[gmpi] Re: Revised Topic 7.1: Audio I/O
- From: Steve Harris <S.W.Harris@xxxxxxxxxxxxxxx>
- To: gmpi@xxxxxxxxxxxxx
- Date: Fri, 6 Jun 2003 12:23:31 +0100
On Fri, Jun 06, 2003 at 07:15:57 -0400, Angus F. Hewlett wrote:
> > Yes, but it doesn't allow connections to change diring hte lifetime of the
> > plugin, so I think its not an option.
>
> Not necessarily a problem.. again depends on a good instantiation
> mechanism. Assuming we have to pause the graph anyway to change the
> connection setup, it's not a big step further to
> save-uninstantiate-instantiate-restore a single plugin instance.
Its not always neccesary to pause the graph to make connection changes, if
the buffers are simple float *'s it can be done between graph execution
cycles very cheaply. There are many LADSPA hosts that do this.
save-uninstantiate-instantiate-restore OTOH can be quite an expensive
operation, eg. if the plugin has to build tables according to the sample
rate.
- Steve
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