kern/52585: AUDIO_GETENC does not return actual encodings

[isaki%pastel-flower.jp@localhost]

>Number:         52585
>Category:       kern
>Synopsis:       AUDIO_GETENC does not return actual encodings
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sat Sep 30 14:25:00 +0000 2017
>Originator:     Tetsuya Isaki
>Release:        NetBSD 8.99.3
>Organization:
>Environment:
NetBSD 8.99.3 i386
>Description:
ioctl(AUDIO_GETENC) always returns
slinear_le:16,slinear_be:16*,ulinear_le:16*,ulinear_be:16*,mulaw:8*,alaw:8*
(this is the output of "audioctl -n encodings")
but actually accepted encoding is different.
The current audio(4) also accepts ulinear8 or slinear32.

In addition, AUDIO_ENCODINGFLAG_EMULATED is not correct anymore.
>How-To-Repeat:
N/A
>Fix:
N/A