Commit Graph

14 Commits

Author SHA1 Message Date
Evgenii Kliuchnikov
c3dc7d039c more careful bit-reader interruption
PiperOrigin-RevId: 548661043
2023-07-17 05:39:13 -07:00
Evgenii Kliuchnikov
e252f1fc15 0.5-2.9% decoder speedup
PiperOrigin-RevId: 529412095
2023-07-04 07:55:16 +00:00
Evgenii Kliuchnikov
f29c44ed38 Avoid nullptr with zero offset
PiperOrigin-RevId: 516808122
2023-07-04 07:53:51 +00:00
Evgenii Kliuchnikov
cb1ced3a25 speedup decoder by 0.2%-1.2%
PiperOrigin-RevId: 516754779
2023-07-04 07:53:42 +00:00
Evgenii Kliuchnikov
6db17c87f5 0.4-1.5% decoder speedup
PiperOrigin-RevId: 513248503
2023-07-04 07:53:20 +00:00
Evgenii Kliuchnikov
b2c86d1871 Decoder API: added API to attach metadata blocks callbacks
PiperOrigin-RevId: 505734532
2023-01-31 16:03:16 +00:00
Evgenii Kliuchnikov
a8f5813b84 Update
Documentation:
  - add note that brotli is a "stream" format, not an archive-like
  - regenerate .1 with Pandoc
Build:
  - drop legacy "BROTLI_BUILD_PORTABLE" option
  - drop "BROTLI_SANITIZED" definition
Code:
  - c: comb includes
  - c/enc: extract encoder state into separate header
  - c/enc: drop designated q10 codepath
  - c/enc: dealing better with flushing of empty stream
  - fix MSVC compilation
API:
  - py: use library version instead of one in version.h
  - c: add plugable API to report consumed input / produced output
  - c/java: support "lean" prepared dictionaries (without copy of source)
2022-11-17 13:03:09 +00:00
Eugene Kliuchnikov
f8c6717745
Update (#908)
* re-enable Js build/test
  * improve decoder performance
  * rewrite dictionary data in Java/Js to a shorter uncompressed form
  * improve dictionary generation tool
2021-06-23 09:40:57 +02:00
Eugene Kliuchnikov
223d80cfbe
Update (#826)
* IMPORTANT: decoder: fix potential overflow when input chunk is >2GiB
 * simplify max Huffman table size calculation
 * eliminate symbol duplicates (static arrays in .h files)
 * minor combing in research/ code
2020-08-26 12:32:27 +02:00
Eugene Kliuchnikov
4b2b2d4f83
Update (#749)
Update:

 * Bazel: fix MSVC configuration
 * C: common: extended documentation and helpers around distance codes
 * C: common: enable BROTLI_DCHECK in "debug" builds
 * C: common: fix implicit trailing zero in `kPrefixSuffix`
 * C: dec: fix possible bit reader discharge for "large-window" mode
 * C: dec: simplify distance decoding via lookup table
 * C: dec: reuse decoder state members memory via union with lookup table
 * C: dec: add decoder state diagram
 * C: enc: clarify access to static dictionary
 * C: enc: improve static dictionary hash
 * C: enc: add "stream offset" parameter for parallel encoding
 * C: enc: reorganize hasher; now Q2-Q3 require exactly 256KiB
           to avoid global TCMalloc lock
 * C: enc: fix rare access to uninitialized data in ring-buffer
 * C: enc: reorganize logging / checks in `write_bits.h`
 * Java: dec: add "large-window" support
 * Java: dec: improve speed
 * Java: dec: debug and 32-bit mode are now activated via system properties
 * Java: dec: demystify some state variables (use better names)
 * Dictionary generator: add single input mode
 * Java: dec: modernize tests
 * Bazel: js: pick working commit for closure rules
2019-04-12 13:57:42 +02:00
Eugene Kliuchnikov
09cd3e877f
Update 2018-06-11 15:17:26 +02:00
Eugene Kliuchnikov
35e69fc7cf
New feature: "Large Window Brotli" (#640)
* New feature: "Large Window Brotli"

By setting special encoder/decoder flag it is now possible to extend
LZ-window up to 30 bits; though produced stream will not be RFC7932
compliant.

Added new dictionary generator - "DSH". It combines speed of "Sieve"
and quality of "DM". Plus utilities to prepare train corpora
(remove unique strings).

Improved compression ratio: now two sub-blocks could be stitched:
the last copy command could be extended to span the next sub-block.

Fixed compression ineffectiveness caused by floating numbers rounding and
wrong cost heuristic.

Other C changes:
 - combined / moved `context.h` to `common`
 - moved transforms to `common`
 - unified some aspects of code formatting
 - added an abstraction for encoder (static) dictionary
 - moved default allocator/deallocator functions to `common`

brotli CLI:
 - window size is auto-adjusted if not specified explicitly

Java:
 - added "eager" decoding both to JNI wrapper and pure decoder
 - huge speed-up of `DictionaryData` initialization

* Add dictionaryless compressed dictionary

* Fix `sources.lst`

* Fix `sources.lst` and add a note that `libtool` is also required.

* Update setup.py

* Fix `EagerStreamTest`

* Fix BUILD file

* Add missing `libdivsufsort` dependency

* Fix "unused parameter" warning.
2018-02-26 09:04:36 -05:00
Eugene Kliuchnikov
da254cffdb
Update (#630)
* merge {dec|enc}/port.h into common/platform.h
 * fix one-shot q=10 1-byte input compression
 * fix some unprefixed definitions
 * make hashers host-endianness-independent
 * extract enc/params.h from enc/quality.h
 * fix API documentation / typos
 * improve `BrotliEncoderMaxCompressedSize`
2017-12-12 14:33:12 +01:00
Eugene Kliuchnikov
6ece1d8791 Move files & update paths (#541)
* Move files & update paths

* Rename build to scripts.

* Fix paths

* Fix script.
2017-04-23 14:07:08 +02:00