On Sun, 12 Aug 2007, Rohan Drape wrote:
> Henning Thielemann <[EMAIL PROTECTED]> writes:
> > We need
> > encodeOSCZeroBase :: OSC -> B.ByteString
> > which converts a message by converting Double to Integer
> > and does the message encoding (which is currently done by encodeOSC)
> > delayOSC :: Double -> OSC -> OSC
> > which shifts a message in time (i.e. changes time base)
> > encodeOSC :: Double -> OSC -> B.ByteString
> > calls delayOSC and encodeOSCZeroBase
> >
> > encodeOSCZeroBase can be used for non-realtime synthesis and encodeOSC for
> > realtime use.
>
> i'm not sure about this. encodeOSC uses the conventional
> 'unix/utc' epoch. encodeOSCZeroBase would not be 'zero'
> it would be the rather more obscure 'ntp epoch'.
But I indeed mean 'zero based'. Since scsynth doesn't know about Haskell's
OSC type we can use any time base, and I think time base 0 is the most
natural one. The actual time base needed for scsynth is added when
encoding the message.
Today we write something like this
do now <- utc
let msg = Bundle (now+effectStartTime) effect
send fd (encodeOSC msg)
With my proposed change we would write
do let msg = Bundle effectStartTime effect
now <- utc
send fd (encodeOSC now msg)
This has also the advantage that generation of scores does not depend on a
IO generated value (namely 'now').
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