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Author SHA1 Message Date
szabadka
88c073594f Merge pull request #18 from khaledhosny/gitignore 
Add .gitignore file
 2014-11-24 10:20:04 +01:00
Khaled Hosny
9efdff7f70 Add .gitignore file 2014-11-22 17:00:36 +02:00
szabadka
94000f6490 Merge pull request #16 from szabadka/master 
Add command-line tool and tests.
 2014-11-17 15:40:22 +01:00
Zoltan Szabadka
ac455c50f4 Improvements to the command-line tool. 
- Don't read the whole input to memory.
- Support reading from stdin and writing to stdout.
 2014-11-17 15:31:00 +01:00
Zoltan Szabadka
e1739826c0 Add command-line tool and tests. 2014-10-30 13:59:37 +01:00
szabadka
6b9ce4dfab Merge pull request #15 from szabadka/master 
Disable transforms in the encoder by default.
 2014-10-29 17:09:47 +01:00
Zoltan Szabadka
96d04e53d7 Disable transforms in the encoder by default. 
This change reduces the startup-time of the encoder considerably.
 2014-10-29 15:39:35 +01:00
szabadka
6e9e963972 Merge pull request #14 from szabadka/master 
Allow use of inline keyword in c++/c99 mode.
 2014-10-28 14:44:24 +01:00
Zoltan Szabadka
dd6237b0e8 Allow use of inline keyword in c++/c99 mode. 2014-10-28 14:43:15 +01:00
szabadka
37aa5e05c0 Merge pull request #13 from szabadka/master 
Fix potential output buffer overflow in encoder.
 2014-10-28 14:06:46 +01:00
Zoltan Szabadka
485ad82e94 Fix potential output buffer overflow in encoder. 2014-10-28 14:05:53 +01:00
szabadka
2f35ffd77a Merge pull request #12 from szabadka/master 
Decoder code cleanup.
 2014-10-28 14:02:06 +01:00
Zoltan Szabadka
460dda1b50 Decoder code cleanup. 
1) Use a tighter upper bound on the Huffman table size.
2) Remove unused argument len in ToUpperCase.
3) Remove unused no-op assignment in BrotliDecompress.
4) Fix include guard name.
 2014-10-28 13:57:46 +01:00
szabadka
43a8d591f0 Merge pull request #11 from szabadka/master 
Move the context map encoding function to the brotli_bit_stream library.
 2014-10-28 13:49:32 +01:00
Zoltan Szabadka
0428f2d1bd Move the context map encoding function to the brotli_bit_stream library. 2014-10-28 13:47:21 +01:00
szabadka
d0d6f1bda4 Merge pull request #10 from szabadka/master 
Make the histogram clustering function more generic.
 2014-10-28 13:38:14 +01:00
Zoltan Szabadka
f321ba1964 Make the histogram clustering function more generic. 
Change the template parameter to be the histogram class
instead of the alphabet size of the histogram.
 2014-10-28 13:36:21 +01:00
szabadka
c6c08e492e Merge pull request #9 from szabadka/master 
New version of the backward reference search code.
 2014-10-28 13:33:33 +01:00
Zoltan Szabadka
b4f39bf540 New version of the backward reference search code. 
The new	interface of the backward reference search
function makes it possible to use it in	a streaming
manner.

Using the advanced cost model and static dictionary
can be turned on/off by	template parameters.

The distance short codes are now computed as part of
the backward reference search.

Added a	faster version of the Hasher.
 2014-10-28 13:25:22 +01:00
szabadka
f580616386 Merge pull request #8 from szabadka/master 
Minor tuning of encoder heuristics.
 2014-10-28 12:54:47 +01:00
Zoltan Szabadka
03b20347e1 Minor tuning of encoder heuristics. 2014-10-28 12:50:33 +01:00
szabadka
8102921a7c Merge pull request #7 from szabadka/master 
Fix storing of the meta-block header for last empty meta-block.
 2014-10-28 12:10:55 +01:00
Zoltan Szabadka
ca8c2890aa Fix storing of the meta-block header for last empty meta-block. 2014-10-28 12:09:18 +01:00
szabadka
618ea06821 Merge pull request #6 from szabadka/master 
Move the block switch storing functions to the brotli_bit_stream library...
 2014-10-28 12:03:34 +01:00
Zoltan Szabadka
467e6eef80 Move the block switch stroing functions to the brotli_bit_stream library. 2014-10-28 11:53:52 +01:00
szabadka
fd64d1f35a Merge pull request #3 from szabadka/encoder 
Factor out serialization functions into their own file.
 2014-10-28 11:19:18 +01:00
szabadka
c62fa2116f Merge pull request #2 from szabadka/decoder 
Fix BrotliDecompressedSize() to work for an uncompressed plus an empty meta-block.
 2014-10-27 17:36:07 +01:00
Zoltan Szabadka
39cde017e6 Fix TODO markups. 2014-10-15 14:14:34 +02:00
Zoltan Szabadka
d6d9fc60e1 Factor out serialization functions into their own file. 
Create a brotli_bit_stream library that is responsible for writing
various structures (headers, Huffman codes, etc.) directly into the
bit-stream.
 2014-10-15 14:01:36 +02:00
Zoltan Szabadka
79d2b89d2d Fix BrotliDecompressedSize() to work for an uncompressed plus an empty meta-block. 2014-10-15 13:41:00 +02:00
Zoltan Szabadka
12c6d1fbe4 Apply const qualifier to call operator of comparator class. 2014-10-15 13:33:56 +02:00
Zoltan Szabadka
fe6e9b0148 Remove broken Makefiles. 
Makefiles will be added together with a command-line interface in a
later commit.
 2014-10-14 13:39:48 +02:00
Zoltan Szabadka
e8d668f873 Add top-level README file. 
Remove brotlispec.txt and add a link to the latest internet-draft instead.
 2014-10-14 13:08:35 +02:00
Zoltan Szabadka
3f655b63de Fix buffer overflow bug in the brotli encoder. 2014-03-27 16:38:07 +01:00
Zoltan Szabadka
347781947a Update the dictionary and the transforms. 2014-03-25 16:48:25 +01:00
Zoltan Szabadka
e7650080a8 Updates to Brotli compression format, decoder and encoder 
This commit contains a batch of changes that were made to the Brotli
compression algorithm in the last month. Most important changes:

   * Format change: don't push distances representing static dictionary words to the distance cache.
   * Fix decoder invalid memory access bug caused by building a non-complete Huffman tree.
   * Add a mode parameter to the encoder interface.
   * Use different hashers for text and font mode.
   * Add a heuristics to the hasher for skipping non-compressible data.
   * Exhaustive search of static dictionary during backward reference search.
 2014-03-20 14:32:35 +01:00
Zoltan Szabadka
cddab4adef Enable the static dictionary in the Brotli decoder. 2014-03-06 17:25:43 +01:00
Zoltan Szabadka
2f268ad158 Add the initial version of the static dictionary and transforms to Brotli. 2014-02-17 14:25:36 +01:00
Zoltan Szabadka
0454ab4ec0 Updates to Brotli compression format, decoder and encoder 
This commit contains a batch of changes that were made to the Brotli
compression algorithm in the last month. Most important changes:

   * Fixes to the spec.
   * Change of code length code order.
   * Use a 2-level Huffman lookup table in the decoder.
   * Faster uncompressed meta-block decoding.
   * Optimized encoding of the Huffman code.
   * Detection of UTF-8 input encoding.
   * UTF-8 based literal cost modeling for improved
     backward reference selection.
 2014-02-14 15:04:23 +01:00
Zoltan Szabadka
d01c71c4ad Fix -Wconversion compiler warnings in the brotli decoder. 2014-01-08 12:34:35 +01:00
Zoltan Szabadka
2bcd58bb5a Brotli format change: small improvement to the encoding of Huffman codes 
Combine the HSKIP and the simple/complex Huffman code type bits.
 2014-01-08 12:28:28 +01:00
Zoltan Szabadka
e60dbdb10b Small update to brotli specification. 
Clarify how to recover from error conditions caused by overflowing
block types and symbol values.
 2014-01-06 16:35:24 +01:00
Zoltan Szabadka
d762bc6845 Bug fixes for the brotli encoder and decoder. 2014-01-06 16:01:57 +01:00
Zoltan Szabadka
1447345cbb Brotli format change: improved encoding of Huffman codes 
This change removes the redundant HCLEN, HLENINC and HLEN
fields from the encoding of the complex Huffman codes and
derives these from an invariant of the code length sequence.
Based on a patch by Robert Obryk.
 2013-12-17 17:17:57 +01:00
Zoltan Szabadka
b8a1008569 Use C-style comments in the brotli decoder. 2013-12-16 14:45:57 +01:00
Zoltan Szabadka
29bb7cb1af Fix Microsoft VisualStudio 64-bit build of brotli 2013-12-13 15:30:20 +01:00
Zoltan Szabadka
354349d7ae Fix Microsoft VisualStudio build of brotli 
- Move all variable declarations to the beginning of the block
- #ifdef-out read/write calls
 2013-12-13 10:39:46 +01:00
Roderick Sheeter
c23cb1e83d Support for OSX build; tested using OSX 10.9/clang-500.2.79 2013-12-12 10:43:05 -08:00
Zoltan Szabadka
60c24c0c2d Updates to Brotli compression format, decoder and encoder 
This commit contains a batch of changes that were made to the Brotli
compression algorithm in the last month. Most important changes:

   * Updated spec
   * Changed Huffman code length alphabet to use run length codes more
     efficiently, based on a suggestion by Robert Obryk
   * Changed encoding of the number of Huffman code lengths (HLEN)
   * Changed encoding of the number of Huffman trees (NTREES)
   * Added support for uncompressed meta-blocks
 2013-12-12 13:18:04 +01:00
Zoltan Szabadka
8d7081f2d0 Add draft specification of the brotli format 2013-11-28 17:37:13 +01:00