Re: Audio Control schema changes

[James]

I vote for using 0-100%.

It will give all thats needed to see track position and if you need to
return to a point it will give a accuracy to a few seconds(for an
average track)
Should also cover any device too.

James

On Sat, 2004-02-14 at 15:59, Stuart Booth wrote:
> More items. Edward suggested:
>
> 66
> Class=xAP-Audio.Transport.Info
> This should be periodically transmitted by the unit to indicate
> progress through the current track.
>
> Transport.Info
> {
> Mode=[Play  Pause  Stop]
> Sleep=[Yes  No]
> Power=[On  Off]
> Length="LengthInBytes"
> --- 0 if mode=stop
> Position="PositionInBytes"
> --- 0 if mode=stop
> Index="playlist index"
> --- optional
> Decoder="encoding:bit-rate:sample-rate"
> --- optional and only if mode=play
> }
>
> Optionally this block can be followed by a Track.Info block (defined
> below) the describes the track now playing.
> 99
>
> James asked:
> > xapaudio.transport.info
> > Why bytes and not time? I know you could calculate this from the
bit
> > rate but as bit rate is optional its not guaranteed. esp as audio
seek
> > is in seconds the info should be the same format
>
> Edward replied:
> >With the Exstreamer (running Basic) the time based information is
not
> >easily available or reliable. It just plays a byte stream, the
software
> >get no information about the content. How about progress as a
> >percentage (%) of the way through a track? That should be possible
> >for any implementation.
>
> I'd prefer something that isn't computer related (like bytes), that
> can be consistent across all media/transports, and would also maintain
> consistency with the Audio.Seek command from xAP-Audio.Transport. This
> is impossible in Edward's Exstreamer case though.
>
> So could Length and Position instead be either [hh:]mm:ss or 0-100%,
> depending on what the unit can support?
>
> I specifically went for mm:ss as that can be identified distinctly
> from a standalone number which can therefore be read as a percentage
> (with or without the % sign).
>
> Or maybe a standalone number is the number of seconds, and the
> presence of a % sign indicates the obvious?
>
> What do you reckon?
>
> S