Add Audio support on OpenBSD

[lcheylus]

Audio for Sokol (include sokol_audio.h) is not supported on OpenBSD OS.

On FreeBSD OS, lib ALSA (lib asound) is used to support Audio (see PR #1055). On OpenBSD, ALSA lib is not available via ports (but may be supported).

On OpenBSD, sndio framework is available to handle audio inputs/outputs => see https://sndio.org/

[floooh]

Eventually I want to move the Linux audio backend to something higher level (also ALSA is a shitty API). Do you know if there are any audio streaming APIs support across Linux and the BSDs? In this thread JACK came up as an alternative to ALSA: #400, do you know if that's supported across the BSDs?

[lcheylus]

I don't know if JACK is supported across all BSDs. According to GH repository, there is some code to support FreeBSD => https://github.com/jackaudio/jack2/tree/develop/freebsd

Maybe PulseAudio is a better alternative to replace ALSA for Sokol/audio => https://www.freedesktop.org/wiki/Software/PulseAudio/

[any1here]

Wouldn't PipeWire be the better alternative now instead of PulseAudio, since most distros have moved to it as the default?
https://github.com/mikeroyal/PipeWire-Guide has some good information.

[floooh]

PipeWire be the better alternative now instead of PulseAudio

No idea tbh, audio is such a frigging mess on Linux that it's pointless trying to keep up ;) Ideally it would be any audio API which allows to setup a stereo stream with as little code as possible and which is preinstalled and "just works" on any Linux desktop setup.