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Difference between revisions of "Cine/Specifications"
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Added more detail to chapter title "Compression format" with "Compression format (Bytekiller 1.3)".
(Found out that Cinematique's compression algorithm is probably Bytekiller 1.3.) |
(Added more detail to chapter title "Compression format" with "Compression format (Bytekiller 1.3)".) |
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</pre> | </pre> | ||
===Compression format=== | ===Compression format (Bytekiller 1.3) === | ||
The compression algorithm used by all Delphine's adventure games uses | The compression algorithm used by all Delphine's adventure games uses | ||
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combined with a fixed non-adaptive [http://en.wikipedia.org/wiki/Entropy_coding entropy coding] | combined with a fixed non-adaptive [http://en.wikipedia.org/wiki/Entropy_coding entropy coding] | ||
scheme. It seems that the algorithm is [http://www.pouet.net/prod.php?which=47994 Bytekiller 1.3]. | scheme. It seems that the algorithm is [http://www.pouet.net/prod.php?which=47994 Bytekiller 1.3]. | ||
This is based on comparing the reverse engineered | This is based on comparing the reverse engineered | ||
[https://github.com/scummvm/scummvm/blob/branch-2-0-0/engines/cine/unpack.cpp#L92 decompression routine] | |||
in ScummVM with the | |||
[https://github.com/aperture-software/colditz-escape/blob/v1.2/low-level.c#L150 uncompress]-function | [https://github.com/aperture-software/colditz-escape/blob/v1.2/low-level.c#L150 uncompress]-function | ||
from [https://github.com/aperture-software/colditz-escape Colditz Escape]'s source code. | from [https://github.com/aperture-software/colditz-escape Colditz Escape]'s source code. | ||