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update Methods-Extern.txt

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This commit is contained in:
Tino Reichardt
2016-12-28 18:01:12 +01:00
parent cc6c9f3554
commit f38508d0a5
1 changed files with 29 additions and 7 deletions
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36
DOC/Methods-Extern.txt
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@@ -11,10 +11,10 @@ Overview of defined ID ranges
-----------------------------
F7 0x xx - reserved
F7 10 xx - LZHAM
F7 11 01 - ZStandard
F7 11 04 - LZ4
F7 11 05 - LZ5
F7 10 xx - LZHAM by Rich Geldreich
F7 11 01 - ZStandard by Yann Collet, Tino Reichardt
F7 11 04 - LZ4 by Yann Collet, Tino Reichardt
F7 11 05 - LZ5 by Przemyslaw Skibinski, Tino Reichardt
@@ -61,6 +61,13 @@ Zstandard library is provided as open source software using a BSD license.
Byte _ver_minor; // currently 1
Byte _level; // currently 1..22
Byte _reserved[2];
- this header holds some information about the version, which was
used for creating that 7-Zip container data
- _ver_major should contain the major release of zstd
- _ver_minor should contain the major release of zstd
- _level should contain the level, the data is packed with
- the other two bytes should be set to zero currently and are
reserved for future use
Algorithm author: Yann Collet
Algorithm Homepage: https://facebook.github.io/zstd/
@@ -73,7 +80,7 @@ Source Code: https://github.com/mcmilk/7-Zip-zstd
Modes:
- threading is supported through skippable frame id 0x184D2A50U
- all levels are supported (1..22)
- future version of zstd will support multi threading out of the box
- future versions of zstd will support multithreading out of the box
-> this new format is fully compatible with the one within this codec
- the codec is used as archiv handler also, see ZstdHandler.cpp
- this handler is does not use any additional headers, it supports the plain
@@ -106,6 +113,14 @@ LZ4 library is provided as open source software using a BSD license.
Byte _ver_minor; // currently 7
Byte _level; // 1..16
Byte _reserved[2];
- this header holds some information about the version, which was
used for creating that 7-Zip container data
- _ver_major should contain the major release of LZ4
- _ver_minor should contain the major release of LZ4
- _level should contain the level, the data is packed with
- the other two bytes should be set to zero currently and are
reserved for future use
Algorithm author: Yann Collet
Algorithm Homepage: https://lz4.github.io/lz4/
@@ -144,6 +159,13 @@ LZ5 library is provided as open source software using a BSD license.
Byte _ver_minor; // currently 5
Byte _level; // 1..16
Byte _reserved[2];
- this header holds some information about the version, which was
used for creating that 7-Zip container data
- _ver_major should contain the major release of LZ5
- _ver_minor should contain the major release of LZ5
- _level should contain the level, the data is packed with
- the other two bytes should be set to zero currently and are
reserved for future use
Algorithm author: Przemyslaw Skibinski
Algorithm Homepage: https://github.com/inikep/lz5
@@ -159,9 +181,9 @@ Modes:
- the codec is used as archiv handler also, see Lz5Handler.cpp
- this handler is does not use any additional headers, it supports the plain
lz5 v1.5 format
- future formats of this algorithm will not be compatible with current release,
- future formats of this algorithm may not be compatible with current release,
this codec is very experimental
- multiple ID's are required for this codec
- one ID should be okay for this codec
Versions:
The 7-Zip codec will be kept in sync with the current releases of LZ5.