Re: [fluid-dev] libinstpatch integration?

[David Henningsson]

On 2014-06-07 01:13, Micah Fitch wrote:
> So anyhow, I'm curious about this.  Right now I can't even have multiple
> instances of a 300 MB soundfont without really taking up lots of
> unnecessary memory.  It'd be nice to change that.

Actually, this has recently been fixed in FluidSynth, there hasn't yet 
been a release that has this feature though. I e, if you have two 
different FluidSynth instances that both load the same soundfont, they 
will share the soundfont memory.

> P.S. Here's a totally off the wall idea...  to make an LV2 plugin based
> on Swami.  That's kind of intriguing to me for some reason!  But would
> probably be a good amount of work.

FWIW, I made some draft/alpha code for interfacing LV2 and FluidSynth a 
while ago, but I haven't got that far on it yet, the main reason being 
lack of time.

I'm not sure exactly how libInstPatch works, but I've been thinking that 
maybe one could just mmap the entire soundfont instead of loading it 
into RAM. Or possibly load the metadata into RAM, but not the sample data.
With today's modern SSD drives with low seek time, it should perhaps be 
possible to load things directly from disk while keeping reasonably low 
latency. That's just an untested idea though.

// David