[gmpi] Re: Topic 6: Time representation
- From: "Angus F. Hewlett" <amulet@xxxxxxxxxxxxx>
- To: gmpi@xxxxxxxxxxxxx
- Date: Thu, 1 May 2003 11:57:24 -0400 (EDT)
On Thu, 1 May 2003 RonKuper@xxxxxxxxxxxx wrote:
> Proposal 1: A plugin's "process" routine is also provided with a MUSTIME
> value that provides the current musical stream time for the frame.
<Pedant> Or rather, for the start of the frame. Musical time is of course
elastic and may vary during the frame.</Pedant>
> MUSTIME
> is designed (cleverly<g>) to encode tempo information, so some "MUSTIMEs per
> ABSTIME" (in this frame) can be computed. Tempo and meter changes are
> delivered to the plugin "just-in-time", as separate events.
If the plugin is provided with tempo and meter changes, it should be able
to compute musical time for itself, we are really supplying the
per-frame MUSTIMEs only for convenience. However, we also need to be able
to deliver musical time discontinuities (MUSTIMEs) just-in-time as events,
as in the case where the sequencer loops back midway through the frame.
Other than that, this proposal works for me.
Regards,
Angus.
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