Hi,
On Wed, 11 Apr 2012, S. Massy wrote:
> - Implementing stop/replace_effect_logic/start:
> It no longer crashes but is slow even for one effect, and can take
> upwards of ten seconds to bypass or restore a whole chain of effects.
> A random amount of audio gets chopped off.
yes, I'm afraid this is expected. The stop/start procedure is slow (a lot
of work is done before and after stopping).
> - Implementing stop-sync/replace_effect_logic/start:
> No crash, bypassing one effect (IOW cop-remove/cop-add) is pretty
> instantaneous, but bypassing several can take up to two seconds, which
> is long but much less than the previous instance. When bypassing one
> effect, there seems to be no obvious audio lost, but a random amount
> of audio gets chopped off when bypassing several effects in one go.
Yes, this will help as you can reduce number of stop-starts (do many
changes in one go).
> - Current method stop/sleep/replace_effect_logic/sleep/start with
> ecasound 2.8.1:
> We sleep a total of 0.3 seconds, 0.2 between stopping and replacing
> the effects. No audio lost, no significant delay, no matter how many
> effects are being replaced.
But I fear this is just not reliable. The 0.3/0.2 values depend on setup
complexity, disk i/o speed (compared to amount of bandwidth needed by the
setup), CPU speed, system load. So it'll be impossible to pick values that
are reliable for everybody. :(
In the end, I think the sane way forward is for me to add cop-bypass to
the next ecasound version. Considering the overall effort, adding
cop-bypass is a lot less work than doing complicated optimizations to the
stop-start logic.
------------------------------------------------------------------------------
For Developers, A Lot Can Happen In A Second.
Boundary is the first to Know...and Tell You.
Monitor Your Applications in Ultra-Fine Resolution. Try it FREE!
http://p.sf.net/sfu/Boundary-d2dvs2
_______________________________________________
Ecasound-list mailing list
Ecasound-list@email-addr-hidden
https://lists.sourceforge.net/lists/listinfo/ecasound-list
Received on Thu Apr 12 20:15:01 2012
This archive was generated by hypermail 2.1.8 : Thu Apr 12 2012 - 20:15:01 EEST