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Forums > C64 Coding > HVSC SID Playtime Database ?
2017-06-26 22:26

Registered: Sep 2003
Posts: 53
HVSC SID Playtime Database ?

I am currently coding something Sid related Tool for PC and was wondering if there exists a Database (csv,xml,or whatever) that contains the default Sid Subtune Playtimes.

At the Moment i use Siddiag to recieve the Sidtimes, but this very annoying and time intense. If there would be a DB-File where i could search with the MD5 of the Sid that would speed up Time detecting a lot.

Anyone knows about the existance of this or something simmilar ?
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2017-06-28 09:08

Registered: Jan 2003
Posts: 345
Again, in case the message didn't get through yet:
The MD5 in Songlengths.txt is based on the .sid file contents, not on the playback result.
2017-06-28 13:08

Registered: Sep 2003
Posts: 53
Sorry to disappoint you.But You can Check yourself. They are Not

atleast not with Files i tested. But will to be 1000% sure i will test again this evening
2017-06-28 15:04

Registered: Feb 2003
Posts: 167
The MD5 hashes in the Songlengths.txt file are based on the content but not on the full content. You need to know which fields in the SID header needs to be included in the MD5 calculation and how to handle them and in which order, in order to get the right MD5 hash.

The MD5 calculation was done in the time that we had to compare a lot of SIDs against the HVSC collection to filter out double entries. There was a need that SIDs with a different title, author or released field would produce the same hash. The same MD5 calculation was used for the Songlengths database since the tooling was already there.

For a lot of people the calculation is confusing and unclear. Having the MD5 hash based on the full content makes more sense and we're considering it for changing it since there is no need for having this kind of MD5 hash for the songlengths database. Changing it means also that current applications and tools need to be updated.
2017-06-28 16:00

Registered: Dec 2001
Posts: 8442
i miss engraved64 in this thread
2017-06-29 17:14

Registered: Jan 2005
Posts: 300
Quoting Groepaz
i miss engraved64 in this thread

lol, that would seriously derail this thread.
2017-06-29 17:25

Registered: Dec 2001
Posts: 8442
this is not usual method
2017-12-23 12:54

Registered: Feb 2003
Posts: 167
As of HVSC#68, we have 3 different formats for the song lengths:

- Song length database (old format)
- Song length database (new format)
- SSL files for players that run on C64 hardware

Have a read here for details: http://hvsc.de/download/C64Music/DOCUMENTS/Songlengths.faq
2017-12-24 15:05

Registered: Jan 2005
Posts: 300
There's something a bit unclear in that document:

Each song length is of format:


where mm and ss are numbers and mm never starts with a 0.

I assume this is supposed to mean that mm should not have leading zeros, but the way it is worded now means you cannot have song lengths of under a minute.
2017-12-24 20:04

Registered: Feb 2003
Posts: 167
You're right. It should never have a leading zero. Thanks for noticing. I will update the document in the next update.
2017-12-24 22:12

Registered: Jan 2005
Posts: 300
Cool. Pedantry has it uses :)
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