Initial support for libsoundio

[shtirlic]

Support for C library for cross-platform real-time audio input and output
http://libsound.io/
https://github.com/andrewrk/libsoundio

Everything works, please try, need suggestion about settings for software latency.

[mikebrady]

Hi Serg. This looks exciting. However, I wonder if it wouldn't be better targeted to the development branch. What do you think? It'll have to go there anyway to have a future. Would there be a lot of work in it?

[shtirlic]

Hi Mike, changed base branch and updated some code, I see that there is a new format in play method, should it be mapped to the target lib formats or we are using default short 2bytes ?

[mikebrady]

Many thanks for this Serg.

I'm not sure what you are referring to.

Do you mean that there is a format parameter in the init() function? If so, that should use the enumeration defines in common.h. These are different, unfortunately, to the ALSA enumeration values, so they are translated into ALSA enumerations in audio_alsa.c. Obviously, you don't have to use ALSA stuff in your libsoundio stuff.

The format and the rate default to 16-bit interleaved stereo at 44,100 frames per second anyway, so you may not have to worry.

Sorry if this is not relevant to your question...

[mikebrady]

Hi Serg. I'm merging the pull request, even though I don't know whether you message of December 3 means it doesn't work. Let us travel hopefully :)

[shtirlic]

Hi Mike, I mixed up the method name it was start 's new format param, but it's ok since I use 16-bit interleaved stereo at 44,100 by default, I will add correct mappings if anyone will encounter issues with custom formats.

[mikebrady]

Great, thanks.