Java hash source updated

[rednoah]

Hey,

I went a little bit overboard when allowing for arbitrary hash length, so I made a few adjustments.

The hash is now calculated via longs and not (immutable) BigIntegers making the whole thing roughly 200x faster.

Also I'd like to note, that a third small test file would be nice, 'cause I don't really know what to do if the size is smaller than 64k and not a multiple of 8.

[oss]

Thanks for update! Also I never saw movie, where are needed subtitles smaller than 64kb, do you ?

[eduo]

Rednoah: The hash doesn't work in videos that small. If you try to hash a file that small (which amounts to what, five seconds of ultracompressed video?) you should abort the operation.

OpenSubtitles has no hash for files that small anyway.

[rednoah]

I was just wondering how to handle small files cause my algorithm and the C# one come up with a different results.

But I guess subs for 5s movies don't really make sense so this will never be a problem so I'll leave it at that.

[eduo]

Rednoah: In reality you should never try getting the video hash of anything smaller than 129K.

What I've done is to set-up a double function, so I use the same "Makehash" for video and subtitles (which have a simpler MD5 hash). That way I can recycle a lot of routines and calls.

[rednoah]

Hi,

I just added a stream based implementation of the hash function to the wiki. It might be useful if you only have an InputStream to work with.

lg
red

[oss]

thanks rednoah.