[Openal] OpenAL Soft 1.5.304 is out!

[Chris Robinson]

Was hoping to have it out a few days ago, but I ended up doing a bit more work 
on it than I expected.

http://kcat.strangesoft.net/openal.html

This has fixes for the doppler shift that slipped into 1.4, better EFX 
compliance, less memory use in the mixer (about 3MB less), a smaller output 
buffer for less latency (if anyone has stuttering or skipping problems due to 
it, please let me know!), a pkg-config file, the ability to override the lib 
dir using LIB_INSTALL_DIR (eg. to use 'lib64' on x86-64 systems), and more.

Assuming all goes well and CPU use doesn't become much of an issue, expect to 
see the high-pass and band-pass filters implemented for the next version. I 
would've done it before the release, but I figured the changes were already 
enough and I didn't want to increase the risk of introducing CPU usage 
problems.

Also, if there's a portable, LGPL-compatible lib that can apply effects in 
real-time (reverb, chorus, echo, etc), I may off-load the effects processing 
to that instead of trying to (poorly) hand-code them. I had a look at 
freeverb for doing the reverb effect with, but it seems its expected 
parameters don't match up with what EFX uses. I'll continue looking to see 
what I can do, but does anyone have any suggestions?

Thanks for looking! Comments and critique welcome..
- Chris