I'm working on a C library that reads tag information from music files. I've already got ID3v2 taken care of, but I can't figure out how Ogg files are structured.
I opened a .ogg file in a hexeditor and I could find the tag data because that was all human readable. But everything from the beginning of the file to the tag data looked like garbage. How is this data encoded?
I don't need any help in the actual code, I just need help visualizing what a Ogg header looks like and what encoding it uses so I that I can read it. I'd like to use a non-hacky approach to reading Ogg files.
I've been looking at the Flac format, which has been helpful.
The Flac file I'm looking at has about 350 bytes between the "fLac" identifier and the human readable Comments section, and none of it is human readable in my hex editor, so I'm sure there has to be something important in there.
I'm using Linux, and I have no intention of porting to Windows or OS X. So if I need to use a glibc only function to convert the encoding, I'm fine with that.