MREA (Metroid Prime 2): Difference between revisions
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=== Compressed | === Compressed Blocks === | ||
The MREA format contains compressed blocks that can each contain a number of regular file sections within them. These blocks are compressed using segmented LZO1X-999 | The MREA format contains compressed blocks that can each contain a number of regular file sections within them. These blocks are compressed using segmented LZO1X-999. Compressed blocks are padded to 32 bytes, but their padding is located at the beginning of the block rather than the end, so it's required to account for the padding before you start decompressing. The compressed data is segmented, which means there's multiple segments of data that are compressed/decompressed separately. Each segment starts with a 16-bit size value. The size value is signed; a negative value indicates the segment is not compressed (this is done when compressing a segment doesn't reduce its size). Each segment is 0x4000 bytes large when decompressed (except the last one). | ||
Compressed | Compressed blocks are defined after the main header. After reading them, pad to 32 bytes before the main file data starts. | ||
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| colspan=2 {{unknown| | | colspan=2 {{unknown|Block definition end}} | ||
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