Difference between revisions of "YAZ0 (File Format)"
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== Data structure == | == Data structure == | ||
| − | + | == Header == | |
| + | |||
| + | The header of a Yaz0 file is always 16 bytes long. All numeric values stored as [[ big endian]] values. | ||
| + | |||
| + | {| class="wikitable" | ||
| + | |- | ||
| + | ! Offset | ||
| + | ! Type | ||
| + | ! Description | ||
| + | |- | ||
| + | | 0x00 || char[4] || always "Yaz0" | ||
| + | |- | ||
| + | | 0x04 || u32 || size of the umompressed data | ||
| + | |- | ||
| + | | 0x08 || char[16] || always zero (padding) | ||
| + | |} | ||
| + | |||
| + | ;GNU C example: | ||
| + | <pre> | ||
| + | typedef struct yaz0_header_t | ||
| + | { | ||
| + | char magic[4]; // always "Yaz0" | ||
| + | be32_t uncompressed_size; // total size of uncompressed data | ||
| + | char padding[8]; // always 0? | ||
| + | } | ||
| + | __attribute__ ((packed)) yaz0_header_t; | ||
| + | </pre> | ||
| + | |||
=== Data Groups === | === Data Groups === | ||
Revision as of 20:29, 6 April 2011
Yaz0 is a run length encoding (RLE compression) method. In Mario Kart Wii most of the SZS files are Yaz0 compressed U8 files.
Data structure
Header
The header of a Yaz0 file is always 16 bytes long. All numeric values stored as big endian values.
| Offset | Type | Description |
|---|---|---|
| 0x00 | char[4] | always "Yaz0" |
| 0x04 | u32 | size of the umompressed data |
| 0x08 | char[16] | always zero (padding) |
- GNU C example
typedef struct yaz0_header_t
{
char magic[4]; // always "Yaz0"
be32_t uncompressed_size; // total size of uncompressed data
char padding[8]; // always 0?
}
__attribute__ ((packed)) yaz0_header_t;