Add cpal Sink to librespot

[sashahilton00]

Currently, discussion to get Windows support is under way. Hopefully rust-mdns will be updated to work with Windows soon (#140), at which point, to ease running on Windows (and other systems), it would be good to implement a https://github.com/tomaka/cpal Sink for playback, which will remove the dependency on portaudio/pulseaudio, somewhat reducing the inconvenience of (cross) compiling for Windows.

[awiouy]

I have come across these today:

• http://libsound.io/
• https://github.com/klingtnet/rsoundio or https://github.com/Timmmm/soundio-rs

What do you think?

[sashahilton00]

It looks to do a similar job to cpal, except that it's implemented by another library which has rust bindings, whilst cpal is pure rust. Is there a benefit to using libsound over cpal?

[mfeif]

One benefit is keeping Pulseaudio, which is the de-facto sound stack on all modern linux (I think).

[burnoutberni]

Is any work being done in this direction? A friend of mine just got one of these new Nokia "banana phones" and it runs KaiOS (formerly B2G/FirefoxOS), with all apps being "web apps". We're playing around with a couple of things now and an interesting side project might be to go ahead and try compiling librespot to WebAssembly. Not really sure where to start (Rust newbie here), but one of the main things would be to have WebAudio backend, which cpal seems to support.

[willstott101]

Since #277 got merged I guess this can be closed now?

Taking this opportunity to mention that the README is now out of date.

[sashahilton00]

Yup. Updated the readme. Closing.