Zoltan Szabadka
3b8bef70a5
Add extern "C" linkage to the encoder and decoder dictionary definitions.
2015-10-01 14:30:22 +02:00
Zoltan Szabadka
03c4ab5967
Simplify uncompressed block decoding state machine.
2015-09-28 12:40:39 +02:00
Zoltan Szabadka
5919712922
Avoid undefined behavior from memcpy for the portable build.
2015-09-28 12:38:29 +02:00
Zoltan Szabadka
10aaa83ffe
Fix a bug in ReadHuffmanCode().
2015-09-28 12:37:35 +02:00
Zoltan Szabadka
3cd3a1066a
Small speedup of command decoding.
2015-09-28 12:34:40 +02:00
Zoltan Szabadka
e44caf9835
Introduce a BROTLI_BUILD_PORTABLE macro to disable potentially dangerous optimizations.
2015-09-25 17:57:19 +02:00
Zoltan Szabadka
85301238ea
Fix a bug in CopyUncompressedBlockToOutput().
2015-09-25 17:43:54 +02:00
Zoltan Szabadka
163b59b160
Add null output callback to decoder for easier testing.
2015-09-25 12:07:07 +02:00
Zoltan Szabadka
b04f6248be
Fix a bug in uncompressed block handling.
2015-09-25 12:05:39 +02:00
Zoltan Szabadka
0cf3a54422
Update brotli decoder with latest improvements.
2015-09-24 18:35:25 +02:00
Zoltan Szabadka
1216684d0b
Merge remote-tracking branch 'upstream/master'
2015-09-23 12:26:07 +02:00
Zoltan Szabadka
a7cedfc26d
Update brotli decoder with latest improvements.
2015-09-23 12:24:06 +02:00
Marcin Karpinski
21ac39f7c8
Fix typos.
2015-09-21 21:04:07 +02:00
Eugene Klyuchnikov
127aa48a96
Fix bug in decoder.
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Minor cleanup.
2015-09-01 12:18:22 +02:00
Lode Vandevenne
db71549ac5
update brotli decoder with latest improvements
2015-08-28 15:20:24 +02:00
Zoltan Szabadka
944c3b8290
Remove non-standard <malloc.h> from decode.c
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The already included <stdlib.h> is enough for the malloc/free calls.
2015-08-11 11:07:26 +02:00
Zoltan Szabadka
4b2fd00e24
Use a single lookup table for insert/copy offsets and extra bits.
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Remove safe_malloc.c since all the bounds checking is done inside
decode.c now.
2015-08-10 16:39:50 +02:00
lvandeve
45c38936b7
Enable little endian support also for visual studio
2015-08-10 14:41:42 +02:00
Lode Vandevenne
fee303fd87
fix brotli decoder MSVC compilation error
2015-08-10 14:18:37 +02:00
Lode Vandevenne
94cd7085f7
brotli decoder performance improvements
2015-08-10 13:35:23 +02:00
Lode Vandevenne
bad0f4edf1
Brotli Bug Fixes
2015-06-26 17:37:00 +02:00
Zoltan Szabadka
b43df8f699
Brotli custom LZ77 dictionary support.
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Adds functions to prepend such dictionary to the
encoder and decoder, and twiddles their internal
parameters to do as if that was a previous part of
the input. This dictionary is just a prefilled LZ77
window, it is not related to the built in transformable
brotli dictionary.
2015-06-12 15:43:54 +02:00
Zoltan Szabadka
641bc15882
Speedups and fixes to the decoder.
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* Read data by 4-byte runs.
This resolves unaligned read (Bus error) on arm-android.
* Get rid of malloc/free in BrotliBuildHuffmanTable.
* Tweak order of instructions when reading Huffman codes.
2015-06-12 15:12:23 +02:00
Zoltan Szabadka
bef6938af7
Restrict the ARM optimizations to little endian architectures.
2015-05-07 20:36:35 +02:00
Zoltan Szabadka
f3e71e441e
Fix 32bit build.
2015-05-07 19:45:21 +02:00
Zoltan Szabadka
54f69c9ef7
Support window bits 10 - 15 in the decoder.
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The previous window bit value 17 is used to
extend the range, since it has not been used
in any previous encoders.
2015-05-07 17:44:33 +02:00
Zoltan Szabadka
5f39d607ef
Decoder optimizations for ARM architecture.
2015-05-07 17:10:27 +02:00
Zoltan Szabadka
83aa24dc86
Speed and memory usage improvements for the decoder.
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* Change order of members of bit reader state structure.
* Remove unused includes for assert. Add BROTLI_DCHECK
macros and use it instead of assert.
* Do not calculate nbits in common case of ReadSymbol.
* Introduce and use PREDICT_TRUE / PREDICT_FALSE macros.
* Allocate less memory in the brotli decoder if it knows
the result size beforehand. Before this, the decoder
would always allocate 16MB if the encoder annotated the
window size as 22 bit (which is the default), even if the
file is only a few KB uncompressed. Now, it'll only
allocate a ringbuffer as large as needed for the result file.
But only if it can know the filesize, it's not possible
to know that if there are multiple metablocks or too large
uncompressed metablock.
2015-05-07 16:53:43 +02:00
Zoltan Szabadka
fe14d7b32a
Fix an error propagation bug in the decoder.
2015-04-28 10:07:12 +02:00
szabadka
0c81a1360b
Merge pull request #35 from mitya57/master
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Makefile fixes and cleanups
2015-04-23 12:05:39 +02:00
Zoltan Szabadka
64c261113f
Add partial output support to the decoder.
2015-04-22 17:33:21 +02:00
Zoltan Szabadka
28b1f7a6b1
Implement some stricter format checks in the decoder.
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- Reject brotli streams where the number of
nibbles is too large for the size of the
meta-block
- Reject brotli streams where the padding
bits after a meta-block are not all zero
- Reject brotli streams where the symbol
in the simple prefix code is not in
the symbol alphabet
2015-04-22 14:35:21 +02:00
Zoltan Szabadka
a81f2ef433
Decoder support for new empty meta-block format.
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This change enforces the new 16MB limit on the
size of the meta-blocks and adds support for
empty meta-blocks with optional ignored metadata.
2015-04-22 14:25:08 +02:00
Zoltan Szabadka
2a7bbfc553
Update the previous two bytes when decoding an
...
uncompressed metablock.
2015-04-01 16:23:18 +02:00
Zoltan Szabadka
fac8993bef
Add a missing state transition to CopyUncompressedBlockToOutput().
2015-04-01 16:20:16 +02:00
Zoltan Szabadka
fe6e5d1cd9
Faster decoder for data with trivial context maps.
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This makes it 20% faster when decoding data with
trivial context map (where the histogram type
depends only on the block type and not the
context).
2015-04-01 16:15:39 +02:00
Lode Vandevenne
f9e5a2d9f2
bugfixes affecting streaming decoding
2015-03-30 18:00:40 +02:00
Zoltan Szabadka
8f3092a0b1
Add some missing state transitions to DecodeContextMap().
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Update the states in DecodeContextMap to the next one,
else it would continue at the wrong spot if exactly there
the partial input is split.
2015-03-30 13:39:20 +02:00
Zoltan Szabadka
c5ccd0dff9
Change the return value of decoder functions from integer codes to an enum.
2015-03-27 13:54:43 +01:00
Lode Vandevenne
85abce6c6e
Propagate error condition from ReadHuffmanCodeLengths()
2015-03-26 17:40:07 +01:00
Lode Vandevenne
b142207917
a few more tweaks to the streaming support
2015-03-20 17:03:11 +01:00
Lode Vandevenne
8270250b40
support for partial input (streaming)
2015-03-20 16:13:15 +01:00
Lode Vandevenne
81cb09f1b3
separate the licenses from documentation
2015-03-20 15:44:15 +01:00
Dmitry Shachnev
5da7e37a06
Makefile fixes and cleanups
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- Distinguish between CC/CFLAGS, CPP/CPPFLAGS and CXX/CXXFLAGS.
Do not store compiler flags in CPPFLAGS, which is for preprocessor,
and do not try to link files using a preprocessor.
- Use COMMON_FLAGS for flags that are for both C and C++.
- Drop -m64 flag which is wrong on 32-bit systems.
- Use $(MAKE) instead of make, so that parallel building works.
2015-03-14 14:31:44 +03:00
Zoltan Szabadka
6da0c5c992
Implement a 32-bit bitstream decoder.
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The 64-bit bitstream decoder seems to have portability problems
with emscripten/asm.js as it does not compile into working code.
2015-02-25 13:32:17 +01:00
Zoltan Szabadka
68d63f5966
Fix a sign-conversion warning in the decoder.
2015-02-24 11:22:29 +01:00
Kunihiko Sakamoto
65d655dad5
Compile decoder with -Wall flag
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This also fixes two "comparison between signed and unsigned" warnings.
2015-02-24 17:48:26 +09:00
Zoltan Szabadka
4278934e82
Fix undefined behavior in decoder.
...
Use memmove() for copying overlapping buffers.
2014-11-26 10:37:33 +01:00
Zoltan Szabadka
ac455c50f4
Improvements to the command-line tool.
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- 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
