add CHD support.

[pcsx_rearmed.git] / deps / lzma-16.04 / DOC / Methods.txt

7-Zip method IDs for 7z and xz archives\r
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Version: 16.03\r
Date: 2016-09-27\r
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Each compression or crypto method in 7z is associated with unique binary value (ID).\r
The length of ID in bytes is arbitrary but it can not exceed 63 bits (8 bytes).\r
\r
xz and 7z formats use same ID map.\r
\r
If you want to add some new ID, you have two ways:\r
  1) Write request for allocating IDs to 7-Zip developers.\r
  2) Generate 8-bytes ID:\r
\r
    3F ZZ ZZ ZZ ZZ ZZ MM MM \r
\r
    3F              - Prefix for random IDs (1 byte)\r
    ZZ ZZ ZZ ZZ ZZ  - Developer ID (5 bytes). Use real random bytes. \r
                      \r
    MM MM           - Method ID (2 bytes)\r
\r
    You can notify 7-Zip developers about your Developer ID / Method ID.\r
\r
    Note: Use new ID, if old codec can not decode data encoded with new version.\r
\r
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List of defined IDs\r
-------------------\r
      \r
00 - Copy\r
\r
03 - Delta\r
04 - BCJ (x86)\r
05 - PPC (big-endian)\r
06 - IA64\r
07 - ARM (little-endian)\r
08 - ARMT (little-endian)\r
09 - SPARC\r
\r
21 - LZMA2\r
          \r
02.. - Common\r
   03 [Swap]\r
      - 2 Swap2\r
      - 4 Swap4\r
\r
03.. - 7z\r
   01 - \r
      01 - LZMA\r
  \r
   03 - [Branch Codecs]\r
      01 - [x86 Codecs]\r
         03  - BCJ\r
         1B  - BCJ2 (4 packed streams)\r
      02 - \r
         05 - PPC (big-endian)\r
      03 - \r
         01 - Alpha\r
      04 - \r
         01 - IA64\r
      05 - \r
         01 - ARM (little-endian)\r
      06 - \r
         05 - M68 (big-endian)\r
      07 - \r
         01 - ARMT (little-endian)\r
      08 - \r
         05 - SPARC\r
\r
   04 - \r
      01 - PPMD\r
\r
   7F -\r
      01 - experimental method.\r
\r
\r
04.. - Misc codecs\r
\r
   00 - Reserved\r
\r
   01 - [Zip]\r
      00 - Copy (not used. Use {00} instead)\r
      01 - Shrink\r
      06 - Implode\r
      08 - Deflate\r
      09 - Deflate64\r
      0A - Imploding\r
      0C - BZip2 (not used. Use {040202} instead)\r
      0E - LZMA (LZMA-zip)\r
      5F - xz\r
      60 - Jpeg\r
      61 - WavPack\r
      62 - PPMd (PPMd-zip)\r
      63 - wzAES\r
\r
   02 - \r
      02 - BZip2\r
\r
   03 - [Rar]\r
      01 - Rar1\r
      02 - Rar2\r
      03 - Rar3\r
      05 - Rar5\r
\r
   04 - [Arj]\r
      01 - Arj(1,2,3)\r
      02 - Arj4\r
\r
   05 - [Z]\r
\r
   06 - [Lzh]\r
\r
   07 - Reserved for 7z\r
\r
   08 - [Cab]\r
\r
   09 - [NSIS]\r
      01 - DeflateNSIS\r
      02 - BZip2NSIS\r
\r
   F7 - External codecs (that are not included to 7-Zip)\r
\r
      0x xx - reserved\r
      10 xx - reserved (LZHAM)\r
      11 xx - reserved (Zstd)\r
\r
\r
06.. - Crypto \r
\r
   F0 - Ciphers without hashing algo\r
\r
      01 - [AES]\r
         0x - AES-128\r
         4x - AES-192\r
         8x - AES-256\r
         Cx - AES\r
\r
         x0 - ECB\r
         x1 - CBC\r
         x2 - CFB\r
         x3 - OFB\r
         x4 - CTR\r
\r
   F1 - Combine Ciphers\r
\r
      01 - [Zip]\r
         01 - ZipCrypto (Main Zip crypto algo)\r
\r
      03 - [RAR]\r
         02 - \r
         03 - Rar29AES (AES-128 + modified SHA-1)\r
\r
      07 - [7z]\r
         01 - 7zAES (AES-256 + SHA-256)\r
\r
\r
---\r
End of document\r