[gmpi] Re: New Reqs 3.8 - Events
- From: "Jeff McClintock" <jeffmcc@xxxxxxxxxx>
- To: <gmpi@xxxxxxxxxxxxx>
- Date: Sat, 20 Dec 2003 07:58:38 +1300
> No matter what, you always send the absolute timestamp at the start of the
> process routine; call that the 'now' value.
small optimisation: The absolute timestamp is not always needed, often the
relative ones are all you need. So in SynthEdit for example, to save CPU,
the absolute timestamp is not passed to the plugin. The plugin can ask the
host for it if needed though.
Best Regards,
Jeff
----- Original Message -----
From: "Tim Hockin" <thockin@xxxxxxxxxx>
To: <gmpi@xxxxxxxxxxxxx>
Sent: Friday, December 19, 2003 3:46 PM
Subject: [gmpi] Re: New Reqs 3.8 - Events
> On Thu, Dec 18, 2003 at 11:55:11PM -0500, Michael Gogins wrote:
> > Then I don't understand the distinction between absolute and relative
> > timestamps. It seems to me that what I have described is absolute
> > timestamps.
>
> OK, let me explain it as I understand it:
>
> No matter what, you always send the absolute timestamp at the start of the
> process routine; call that the 'now' value.
>
> Absolute timestamps put a 64-bit value on each event which represents the
> absolute time of the event on the same timeline as 'now'. An event which
is
> due 5 samples into the buffer has a timestamp of (now + 5).
>
> Relative timestamps put a 32-bit value on each event which represents the
> offset of the event relative to 'now'. An event which is due 5 sampled
into
> the buffer has a timestamp of 5.
>
> The difference is mostly a usage pattern.
>
>
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