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Things to do for the matcd driver 4-Jul-95
1. Someone wants to switch all drivers from disklabel and
its assorted mechanisms over to disk slicing and its mechanisms,
but I was unable to find any useful documentation on how to
implement the changes for a read-only, single-partition,
removable (ie, partition can change size) device.
So this will have to wait until after 2.1.
2. Support for reading R-W subcodes while playing audio. This would be
useful if you have any CD+G or CD+MIDI discs, but the demand for this
is pretty low, unless you like Karaoke. Someone will also have to
write a CD+G viewer for X. The code for the driver to add this is
pretty minor but there aren't any precedents on how to handle the
data transfer to the application.
3. Support for reading the ISBN and UPC labels. The ioctl structures
for these appear to be defined but no other driver seems to do this.
4. Multi-session support. There are two forms of this; what
Philips defined and what Kodak uses. This will be quite
complicated and will probably require changes in the filesystem
layer. The drive support for Kodak multi-session is known to work.
5. Multiple data tracks. My vision here was to add an ioctl
that caused a track offset to be inserted into block requests,
effectively shifting the base to the specified track. Very
easy to add but not a big deal since I have only two discs
in my collection that have multiple data tracks and I mastered
one of them.
6. A curses-based CD-Player app (ie, not X). I will probably do this
mainly for its value as a debugging tool. It was pretty annoying
not finding a single application that actually issued all the
defined ioctls, let alone any new ones.
If you feel the urge to work on one or more of these remaining items,
please contact the author first at bsdmail@nemesis.lonestar.org
to make sure the work hasn't already been done or started.
Frank Durda IV
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