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Compressed files in Stunt Racer 64 begin with the following header structure:

struct CompressedFileHeader
    /*0x00*/ u32 srcSize; // total source size
    /*0x04*/ u32 dstSize; // total destination size

After the header are contiguous zlib-compressed chunks, each preceded by a subheader containing the source size of the chunk:

struct CompressedChunkHeader
    /*0x00*/ u32 chunkSrcSize;
    /*0x04*/ u8  compressedData[]; // 78 DA ...

The file and chunk headers are aligned to 2 byte boundaries in ROM.

stunt_racer_64/compression.txt · Last modified: 2020/01/27 03:23 by shygoo