[linux-audio-dev] Fwd: Opinions on running VST or DirectX plugins

[Jesse Chappell]

<chrismorgan at rcn.com> wrote on Wed, 23-Oct-2002:

 > Just so people don't think the code has fallen off of the face of the planet ;-)
 > 
 > Currently I'm working on two things with the wine jack driver ,
 > one of which needs to be complete before I submit the patch, the 
 > other can wait until some ongoing jack support is complete.
 > 
 > 1. The driver currently closes and opens jack connections synchronously 
 > with wodOpen and wodClose.  The problem is that jack doesn't actually close 
 > the clients right away, sometimes it can take many seconds for this to occur. 
 > Apparently this is a known jack bug but I'm also wondering if this is a problem
 > in wines pthread implementation of conditions(there is no support for them right now).
 > Either way I've implemented a workaround that basically consists of opening jack 
 > connections and marking them as in-use or available as apps open or close audio devices. 
 > This behavior can be enabled/disabled via a define in the driver.  This isn't complete
 > yet but it should be soon and would prevent the lockups and delays that currently 
 > make things a pain.

If you do a jack_deactivate() just before a jack_close(), it
pretty much eliminates the delay you're seeing.  Jack should
probably do this itself in the implementation of jack_close()....

jlc