greg/pcompress
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity
381 commits 3 branches 21 tags 7.6 MiB
Commit graph

56 commits

Author SHA1 Message Date
Moinak Ghosh
9ecbbbafd0 Pull in private copy of libarchive to add pcmpress-specific functionality. 
First step to add packPNM support.
 2014-09-11 18:34:43 +05:30
Moinak Ghosh
0433452b37 Miscellaneous refactoring. 
Add some headers for OSX.
 2014-05-24 23:52:30 +05:30
Moinak Ghosh
63bef473cc Working MAC OS X port. 
Compatibility layer for semaphore handling.
 2014-05-04 21:11:31 +05:30
Moinak Ghosh
4b037f0ed7 More portability tweaks. 2014-05-04 11:54:33 +05:30
Moinak Ghosh
6fba8aa8ac More OSX compatibility code. 
Fix new warnings with Gcc 4.8.
 2014-04-28 00:12:51 +05:30
Moinak Ghosh
683c3e48b5 Detect some DICOM formats and use BSC for DICOM data. 2014-01-01 19:44:58 +05:30
Moinak Ghosh
ea345a902a Overhaul documentation part #1 
Detect and handle uncompressed PDF files using libbsc.
Force binary/text data detection for tar archives.
Get rid of unnecessary CLI option.
Add full pipeline mode check when archiving.
 2013-12-30 23:24:37 +05:30
Moinak Ghosh
5521955a94 Detect AR archives and set the type. 
Re-use a less common type code for AR.
Use Dispack generically for all executables and AR archives.
 2013-12-18 23:00:39 +05:30
Moinak Ghosh
5e484f0694 Use libbsc for AVI and MP4 files. 2013-12-04 20:07:52 +05:30
Moinak Ghosh
3f62cdf7d5 Use Libbsc for MP4 and FLAC files. 
Change some rare file type codes to indicate some common types.
 2013-12-03 21:56:07 +05:30
Moinak Ghosh
dfeea8c19b Avoid Delta2,LZP for TIFF files. Negatively impacts compression. 2013-11-29 19:47:57 +05:30
Moinak Ghosh
306f145f22 Use libbsc/ppmd for BMP files. 
Fix extension based hashing.
Do not append .pz extension to filenames already having it.
Some code formatting changes.
 2013-11-28 22:42:51 +05:30
Moinak Ghosh
0192790c02 Add Dispack filter with auto-detection of x86 executables in archive mode. 
More elaborate magic header based detection of 32-bit and 64-bit x86 binaries.
Always use fast-mode LZ4 in Adaptive modes.
 2013-11-24 19:45:58 +05:30
Moinak Ghosh
1e2c3e479a Optimize preprocessed compression and avoid a bunch of memory copies. 
Fix a crash.
Add a few more file types.
More comments.
 2013-11-22 20:44:26 +05:30
Moinak Ghosh
11584cab52 Add fast handling of totally incompressible data (like Jpegs) in adaptive modes. 
Add function to indicate totally incompressible data when archiving.
Reformat if statements in some places to reduce branching.
 2013-11-15 21:06:23 +05:30
Moinak Ghosh
e90c52e516 Work in progress changes for packJPG encoding and decoding. 
Enhance custom LibArchive filter functionlity.
 2013-11-13 23:28:01 +05:30
Moinak Ghosh
6aacd903ff Structured handling of file types. 
Handling of already compressed data based on compression algorithm.
Add a few more extension types.
 2013-11-09 16:46:19 +05:30
Moinak Ghosh
cae9de9b2e Leverage file type detection(archiver) to improve compression performance. 
Use detected file/data type(archiver) for Adaptive compression modes.
Update type flags and add more extensions.
 2013-11-08 23:50:28 +05:30
Moinak Ghosh
991482403b Add extension based file type detection and setting segment data type. 
Use Bob Jenkins Minimal Perfect Hash to check for known extensions.
Use semaphore signaling and direct buffer copy for extraction.
Miscellaneous fixes.
 2013-11-07 21:48:54 +05:30
Moinak Ghosh
7ed532133e Avoid using pipe during archive creation. Use semaphores and direct memory copy. 2013-11-02 23:43:59 +05:30
Moinak Ghosh
8e4b774c8c More changes for archiving. 
Allow multiple filenames on command line when archiving.
Remove unneded small block writes with libarchive.
 2013-10-27 20:36:48 +05:30
Moinak Ghosh
7f81869874 Archiving support using Libarchive: Work in progress changes. 
Change all perror() calls to use logger.
Make the config script a little verbose.
 2013-10-20 23:54:27 +05:30
Moinak Ghosh
8c1f4ebe61 Add a simple log facility. 
Refactor all printfs to use log facility.
 2013-10-02 20:45:33 +05:30
Moinak Ghosh
fa78621cbf Cleanup pointer casting in code to use macros. 2013-09-22 20:11:15 +05:30
Moinak Ghosh
38c0869f5c Update Changelog and tweak free memory detection for 2.4 release. 
Add identifiers to error messages for clarity.
Fix init of dedupe block size.
Tweak free memory detection to include swap and shared memory consideration.
 2013-09-05 21:12:37 +05:30
Moinak Ghosh
7743792018 Make default symbol visibility to hidden with explicit public visibility specified. 
Add missing static scope to a few more places.
 2013-06-03 20:51:00 +05:30
Moinak Ghosh
c859cf35d5 Make Pcompress functionality into a library - initial changes. 2013-06-02 20:54:33 +05:30
Moinak Ghosh
c6da2325e3 Allow SKEIN to be used as a Global Dedupe chunk lookup hash. 2013-05-04 15:59:29 +05:30
Moinak Ghosh
6e4d45b644 Fix crash with some older GCC versions. Reported in issue #7. 2013-05-01 19:27:43 +05:30
Moinak Ghosh
d29f125ca7 Clean up temp cache dir handling. 
Allow temp dir setting via specific env variable to point to fast devices like ramdisk,ssd.
 2013-04-22 22:57:31 +05:30
Moinak Ghosh
c0b4aa0116 Many optimizations and changes to Segmented Global Dedupe. 
Use chunk hash based similarity matching rather than content based.
Use sorting to order hash buffer rather than min-heap for better accuracy.
Use fast CRC64 for similarity hash for speed and lower memory requirements.
 2013-04-21 18:11:16 +05:30
Moinak Ghosh
50251107de Work in progress changes for Segmented Global Deduplication. 2013-04-09 22:23:51 +05:30
Moinak Ghosh
876796be5c Work in progress changes for global dedupe. 2013-03-21 22:00:38 +05:30
Moinak Ghosh
b7fdeb08bc Work in progress global dedupe changes. 2013-03-20 22:47:03 +05:30
Moinak Ghosh
f8f23e5200 Major License text cleanup. 2013-03-07 20:26:48 +05:30
Moinak Ghosh
cf053c0257 Fix increment of XSalsa20 192-bit nonce value. 
Handle nonce bytes in endian neutral way.
 2013-03-04 23:48:12 +05:30
Moinak Ghosh
6badbcaea7 Make global dedupe bits buildable and fix errors. 
Rename Adaptive compression type constants to avoid conflict with global constants.
 2013-02-17 21:05:40 +05:30
Moinak Ghosh
1eae57c8a2 Starting changes for single-file global dedupe. 2013-02-12 21:53:04 +05:30
Moinak Ghosh
d08b5ea399 Add optimized BLAKE2 implementations with runtime detection of CPU capability (SSE/AVX). 
Minor cleanups.
 2013-01-26 15:39:10 +05:30
Moinak Ghosh
26bb137257 Changes for generalized runtime SSE/AVX/XOP detection. 
Multi instruction set XXhash build with runtime selection.
Extend CPUID code to detect more instruction sets.
Add options for BLAKE2 hash.
Move GCC builtins into utils header.
Bump file format version number due to extended digest flags.
Add descriptions to digest list.
 2013-01-25 00:10:12 +05:30
Moinak Ghosh
e9e3e1e632 Improve SSE version detection. 
Add SSE4 detection.
Fix setting of some opt flags in Makefile.in.
 2013-01-20 22:53:36 +05:30
Moinak Ghosh
39dbc4be43 Implement algo-specific minimum distance match for Delta Compression. 2013-01-14 13:20:07 +05:30
Moinak Ghosh
d49a088eea Fixes and performance improvements for Dedupe Delta Compression 
Avoid using fingerprints in minhash computation and fix write amplification
Modify min-heap to use 64bit values
Improve bsdiff performance
Fix pointer comparison in bsdiff
Use 32bit offsets in bsdiff to reduce memory usage
Improve Zero RLE Encoder performance
Add more buffer overflow checks in Zero RLE Decoder
 2013-01-13 22:04:59 +05:30
Moinak Ghosh
36d95276ee Further improvements to Delta2 performance. 
Fix the byteswap macros.
Start adding assertions.
 2012-12-28 22:12:38 +05:30
Moinak Ghosh
26a4f42506 Introduce strict compiler flags and fix scores of warnings/issues. 
Avoid different optimization flags for Dedupe sources.
Fix liberal mixing of uint64_t and int64_t (should all be uint64_t).
Fix corner case crash when decompressing.
 2012-12-27 23:06:48 +05:30
Moinak Ghosh
a43fdd7d2c Improve Delta2 scanning speed and effectiveness. 
Add destination buffer overflow check in Delta2.
Add rough speed computation.
 2012-12-23 00:44:56 +05:30
Moinak Ghosh
b0f41c2888 Add matrix transpose to Delta2 encoding. 
Change confusing structure member name.
 2012-12-13 21:18:16 +05:30
Moinak Ghosh
224fb529e9 Get rid of size_t in places where 64-bitness is assumed. 2012-12-09 10:15:06 +05:30
Moinak Ghosh
29b0d8fd7b Implement Adaptive Delta Encoding. 2012-12-05 00:09:47 +05:30
Moinak Ghosh
d054e0f713 Zlib optimizations. Use raw deflate streams to avoid unnecessary adler32. 
Change some function signatures to improve algo init function behavior.
Fix corner case dedupe bug in error handling flow.
Bump archive version signature.
 2012-11-22 21:02:50 +05:30