[Gridflow-dev] [PD-dev] proposal: postdsp callbacks

Mathieu Bouchard matju at artengine.ca
Mon Jul 18 22:34:35 EDT 2005

On Sun, 17 Jul 2005, ClaudiusMaximus wrote:

> The only problem is that I have to set the audio buffer size very high
> (370ms) to avoid clicks when each frame is generated.  I don't know if
> using [any] and [delay] to stagger the computation through time would
> work - ie, not crash ;) - I guess I'll have to try it.

It will crash because, in GridFlow, a grid message expires just after the
sending of the message returns. At the moment it expires, the transmission
starts. The transmission ends before the sender of the grid message
returns. Whenever a t_clock is triggered (by [delay] or [metro] or
whatever), it's waaaay too late.

The streaming in GridFlow was not designed to allow smaller latencies. It
was designed only to make it easy for a chain of objects to develop some
kind of cache affinity. That was in the original design (April 2001 or
so). Maybe it could change in the near future, but then, it wouldn't 
magically solve everything.

Individual object classes may be guilty of further problems. E.g. all
image decoders supported by [#in] will decode all of the frame at once and
all of that in the main thread too (GF doesn't use threads).

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