Commit Graph

10 Commits

Author SHA1 Message Date
dan sinclair
5fc011b453
Move bit_stream, move_to_front and huffman_codec. (#1833)
bit_stream, move_to_front and huffman_codec are only used by
source/tools. Move into that directory to make the usage clearer.
2018-08-14 09:52:05 -04:00
dan sinclair
508df9a387
Remove unused bit stream methods. (#1807)
This CL deletes methods from bit stream which are never used and moves
several to the anonymous namespace in the bit_stream test file.
2018-08-07 09:10:54 -04:00
dan sinclair
eda2cfbe12
Cleanup includes. (#1795)
This Cl cleans up the include paths to be relative to the top level
directory. Various include-what-you-use fixes have been added.
2018-08-03 15:06:09 -04:00
dan sinclair
76e0bde196 Move utils/ to spvtools::utils
Currently the utils/ folder uses both spvutils:: and spvtools::utils.
This CL changes the namespace to consistenly be spvtools::utils to match
the rest of the codebase.
2018-07-06 16:47:46 -04:00
Diego Novillo
83228137e1 Re-format source tree - NFC.
Re-formatted the source tree with the command:

$ /usr/bin/clang-format -style=file -i \
    $(find include source tools test utils -name '*.cpp' -or -name '*.h')

This required a fix to source/val/decoration.h.  It was not including
spirv.h, which broke builds when the #include headers were re-ordered by
clang-format.
2017-11-27 14:31:49 -05:00
Andrey Tuganov
d41a52415a Fix encode zero bits on word boundary bug
Bit stream writer was manifesting incorrect behaviour when the following
two conditions were met:
- writer was on 64-bit word boundary
- WriteBits was invoked with num_bits=0 (can happen when a Huffman codec has only one
value)

The bug was causing very rare sporadic corruption which was detected by
tests after a random experimental change in MARK-V model.
2017-08-28 13:36:39 -04:00
Andrey Tuganov
e842c17eb5 Added fixed width encoding to bit_stream
Fixed width encoding is intended to be used for small unsigned integers
when the upper bound is known both to the encoder and the decoder
(for example move-to-front rank).
2017-07-04 11:57:13 -04:00
Andrey Tuganov
73e8dac5b9 Added compression tool tools/spirv-markv. Work in progress.
Command line application is located at tools/spirv-markv
API at include/spirv-tools/markv.h

At the moment only very basic compression is implemented, mostly varint.
Scope of supported SPIR-V opcodes is also limited.

Using a simple move-to-front implementation instead of encoding mapped
ids.

Work in progress:
- Does not cover all of SPIR-V
- Does not promise compatibility of compression/decompression across
  different versions of the code.
2017-06-30 12:22:48 -04:00
David Neto
eb720b2ad1 Fix size_t conversion error on MinGW 2017-05-15 11:55:22 -04:00
Andrey Tuganov
3eb716cae4 Added bit stream utils
Also added generalized zigzag coding.
- Due to signed integers being mostly non-negative, improved zigzag coding
  to favor positive values.
2017-05-12 17:08:33 -04:00