xen/sndif: add sound-device ABI
Add ABI for the two halves of a para-virtualized sound driver to communicate with each other. The ABI allows implementing audio playback and capture as well as volume control and possibility to mute/unmute audio sources. Note: depending on the use-case backend can expose more sound cards and PCM devices/streams than the underlying HW physically has by employing SW mixers, configuring virtual sound streams, channels etc. Thus, allowing fine tunned configurations per frontend. Signed-off-by:Oleksandr Andrushchenko <oleksandr_andrushchenko@epam.com> Signed-off-by:
Oleksandr Grytsov <oleksandr_grytsov@epam.com> Signed-off-by:
Oleksandr Dmytryshyn <oleksandr.dmytryshyn@globallogic.com> Signed-off-by:
Iurii Konovalenko <iurii.konovalenko@globallogic.com> Acked-by:
Juergen Gross <jgross@suse.com> Signed-off-by:
Juergen Gross <jgross@suse.com>
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