Multithreading Library for Brotli, Lizard, LZ4, LZ5, Snappy-c, LZFSE and Zstandard
Description
- works with skippables frame id 0x184D2A50 (12 bytes per compressed frame)
- brotli is supported the same way, it will encapsulate the real brotli stream within an 16 byte frame header
Generic skippable frame definition
| size | value | description |
|---|---|---|
| 4 bytes | 0x184D2A50U | magic for skippable frame |
| 4 bytes | 4 | size of skippable frame |
| 4 bytes | compressed size | size of the following frame (compressed data) |
Brotli frame definition
- the frame header for brotli is defined a bit different:
| size | value | description |
|---|---|---|
| 4 bytes | 0x184D2A50U | magic for skippable frame (like zstd) |
| 4 bytes | 8 | size of skippable frame |
| 4 bytes | compressed size | size of the following frame (compressed data) |
| 2 bytes | 0x5242U | magic for brotli "BR" |
| 2 bytes | uncompressed size | allocation hint for decompressor (64KB * this size) |
Snappy-c frame definition
- the frame header for Snappy-c is defined a bit different:
| size | value | description |
|---|---|---|
| 4 bytes | 0x184D2A50U | magic for skippable frame (like zstd) |
| 4 bytes | 8 | size of skippable frame |
| 4 bytes | compressed size | size of the following frame (compressed data) |
| 2 bytes | 0x5053U | magic for Snappy-c "SP" |
| 2 bytes | uncompressed size | allocation hint for decompressor (64KB * this size) |
LZFSE frame definition
- the frame header for Lzfse is defined a bit different:
| size | value | description |
|---|---|---|
| 4 bytes | 0x184D2A50U | magic for skippable frame (like zstd) |
| 4 bytes | 8 | size of skippable frame |
| 4 bytes | compressed size | size of the following frame (compressed data) |
| 2 bytes | 0x464CU | magic for Lzfse "LF" |
| 2 bytes | uncompressed size | allocation hint for decompressor (64KB * this size) |
Usage of the Testutils
- see programs
Usage of the Library
- see lib
/TR 2020-10-15