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Difference between revisions of "Cine/Specifications"
Found out that Cinematique's compression algorithm is probably Bytekiller 1.3.
m (→.ADL files: consistency change.) |
(Found out that Cinematique's compression algorithm is probably Bytekiller 1.3.) |
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The compression algorithm used by all Delphine's adventure games uses | The compression algorithm used by all Delphine's adventure games uses | ||
sliding window compression (Quite like [http://en.wikipedia.org/wiki/LZ77 LZ77]) | sliding window compression (Quite like [http://en.wikipedia.org/wiki/LZ77 LZ77]) | ||
combined with a fixed non-adaptive [http://en.wikipedia.org/wiki/Entropy_coding entropy coding] scheme | 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]. | |||
This is based on comparing the reverse engineered code in ScummVM with the | |||
[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. | |||
The compressed data is in big endian 32-bit chunks, working backwards from the buffer's end. | The compressed data is in big endian 32-bit chunks, working backwards from the buffer's end. | ||