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APPLE II DEVELOPMENT FORUM CONFERENCE LOG
Tuesday, December 8, 1992  10:00 p.m. Eastern Time
Topic:  Operating Systems & General Questions
Forum Leader:  Gary Jacobson (AFL GaryJ)

AFL GaryJ  Welcome to the Apple II Development Forum!
AFL GaryJ  Tonight, our topic is Operating Systems. 
AFL GaryJ  We can discuss whatever operating system questions you may have...
AFL GaryJ  from ProDOS 8, GS/OS, and even DOS 3.3.
AFL GaryJ  And, maybe we can drag out some things about System 6.01?  
AFC DYAJim Well, put me in for a question on sounds
AFC SteveB (Hmm... megots a question, but it's not on topic)
AFC DYAJim (whenever we get to it :-) .. I have some Sound CDev / general rSound
           q's
AFC DYAJim that Dave can probably solve :-)
AFL GaryJ  Sounds?  Sounds?  Gee, that was last week :D
AFC DYAJim (I know.. just my timing! :-( )
AFL GaryJ  We can work that in, I think, Jim :)
AFL GaryJ  Well, ok, does anyone have a question or comment that is *on* topic
           first?
AFC SteveB Well, it has to do with the filetype descriptor files... There's one
AFC SteveB aspect of them that I'm confused aboout... that be's "ranges."  When
AFC SteveB searching filetype descriptors, do I first search for an exact match,
AFC SteveB or a range, or what?
AFC SteveB GA :)
LL AndyW   Nothing that I know about uses the range attributes (not even the
           Finder)..
LL AndyW   And, you'd use the first thing that matches, if it's in the range,
           use it,
LL AndyW   if not, use the first thing you find that does..
LL AndyW   Remember, the LAST thing to look at is the supplied FType file..
AFC SteveB For example, I want my program to build a list of filetypes
           containing
AFC SteveB all the nice textual names next to the matches... causing my engine
AFC SteveB to come up with the filetype names should be easy, but it's building
AFC SteveB the second list of defined auxtypes for a given filetype that's the
           pain.
LL AndyW   It's pretty simple really..
LL AndyW   Load the FType.Apple, then load the rest.  Anything that is a
           duplicate will
LL AndyW   replace anything that came from the FType.Apple file..
Dave Lyons BTW, never hard-code the filenames of filetype descriptor files.  The
           search order is by decreasing
Dave Lyons auxiliary type of the file...FType.Apple just presently happens to be
           the one with auxtype zero.
Dave Lyons My earlier comment was:
Dave Lyons True, the Finder ignores the entire file if there are any ranges in
           it. -- But if you decide to deal
Dave Lyons with ranges anyway, something falling in a range is just as "exact"
           as any other match...a non-range
Dave Lyons overrides it only if you find it first.  ga
LL AndyW   There should also be only one file with aux type of $0000, if there's
           more than
LL AndyW   one, you should yell loudly at the user, and then, not use any of the
           files..
LL AndyW   if you decide to continue anyway..   done..
JWankerl   Is all this documented in the FTD FTN?
LL AndyW   Sure is
AFC SteveB Yup... that's what confused me.
LL AndyW   BTW Steve, I have a dir search routine in C that will return a list
           of all
LL AndyW   FType files, yelling if there's 2 aux $0000 files, and placing the
           $0000 file
LL AndyW   first..
AFC SteveB Ok, so for searching for all the attached auxtypes for... say...
AFC SteveB $BC Generic Load Files, I just do a mother loop looking for fields
AFC SteveB that have $bc in their filetype field and something else in the
           aux... I then
AFC SteveB throw that into my aux list.  Cool.  Fun file format. :)  Andy, if
           you
AFC SteveB want, ship it on over here (or upload it)... nothing like lots o
           sample code :)
LL AndyW   True..  It doesn't sort by aux type any of the other files, but it
           will give
LL AndyW   you the $0000 file first...
AFC DYAJim I want to know how to convert the relpitch and/or sampling rate
           fields of an
AFC DYAJim rSoundSample resource header into a value that I can stuff in a
           parmblock to
AFC DYAJim pass to FFStartSound to play the sound.  This seems to be an
           incredibly way
AFC DYAJim too complex procedure.  Preferably I'd like to do it without the use
           of a
AFC DYAJim 3k lookup table (as in the Sound CDev if I didn't glance over it too
           quick.)
AFC DYAJim I want something short and sweet :-)  (and who made us go thru all
           this nasty
AFC DYAJim work???! :)
Matt DTS   The math involves natural logs and such, so a lookup table is
           significantly faster than trying
Matt DTS   to do it yourself.  However, if you want, I had to put all this
           together about 3 months ago when it
Matt DTS   came up at work and in A2Pro all at the same time (ACK!), so I should
           have it on my hard drive if I
Matt DTS   can find it.  It's scheduled for a future revision to HCGS TN #3.  Do
           you want it in the conference,
Matt DTS   or should I post it somewhere?
AFC DYAJim If you could email it I'd be greatful (unless you want to u/l it to
           newfiles)
Matt DTS   Nope -- if I'm going to get it out, it's going to be public (message
           or conference).  Just pick which.
AFL GaryJ  I'd like to see it posted publicly someplace... if not here, an
           upload or in one of the
AFL GaryJ  folders (where ever it would fit the best)
AFC DYAJim Oh. it'd probably be easier to save and deal with later if you posted
           it
AFC DYAJim (Why can't they just have another word in the header with this value
           all
AFC DYAJim precalculated, I wonder)
James S WI So is there any good reason for the pain in the *** format?
Dave Lyons "Who inflicted this mess upon us"--not me!  It was already invented
           before My Time.  :-)
Dave Lyons ga
LL AndyW   They want to make things hard for YOU Jim!!  :)
AFC DYAJim (maybe I'll just rip the routine out of the Sound Cdev ;-) shouldn't
           take more
AFC DYAJim than 10 min :-)  I guess T2 will probably grow by 3k because of
           this..
AFC SteveB You could always find the sound CP in memory and use it's lookup
           table... nice
AFC SteveB way to break T2 in future SSW releases, tho :)
Dave Lyons (Please don't!  But if you pray, maybe future system software will
           give you access to the Sound
Dave Lyons CP's copy of that table.  Or maybe even if you don't pray.)  ga
AFL GaryJ  Is that a hint?  I hope so.
AFC DYAJim Well I guess then for the current version of T2, I'll hardcode the
           table,
AFC DYAJim and remove it if there are any upgrades post-6.0.1.
LL AndyW   Does anyone here have an interest in a program to add GSBug labels to
           programs
LL AndyW   such as C or Pascal?  (Since no one I know of has a linker that will
           add them).
LL AndyW   I have written a program that will do this.  It will read OBJ files,
           add
LL AndyW   GSBug labels to only code files, and only to the START label..
JWankerl   You're gunna give me a copy, right?  You're not just teasing me,
           right?
LL AndyW   It will also al