Index: third_party/lzma_sdk/LzmaLib.h |
=================================================================== |
--- third_party/lzma_sdk/LzmaLib.h (revision 0) |
+++ third_party/lzma_sdk/LzmaLib.h (revision 0) |
@@ -0,0 +1,135 @@ |
+/* LzmaLib.h -- LZMA library interface |
+2009-04-07 : Igor Pavlov : Public domain */ |
+ |
+#ifndef __LZMA_LIB_H |
+#define __LZMA_LIB_H |
+ |
+#include "Types.h" |
+ |
+#ifdef __cplusplus |
+extern "C" { |
+#endif |
+ |
+#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); |
+ |
+#ifdef __cplusplus |
+} |
+#endif |
+ |
+#endif |
Property changes on: third_party/lzma_sdk/LzmaLib.h |
___________________________________________________________________ |
Added: svn:eol-style |
+ LF |