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Nice article.
You use a function called fs_FileIO. I am guessing this just returns the FILE* for the opened file, if it has one. Am I right?

ops! i forgot that :P

Yes, it returns FILE pointer.

at filesystem.c:

that was helpful. thanks.

After the release of Build 2897 I tried and used the Ogg Vorbis feature.
It's nice to have Ogg Vorbis support, but it would be nicer to be able to put ogg files inside your Pak data file (I know oggs are already compressed...)

That's why I implemented this feature. The trick is simple:
we must use ov_open_callbacks() instead of ov_open() to open an ogg file, and we must provide callbacks substitutes for at least the fread() and fclose() functions (fseek() and ftell() are optional). This way the ogg library can read from any kind of source, even if it is not seekable.

It is easy to write a wrapper for fs_ReadBytes() and fs_Close() (unfortunatetly we don't have a sort of fs_Seek(), so we must consider our stream unseekable)

We don't even need to expose the FILE* pointer with fs_GetFileIO!

The only drawback is, since the stream is not seekable, we can't simply open the file, test if it is an ogg file, and if it fails read it as a standard wav file.

Instead we must open the file, try and read as a standard wav file, if it fails close it and reopen, try and read as an ogg file..

I tried it with CCC and it works (I changed the track1.wav with some other ogg file inside the game.pak).

If anybody is interested to test it I can send the modified snd_wave.c file (and you can safely delete the fs_GetFileIO() from filesystem.c)

I am currently working on audio programming in Cipher, and am looking to include OGG support. I found the OGG tutorial here, but however am having problems locating the correct header and include files.

I have downloaded the Ogg Vorbis Win32 SDK (1.0.1), and I could not locate the correct .lib files that are mentioned in the tutorial. I also downloaded the libogg source (1.0.1), and libvorbis source (1.0.1). However parts of these seem to be corrupted.

Could someone please point me in the right direction concerning where I can download the files required for the tutorial.

Thanks

Ummm... as far as I know (although we havent gotten there yet) the latest cipher already supports ogg.
just be sure the Cipher Core includes the vorbis directory in it's includes.

Unfortunatly the code provided here does not work with the cipher PAK file system. I have sent rik my code which integrates nicely into the file system but it did not make it into any cipher release yet.

could you post it to the user contribution section philk? thank you

Just submitted my code. Allow up to 24 hours to appear.

Edit: I was wrong about lastest cipher code :/
Edited 14th March, 2005 14:11

@seryu: Thanks for your contribution. But I can only repeat what I already stated: Your code found in the latest source2897.zip does NOT comply with the cipher PAK file system. You introduce some awkward FILE structure and read directly from the disk instead of using ciphers file routines. To make it clear: With your solution one can never load or stream sounds from within a PAK file. My code integrates fully into Cipher and is based on your basic work.

Oh, sorry, I really think Rikh updated it on the last source.

Since im working with custom cipher version, I looked at sourced & I think this change was rikh, not mine sourcecode.

Well, when you changes will get upload on User Contribution All of us could use it :-) and I hope rikh will add it to cipher.

Regards.

@seryu: Seems to many source code versions are floating around here :) I uploaded it it already on saturday. We will see when it appears.

code is up in the user contributions section