[gmpi] Re: Reqs 3.8 Events - abs. vs rel. timestamps
- From: David Olofson <david@xxxxxxxxxxx>
- To: gmpi@xxxxxxxxxxxxx
- Date: Wed, 24 Dec 2003 01:54:20 +0100
On Wednesday 24 December 2003 00.09, Tim Hockin wrote:
[...]
> Based on this, I'm inclined to believe we have come to decide that
> event timestamps are 32 bit offsets from the start of the buffer.
There is this "wrapping timestamp" alternative as well, but it's a bit
messier than offsets from the start of the buffer, and doesn't really
buy anything on the API level. Well, except in a modular synth with
lots of "small block" subnets for low latency feedback. That is,
buffer splitting, but that's still doable - and a bit out of scope
for GMPI, I think.
So: "32 bit offsets from the start of the buffer."
I guess 16 bit would do as well, but that's pointless (unless we need
the saved bits for something) and slightly restrictive WRT buffer
size for off-line and heavily buffered rendering. Then again, large
buffers can *really* hurt (cache thrashing), so it actually makes
sense to use relatively small buffers anyway... Oh well.
//David Olofson - Programmer, Composer, Open Source Advocate
.- Audiality -----------------------------------------------.
| Free/Open Source audio engine for games and multimedia. |
| MIDI, modular synthesis, real time effects, scripting,... |
`-----------------------------------> http://audiality.org -'
--- http://olofson.net --- http://www.reologica.se ---
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