Improve USB audio mixer support for USB audio class 1 and 2.
- make sure volume controls are correctly mapped to "pcm" and "rec" depending on how they deliver audio to the USB host. - make sure there are no duplicate record selections. - remove internal only mixer class type. - don't add software volume controls for recording only. - some minor mixer code cleanup. Tested by: Horse Ma <Shichun.Ma@dell.com> MFC after: 1 week Sponsored by: Mellanox Technologies
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2020-12-20 02:59:44 +00:00
svn path=/head/; revision=359355