZMA Encoder will use defult values for any parameter, if it is
  -1  for any from: level, loc, lp, pb, fb, numThreads
   0  for dictSize
  
level - compression level: 0 <= level <= 9;

  level dictSize algo  fb
    0:    16 KB   0    32
    1:    64 KB   0    32
    2:   256 KB   0    32
    3:     1 MB   0    32
    4:     4 MB   0    32
    5:    16 MB   1    32
    6:    32 MB   1    32
    7+:   64 MB   1    64
 
  The default value for "level" is 5.

  algo = 0 means fast method
  algo = 1 means normal method

dictSize - The dictionary size in bytes. The maximum value is
        128 MB = (1 << 27) bytes for 32-bit version
          1 GB = (1 << 30) bytes for 64-bit version
     The default value is 16 MB = (1 << 24) bytes.
     It's recommended to use the dictionary that is larger than 4 KB and
     that can be calculated as (1 << N) or (3 << N) sizes.

lc - The number of literal context bits (high bits of previous literal).
     It can be in the range from 0 to 8. The default value is 3.
     Sometimes lc=4 gives the gain for big files.

lp - The number of literal pos bits (low bits of current position for literals).
     It can be in the range from 0 to 4. The default value is 0.
     The lp switch is intended for periodical data when the period is equal to 2^lp.
     For example, for 32-bit (4 bytes) periodical data you can use lp=2. Often it's
     better to set lc=0, if you change lp switch.

pb - The number of pos bits (low bits of current position).
     It can be in the range from 0 to 4. The default value is 2.
     The pb switch is intended for periodical data when the period is equal 2^pb.

fb - Word size (the number of fast bytes).
     It can be in the range from 5 to 273. The default value is 32.
     Usually, a big number gives a little bit better compression ratio and
     slower compression process.

numThreads - The number of thereads. 1 or 2. The default value is 2.
     Fast mode (algo = 0) can use only 1 thread.

Out:
  destLen  - processed output size
Returns:
  SZ_OK               - OK
  SZ_ERROR_MEM        - Memory allocation error
  SZ_ERROR_PARAM      - Incorrect paramater
  SZ_ERROR_OUTPUT_EOF - output buffer overflow
  SZ_ERROR_THREAD     - errors in multithreading functions (only for Mt version)
*/

MY_STDAPI LzmaCompress(unsigned char *dest, size_t *destLen, const unsigned char *src, size_t srcLen,
  unsigned char *outProps, size_t *outPropsSize, /* *outPropsSize must be = 5 */
  int level,      /* 0 <= level <= 9, default = 5 */
  unsigned dictSize,  /* default = (1 << 24) */
  int lc,        /* 0 <= lc <= 8, default = 3  */
  int lp,        /* 0 <= lp <= 4, default = 0  */
  int pb,        /* 0 <= pb <= 4, default = 2  */
  int fb,        /* 5 <= fb <= 273, default = 32 */
  int numThreads /* 1 or 2, default = 2 */
  );

/*
LzmaUncompress
--------------
In:
  dest     - output data
  destLen  - output data size
  src      - input data
  srcLen   - input data size
Out:
  destLen  - processed output size
  srcLen   - processed input size
Returns:
  SZ_OK                - OK
  SZ_ERROR_DATA        - Data error
  SZ_ERROR_MEM         - Memory allocation arror
  SZ_ERROR_UNSUPPORTED - Unsupported properties
  SZ_ERROR_INPUT_EOF   - it needs more bytes in input buffer (src)
*/

MY_STDAPI LzmaUncompress(unsigned char *dest, size_t *destLen, const unsigned char *src, SizeT *srcLen,
  const unsigned char *props, size_t propsSize);

EXTERN_C_END

#endif
Commit	Line	Data
b24e7fce	1	/* LzmaLib.h -- LZMA library interface
	2	2013-01-18 : Igor Pavlov : Public domain */
	3
	4	#ifndef __LZMA_LIB_H
	5	#define __LZMA_LIB_H
	6
	7	#include "7zTypes.h"
	8
	9	EXTERN_C_BEGIN
	10
	11	#define MY_STDAPI int MY_STD_CALL
	12
	13	#define LZMA_PROPS_SIZE 5
	14
	15	/*
	16	RAM requirements for LZMA:
	17	for compression: (dictSize * 11.5 + 6 MB) + state_size
	18	for decompression: dictSize + state_size
	19	state_size = (4 + (1.5 << (lc + lp))) KB
	20	by default (lc=3, lp=0), state_size = 16 KB.
	21
	22	LZMA properties (5 bytes) format
	23	Offset Size Description
	24	0 1 lc, lp and pb in encoded form.
	25	1 4 dictSize (little endian).
	26	*/
	27
	28	/*
	29	LzmaCompress
	30	------------
	31
	32	outPropsSize -
	33	In: the pointer to the size of outProps buffer; *outPropsSize = LZMA_PROPS_SIZE = 5.
	34	Out: the pointer to the size of written properties in outProps buffer; *outPropsSize = LZMA_PROPS_SIZE = 5.
	35
	36	LZMA Encoder will use defult values for any parameter, if it is
	37	-1 for any from: level, loc, lp, pb, fb, numThreads
	38	0 for dictSize
	39
	40	level - compression level: 0 <= level <= 9;
	41
	42	level dictSize algo fb
	43	0: 16 KB 0 32
	44	1: 64 KB 0 32
	45	2: 256 KB 0 32
	46	3: 1 MB 0 32
	47	4: 4 MB 0 32
	48	5: 16 MB 1 32
	49	6: 32 MB 1 32
	50	7+: 64 MB 1 64
	51
	52	The default value for "level" is 5.
	53
	54	algo = 0 means fast method
	55	algo = 1 means normal method
	56
	57	dictSize - The dictionary size in bytes. The maximum value is
	58	128 MB = (1 << 27) bytes for 32-bit version
	59	1 GB = (1 << 30) bytes for 64-bit version
	60	The default value is 16 MB = (1 << 24) bytes.
	61	It's recommended to use the dictionary that is larger than 4 KB and
	62	that can be calculated as (1 << N) or (3 << N) sizes.
	63
	64	lc - The number of literal context bits (high bits of previous literal).
65	It can be in the range from 0 to 8. The default value is 3.
66	Sometimes lc=4 gives the gain for big files.
67
68	lp - The number of literal pos bits (low bits of current position for literals).
69	It can be in the range from 0 to 4. The default value is 0.
70	The lp switch is intended for periodical data when the period is equal to 2^lp.
71	For example, for 32-bit (4 bytes) periodical data you can use lp=2. Often it's
72	better to set lc=0, if you change lp switch.
73
74	pb - The number of pos bits (low bits of current position).
75	It can be in the range from 0 to 4. The default value is 2.
76	The pb switch is intended for periodical data when the period is equal 2^pb.
77
78	fb - Word size (the number of fast bytes).
79	It can be in the range from 5 to 273. The default value is 32.
80	Usually, a big number gives a little bit better compression ratio and
81	slower compression process.
82
83	numThreads - The number of thereads. 1 or 2. The default value is 2.
84	Fast mode (algo = 0) can use only 1 thread.
85
86	Out:
87	destLen - processed output size
88	Returns:
89	SZ_OK - OK
90	SZ_ERROR_MEM - Memory allocation error
91	SZ_ERROR_PARAM - Incorrect paramater
92	SZ_ERROR_OUTPUT_EOF - output buffer overflow
93	SZ_ERROR_THREAD - errors in multithreading functions (only for Mt version)
94	*/
95
96	MY_STDAPI LzmaCompress(unsigned char dest, size_t destLen, const unsigned char *src, size_t srcLen,
97	unsigned char outProps, size_t outPropsSize, /* outPropsSize must be = 5 /
98	int level, /* 0 <= level <= 9, default = 5 */
99	unsigned dictSize, /* default = (1 << 24) */
100	int lc, /* 0 <= lc <= 8, default = 3 */
101	int lp, /* 0 <= lp <= 4, default = 0 */
102	int pb, /* 0 <= pb <= 4, default = 2 */
103	int fb, /* 5 <= fb <= 273, default = 32 */
104	int numThreads /* 1 or 2, default = 2 */
105	);
106
107	/*
108	LzmaUncompress
109	--------------
110	In:
111	dest - output data
112	destLen - output data size
113	src - input data
114	srcLen - input data size
115	Out:
116	destLen - processed output size
117	srcLen - processed input size
118	Returns:
119	SZ_OK - OK
120	SZ_ERROR_DATA - Data error
121	SZ_ERROR_MEM - Memory allocation arror
122	SZ_ERROR_UNSUPPORTED - Unsupported properties
123	SZ_ERROR_INPUT_EOF - it needs more bytes in input buffer (src)
124	*/
125
126	MY_STDAPI LzmaUncompress(unsigned char dest, size_t destLen, const unsigned char src, SizeT srcLen,
127	const unsigned char *props, size_t propsSize);
128
129	EXTERN_C_END
130
131	#endif